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Ordering number : ENN7543
Monolithic digital IC
LB11690, 11690H
Pre-Driver IC for Brushless Motor Drive in Electric Bicycles
Overview
The LB11690 and LB11690H are three-phase bipolar PWM drive pre-driver ICs that allow the output circuits to be implemented using only n-channel FETs. These ICs can implement, at low cost, high-efficiency drive circuits in applications that use motors that require high drive currents. These ICs include a built-in Hall sensor signal F/V conversion circuit and can provide a voltage that is proportional to motor speed for use, for example, in speedometers for electric bicycles. These ICs also support use in applications that holds the speed controlled at a constant rate as the load varies.
Package Dimensions
unit: mm 3196A-DIP30SD
[LB11690]
27.0
30
16
0.95 3.0 3.95max (3.25)
Functions and Features
* Three-phase bipolar PWM drive (high and low side n-channel FET drive) * Maximum supply voltage: 45 V * Gate drive voltage: about 10 V (high and low side n-channel FETs) * Hall sensor signal F/V conversion circuit (one-shot multivibrator output) * Synthesized three-phase Hall sensor signal output * Built-in current limiter and undervoltage protection circuits
0.51min
0.48 1.78
(1.04)
SANYO: DIP30SD (400 mil)
3235A-HSOP36
[LB11690H]
0.65 17.8 (6.2) 2.7
36
(4.9)
1
(0.5) (2.25) 0.8 2.0 0.3
0.25
2.45max
0.1
SANYO: HSOP36 (375 mil)
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
13004TN (OT) No. 7543-1/19
10.5
7.9
0.25
1
15
10.16
8.6
LB11690, 11690H
Specifications
Absolute Maximum Ratings at Ta = 25C (Note: Ratings for the LB11690H are preliminary.)
Parameter Supply voltage 1 Supply voltage 2 Output current 1-1 Output current 1-2 Output current 2 RF pin applied voltage LVS pin applied voltage IN pin applied voltage RES pin applied voltage TOC pin applied voltage EI+ pin applied voltage EI- pin applied voltage RC pin applied voltage FV pin applied voltage HP pin applied voltage Symbol VCC max VB max IO max1-1 IO max1-2 IO max2 VRF max VLVS max VIN max VRES max VTOC max VEI+ max VEI- max VRC max VFV max VHP max Pd max1 Allowable power dissipation Pd max2 Topr Tstg Independent IC (LB11690 and LB11690H) Mounted on designated PCB: 114.3 x 76.1 x 1.6 mm, glass epoxy (LB11690H) IN1, IN2, and IN3 pins VCC pin VB pin UL, VL, and WL pins, sink current UL, VL, and WL pins, source current UH, VH, and WH pins Conditions Ratings 45 60 40 30 20 4 60 V5 + 0.3 V5 + 0.3 V5 + 0.3 V5 + 0.3 V5 + 0.3 V5 + 0.3 V5 + 0.3 45 0.9 2.1 -20 to +100 -55 to +150 Unit V V mA mA mA V V V V V V V V V V W W C C
Operating temperature Storage temperature
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage range 1 Supply voltage range 2 Output current 1-1 Output current 1-2 Output current 2-1 Output current 2-2 12 V constant voltage output current 5 V constant voltage output current HP pin applied voltage HP pin output current Symbol VCC VB IOUT1-1 IOUT1-2 IOUT2-1 IOUT2-2 I12REG I5REG VHP IHP VCC pin VB pin UL, VL, and WL pins, sink current UL, VL, and WL pins, source current UH, VH, and WH pins, sink current UH, VH, and WH pins, source current Conditions Ratings 15 to 42 VCC + 13 30 -25 15 -15 -30 -30 0 to 42 0 to 5 Unit V V mA mA mA mA mA mA V mA
Electrical Characteristics at Ta = 25C, VCC = 36 V
Parameter Current drain [5 V Constant Voltage Output (V5 pin)] Output voltage Line regulation Load regulation Temperature coefficient Note :*Design target values and are not tested. V5REG V5REG1 V5REG2 V5REG3 IO = -5 mA VCC = 15 to 42 V IO = -5 to -30 mA Design target value* 4.7 5.0 40 10 0 5.3 100 30 V mV mV mV/C Symbol ICC Conditions Ratings min typ 15 max 20 Unit mA
Continued on next page.
No. 7543-2/19
LB11690, 11690H
Continued from preceding page.
Parameter [12 V Constant Voltage Output (V12 pin)] Output voltage Line regulation Load regulation Temperature coefficient V12REG V12REG1 V12REG2 V12REG3 VOH1 VOL1 VOH2 VOL2 VBOUT VOH (CP1) VOL (CP1) VIO (CONT) IB (CONT) VICM VOH (CONT) VOL (CONT) ITOC = -0.2 mA ITOC = 0.2 mA f (CONT) = 1 kHz 45 ICP1 = -2 mA ICP1 = 2 mA IO = - 5 mA VCC = 15 to 42 V IO = -5 to -30 mA Design target value* 11.2 12.0 120 10 0 12.8 240 30 V mV mV mV/C Symbol Conditions Ratings min typ max Unit
[Output Block] Conditions: UOUT = VOUT = WOUT = 18 V, when 48 V is applied to VB Output high level voltage 1 Output low level voltage 1 Output high level voltage 2 Output low level voltage 2 [Charge Pump Output (VB pin)] Output voltage [CP1 Pin] Output high level voltage Output low level voltage [Integrating Amplifier] Input offset voltage Input bias current Common-mode input voltage range Output high level voltage Output low level voltage Open-loop gain [PWM Oscillator (PWM pin)] Output high level voltage Output low level voltage External capacitor charge current Oscillator frequency Amplitude [TOC Pin] Input voltage 1 Input voltage 2 Input voltage 1L Input voltage 2L Input voltage 1H Input voltage 2H [Current Limiter Circuit (RF pin)] Limit voltage Note :*Design target values and are not tested. VRF 85 100 115 V VTOC1 VTOC2 VTOC1L VTOC2L VTOC1H VTOC2H Output duty: 100% Output duty: 0% Design target value*, 100% when V5 = 4.7 V Design target value*, 0% when V5 = 4.7 V Design target value*, 100% when V5 = 5.3 V Design target value*, 0% when V5 = 5.3 V 2.72 0.99 2.72 0.99 3.08 1.11 3.0 1.2 2.80 1.08 3.20 1.22 3.30 1.34 2.90 1.17 3.30 1.34 V V V V V V VOH (PWM) VOL (PWM) ICHG f (PWM) V (PWM) VPWM = 2.1 V C = 270 pF 2.75 1.0 -35 31 1.6 3.0 1.2 -25 39 1.8 3.25 1.3 -19 48 2.1 V V A kHz Vp-p -10 -1 0 V5 - 1.1 V5 - 0.8 0.8 51 1.1 +10 +1 V5 - 1.7 mV A V V V dB VCC - 1.9 VCC - 1.4 1.5 2.0 V V 46.0 48.0 50.5 V UL, VL, and WL pins, IOH = -10 mA UL, VL, and WL pins, IOL = 10 mA UH, VH, and WH pins, IOH = -5 mA UH, VH, and WH pins, IOL = 5 mA 46.8 V12 - 1.2 V12 - 0.8 0.8 47.2 18.2 18.6 1.2 V V V V
Continued on next page.
No. 7543-3/19
LB11690, 11690H
Continued from preceding page.
Parameter [Undervoltage Protection Circuit (LVS pin)] Operating voltage Release voltage Hysteresis [Reset Circuit (RES pin)] Reset operating voltage Reset release voltage Hysteresis [HP Pin] Output saturation voltage Output leakage current [RC Pin] Output high level voltage Output low level voltage Clamp voltage [FV Pin] Charge current Discharge current [IN1, IN2, and IN3 Pins] Input high level voltage Input low level voltage Input open voltage Hysteresis Input high level current Input low level current VIH (IN) VIL (IN) VIO (IN) VIS (IN) IIH (IN) IIL (IN) VIN = V5 VIN = 0 V 4.0 0 V5 - 0.5 0.55 -10 0.9 0 -500 V5 2.5 V5 1.25 +10 V V V V A A ICHG1 ICHG2 VFV = 2.5 V VFV = 1 V -420 1.3 -300 2.5 -230 5.0 A mA VOH (RC) VOL (RC) VCLP (RC) 3.12 0.73 3.4 0.8 1.5 3.68 0.87 V V V VHPL IHP leak IO = 3 mA VHP = 42 V 0.15 0.5 10 V A VRESL VRESH VRES 1.17 1.37 0.2 1.27 1.5 0.23 1.37 1.63 0.26 V V V VSDL VSDH VSD 3.6 4.1 0.35 3.8 4.3 0.5 4.0 4.5 0.65 V V V Symbol Conditions Ratings min typ max Unit
Allowable power dissipation, Pd max -- W
1.0
Allowable power dissipation, Pd max -- W
Pd max -- Ta
0.9 W, Independent IC
[LB11690]
2.4
Pd max -- Ta
2.1 W
[LB11690H]
Mounted on designated PCB (114.3 x 76.1 x 1.6 mm, glass epoxy)
0.8
2.0
1.6
0.6
1.2
0.4 0.36
0.9 W, Independent IC
0.8
0.84
0.2
0.4
0.36
0 -20
0
Ambient temperature, Ta -- C
20
40
60
80
100 120 ILB01549
0 -20
0
Ambient temperature, Ta -- C
20
40
60
80
100 120 ILB01552
No. 7543-4/19
LB11690, 11690H Three-Phase Logic Truth Table
IN1 1 2 3 4 5 6 H H H L L L IN2 L L H H H L IN3 H L L L H H High side gate VH WH WH UH UH VH Low side gate UL UL VL VL WL WL HP H L H L H L
* In the state where the high side gate is VH and the low side gate is VL, the high side FET connected to the VH pin will be on and the low side FET connected to the UL pin will also be on. * Since the HP output is an open collector output, the high output level is the open state.
Pin Assignments
VB 30 VCC 29 V12 28 V5 27 LVS 26 CP1 25 CP2 24 HP 23 RC 22 FV 21 PWM 20 TOC 19 EI- 18 EI+ 17 RES 16
LB11690
1
2
3 RF
4 WL
5 WOUT
6 WH
7 VL
8 VOUT
9 VH
10 UL
11 UOUT
12 UH
13 IN1
14 IN2
15 IN3 Top view
GND RFGND
NC 36
VCC 35
NC 34
V12 33
V5 32
NC 31
LVS CP1 CP2 30 29 28
FRAME
HP 27
RC 26
FV PWM TOC 25 24 23
EI- 22
EI+ 21
RES 20
NC 19
LB11690H
1 VB
2 GND
3 RF GND
4 RF
5 WL
6 8 7 NC WOUT WH
9 VL
FRAME
11 10 VOUT VH
12 13 14 UL UOUT UH
15 NC
16 IN1
17 IN2
18 IN3
Top view
No. 7543-5/19
LB11690, 11690H Pin Functions *: Items in parentheses refer to the LB11690H.
Pin name GND RFGND RF WL VL UL WOUT VOUT UOUT WH VH UH IN1 IN2 IN3 RES EI+ EI- TOC PWM FV RC HP CP2 CP1 LVS V5 V12 VCC VB (FRAME) Pin No. 1 (2) 2 (3) 3 (4) 4 (5) 7 (9) 10 (12) 5 (7) 8 (10) 11 (13) 6 (8) 9 (11) 12 (14) 13 (16) 14 (17) 15 (18) 16 (20) 17 (21) 18 (22) 19 (23) 20 (24) 21 (25) 22 (26) 23 (27) 24 (28) 25 (29) 26 (30) 27 (32) 28 (33) 29 (35) 30 (1) -- (6) (15) (NC) (19) (31) (34) (36) These pins are not connected to the IC internally in the package, and thus may be used for wiring connections. Reset input. Insert a resistor between this pin and the V5 pin, and a capacitor between this pin and ground. Integrating amplifier noninverting input Integrating amplifier inverting input PWM waveform comparison (integrating amplifier output) PWM oscillator frequency setting. Insert a capacitor between this pin and ground. Hall sensor signal one-shot multi-pulse output Hall sensor signal one-shot multi-pulse amplitude setting. Insert a resistor between this pin and the V5 pin, and a capacitor between this pin and ground. Hall sensor signal three-phase synthesized output (open collector output) Charge pump capacitor connections. Connect a capacitor between pins CP1 and CP2. Undervoltage protection voltage detection. To detect a voltage of 5 V or over, connect a zener diode in series to set the detection voltage. 5 V power supply (control circuit power supply). Insert a capacitor between this pin and ground. 12 V power supply (UL, VL, and WL output block power supply). Insert a capacitor between this pin and ground. Power supply. Insert a capacitor between this pin and ground for power supply stabilization. Charge pump output (UH, VH, and WH output block power supply). Insert a capacitor between this pin and VCC. The FRAME pin is connected to the IC lower surface metal frame. Both should be left electrically open during operation. Hall sensor signal inputs. Insert capacitors between these pins and ground for stabilization. High side n-channel power FET gate drive output High side n-channel power FET source voltage detection Low side n-channel power FET gate drive output Ground Ground sensing pin. Connect the ground side of the low-resistance resistor RF connected to the RF pin to this pin. Output current detection pin. Connect the low-resistance resistor RF between this pin and ground. The output current will be limited to a value determined by the equation IOUT = 0.1/RF. (Current limiter circuit) Pin description
No. 7543-6/19
LB11690, 11690H Pin Functions *: Items in parentheses refer to the LB11690H.
Pin No. 1 (2) Pin Name GND Ground Pin description Ground Equivalent circuit
V5
2 (3)
RF GND
Connect the ground side of the external resistor Rf to this pin.
2
V5
3 (4)
RF
Output current detection Connect the low-resistance resistor RF between this pin and ground. The maximum output current is determined by the equation IOUT = 0.1/RF.
3
V12
4 (5) 7 (9) 10 (12)
WL VL UL
Outputs (Low side n-channel power FET gate drive outputs) The duty is controlled.
4 50 k
7
10
VB
5 (7) 8 (10) 11 (13) WOUT VOUT UOUT Voltage detection (High side n-channel power FET source voltage detection)
6 50 k
9
12
6 (8) 9 (11) 12 (14)
WH VH UH Outputs (High side n-channel power FET gate drive outputs)
5
8
11
Continued on next page.
No. 7543-7/19
LB11690, 11690H
Continued from preceding page.
Pin No. Pin Name Pin description Equivalent circuit
V5 8 k
13 (16) 14 (17) 15 (18) IN1 IN2 IN3 Hall sensor signal inputs When open, these pins go to the high level. Insert capacitors between these pins and ground for stabilization.
2 k 10 k
13 14 15
V5
16 (20)
RES
Reset
300 16
LVSD
V5
17 (21) EI+ Integrating amplifier noninverting input
300 17 RES
18 (22) EI- Integrating amplifier inverting input
300 18
V5
19
19 (23) TOC Integrating amplifier output (PWM waveform comparison)
300 40 k
Continued on next page.
No. 7543-8/19
LB11690, 11690H
Continued from preceding page.
Pin No. Pin Name Pin description Equivalent circuit
V5
20 (24)
PWM
PWM oscillator frequency setting Insert a capacitor between this pin and ground.
300 7.5 k 20
V5
21 (25)
FV
Hall sensor signal one-shot multi-pulse output
300 21
V5
22 (26)
RC
Hall sensor signal one-shot multi-pulse amplitude setting Insert a resistor between this pin and the V5 pin, and a capacitor between this pin and ground.
300 22
V5
23
23 (27) HP Hall sensor signal three-phase synthesized output (Open collector output)
Continued on next page.
No. 7543-9/19
LB11690, 11690H
Continued from preceding page.
Pin No. Pin Name Pin description Equivalent circuit
VCC
24 (28)
CP2
VB
300 24
Charge pump capacitor connections Connect a capacitor between pins CP1 and CP2.
VCC
25 (29)
CP1
300 25
V5
26 (30)
LVS
Undervoltage protection voltage detection. To detect a voltage of 5 V or over, connect a zener diode in series to set the detection voltage.
46 k 26 18 k VCC
27 (32)
V5
Stabilized power supply output (5 V output) Insert a capacitor (about 0.1 F) between this pin and ground for power supply stabilization.
27
Continued on next page.
No. 7543-10/19
LB11690, 11690H
Continued from preceding page.
Pin No. Pin Name Pin description Equivalent circuit
VCC
28 (33)
V12
Stabilized power supply output (12 V output) Insert a capacitor (about 0.1 F) between this pin and ground for power supply stabilization.
28
29 (35)
VCC
Power supply Insert a capacitor between this pin and ground for power supply stabilization. Charge pump output (UH, VH, and WH output block power supply) Insert a capacitor between this pin and VCC. The FRAME pin is connected to the IC lower surface metal frame internally. Both should be left electrically open during operation. These pins are not connected to the IC internally in the package, and thus may be used for wiring connections.
30 (1)
VB
(FRAME) (6) (15) (19) (31) (34) (36)
(NC)
No. 7543-11/19
LB11690, 11690H LB11690/LB11690H Function Description 1. Output Drive Circuit This IC was designed assuming that n-channel FETs would be used in both the low and high side output circuits. Direct PWM drive was adopted as the drive method to minimize power loss in the outputs. The output transistors are always saturated when on, and the motor drive power is adjusted by changing the output on duty. The output PWM switching is performed on the low side output circuits connected to the UL, VL, and WL pins. Since the reverse recovery time for the diodes built into the high side (the non-PWM side) output FETs can become a problem, the devices used must be selected carefully. (If diodes with a short reverse recovery time are not used, through currents may flow at the instant the PWM side transistors turn on.) For oscillation prevention Capacitors (about 0.1 F) must be inserted close to the output FETs for each of the three phases to prevent high-frequency To VCC oscillator due to the PCB pattern. UH pin If the FET switching speed is too fast and leads to problems, adjust the speed by inserting a series resistor in the gate line. If UOUT pin To the motor coil the low side (PWM side) FET on speed is too fast, through UL pin currents may flow. However if too large a resistance is inserted in the gate line, the gate waveform may become less sharp. To RF For through current When the PWM on duty is low, the gate voltage may be prevention insufficient. This can lead to excessive heating or even destruction of the low side FET. Even if a resistor is not inserted, a similar phenomenon may occur if the FET gate capacitance is relatively large. In such cases, the lowest duty used must be limited, taking the ASO of the switching device used into consideration. Depending on the FET devices used, through currents may flow when the PWN on duty is low. One workaround for this problem is to insert capacitors between the gate and source of the high side FETs. However, if the capacitor values are too high, switching may become too slow, resulting in excessive heating in the high side FETs. 2. Current Limiter Circuit The current limiter circuit limits the (peak) current at a current determined by the equation I = VRF/Rf (where VRF is 0.1 V (typical) and Rf is the value of the current detection resistor). The current limiter operates by reducing the output on duty, thus reducing the output current. This circuit can be operated at a precise current limit value by connecting both ends of the current detection resistor as close as possible to the RF and RFGND pins. If a current detection resistor with an extremely small value is used, the PCB pattern must be designed so that the wiring 3 k RF pin resistance components for each phase are as close to identical Current detection as possible. If there are differences in the wiring resistance 1 k resistor components between the phases, the current limit value will RFGND pin change each time the phase changes. This can lead to motor vibration and motor noise. While the reference voltage is set to 0.1 V to minimize power loss in the current detection resistor, it may be desirable to use RF pin a larger current detection resistor value in some applications. Current detection resistor In such cases, a resistor divided voltage must be input to the RFGND pin RF pin. If the resistor ratio shown in the figure is used, a current detection resistor about 4 times larger can be used. The current limiter circuit includes a built-in filter circuit so that the current limiter circuit does not operate incorrectly due to detecting the output diode reverse recovery current due to PWM operation. In most applications, the built-in filter circuit will function without problem. If problems due occur (if the diode reverse recovery current flows for more than 1 s), add an external filter circuit such as a low-pass RC filter. However, be careful not to insert excessive delay, as that will delay detection by the current limiter circuit.
No. 7543-12/19
LB11690, 11690H 3. PWM Oscillator Circuit The PWM frequency is determined by the capacitor C (rated in F) connected to the PWM pin. fPWM 1/(93000 x C) When a 270 pF capacitor is used, the frequency will be about 39 kHz. If the PWM frequency is too low, the motor will generate audible noise at the switching frequency, and if it is too high, the power loss will increase. A frequency in the range 20 to 50 kHz is desirable. Connect the ground side of this capacitor to a point as close as possible to the IC ground pin to minimize the influence of output noise. 4. Control Methods The output duty is determined by comparing the PWM oscillator waveform to the TOC pin voltage. When the TOC pin voltage is about 1.2 V or lower, the duty will be 0%, and when that voltage is 3.0 V or higher, the duty will be 100%. Normally, the integrating amplifier is used as a full feedback amplifier (with TOC the EI- pin and the TOC pin connected directly), and the control voltage is Control voltage input to the EI+ pin. (Here, the output duty increases as the EI+ voltage increases.) When the EI+ pin is set to the reset operating state by the RES pin, the EI pin voltage is lowered to a level close to the ground level by an IC EI- internal transistor. (This is to discharge the capacitor.) Therefore, do not EI+ connect a low-impedance power supply directly to this pin, but rather input the voltage through a resistor. Also, a pull-down resistor must be inserted between the EI+ pin and ground so that the motor does not operate when the control voltage is in the open state. If there is noise on the control voltage or if To the FV pin it is desirable to suppress rapid fluctuations in the control voltage, a noise TOC rejection capacitor must be inserted between the EI+ pin and ground. The operating voltage range can be expanded by inputting the control voltage to the EI+ pin through a resistor voltage divider as shown in the figure. Control voltage EI- A speed control circuit using the FV pin can be implemented as shown in the figure to control the motor so that a constant speed is maintained to a certain EI+ degree despite variations in the load. A resistor of 25 k or larger must be used between the FV and EI+ pin. The feedback capacitor must be selected so that the TOC pin voltage is adequately stable at low speeds. 5. Charge Pump Circuit The charge pump steps up the supply voltage to generate the high side FET gate voltage. The capacitor CP connected between the CP1 and CP2 pins is used for step up, and charge is stored on the capacitor CB connected between the VB and VCC pins. The capacitances of CP and CB must have the following relationship. CB CP x 4 The CP capacitor is charged and discharged based on the PWM frequency. While increasing the capacitance of the capacitor C increases current capacity of the VB power supply, if the capacitance is too large, the charge and discharge operation may be inadequate. Note that the larger the capacitance of the capacitor VB, the more stable the VB voltage will be. However, if that capacitance is too large, the time before the VB voltage is generated when power is first applied will increase. While testing and evaluation is required to set the values of the capacitors CP and CB, use the following table as a reference for the initial values. When the VCC supply voltage is under 20 V, the VB power supply current capacity falls rapidly causing the VB voltage to fall. Care is required in application design to assure that this does not become a problem.
VCC voltage CP CB 24 V 0.1 F 1 F 36 V 6800 pF 0.47 F
No. 7543-13/19
LB11690, 11690H 6. Hall Sensor Input Signals The outputs of the Hall sensor IC are connected to this IC's Hall sensor inputs. Since the IC includes internal pull-up resistors (about 10 k) to the 5 V regulator, normally, there is no need for external pull-up resistors. If a Hall sensor IC with built-in pull-up resistors is used, no problems will occur as long as the Hall sensor IC uses a 5 V power supply. However, pull-down resistors and voltage clamping 12 V zener diodes must be added to assure that voltages over 5 V are Hall sensor IC 5V LB11690, not applied to this IC if the Hall sensor IC uses a 12 V power 11690H supply. IN The inputs are comparator inputs with a hysteresis of about 0.9 V. If noise becomes a problem, noise rejection capacitors must be inserted between the inputs and ground. If all three of the Hall input signals go to the same input state, all the outputs, both the high side and low side, will go to the off state. 7. Undervoltage Protection Circuit The undervoltage protection circuit detects the voltage applied to the LVS pin and if that voltage falls under the operating voltage (3.8 V typical), the drive outputs are all set to the off state. This circuit has hysteresis to prevent the circuit from repeatedly turning the outputs on and off when the supply voltage is close to the protection operating voltage. Therefore, the output will not recover unless the supply voltage rises to about 0.5 V above the circuit's operating voltage. Also, the RES pin voltage goes to the low level in the protection operating state. The protection operating voltage is set to be the detection level To the detected power supply for a 5 V system. The detection level can be increased by Vz inserting a zener diode in the LVS pin to level shift the detection level. (The detection voltage will then be the zener voltage (Vz) LVS pin plus 3.8 V (typical).) The LVS pin sink current during detection is about 62 A. If it is necessary to stabilize the zener diode voltage increase and to minimize variations in the zener voltage, insert a resistor between the LVS pin and ground to increase the zener current. It is also possible to increase the detection voltage To the detected power supply without using a zener diode by using a resistor voltage divider. If the circuit in the figure is used, the detection and release R1 voltages will be as follows. LVS pin Detection voltage ((3.8 / R2) + 62 A) x (R1 + R2) R2 Release voltage ((4.3 / R2) + 70 A) x (R1 + R2) If R1 is 13 k and R2 is 2.2 k, the detection voltage will be about 27 V and the release voltage will be about 31 V. Note that errors in the detection voltage due to temperature and sample-to-sample variations increase as the value of the resistor R2 increases. If this protection circuit is not used, the LVS pin must not be left open (the outputs are turned off when this pin is open). Rather, a voltage at a level at which the circuit does not operate must be applied. 8. RES Circuit When power is first applied, the application must apply an initial reset to the RES pin to assure stable operation. The initial reset performs the following operations. * All the drive outputs are turned off. * The EI+ pin voltage is forced to the low level. * The FV pin voltage is forced to the low level. Normally, a resistor and a capacitor are inserted between the RES pin and the V5 pin and the RES pin and ground, respectively, to set the reset time. A resistor with a value of 2.7 k or higher must be used. The time constant must be set to a value such that R x C 1 ms (if a 10 k resistor is used, the capacitor must be 0.1 F or larger). However, in cases where it is necessary to completely discharge the capacitors on the EI+ and FV pins, the reset time must be set to cover those discharge times. It is also desirable to set the reset time to be longer than the time required to stabilize the VB voltage after power is first applied.
Continued on next page. No. 7543-14/19
LB11690, 11690H
Continued from preceding page.
The IC remains in the reset state as the RES pin voltage goes from 0 V to about 1.5 V. Since the reset circuit has a hysteresis of about 0.23 V, the IC will not return to the reset state unless the RES pin voltage falls to under 1.27 V. In addition to the initial reset, the RES pin can also be used to apply a reset when the control voltage is low as shown in figure 1. This circuit sets all the drive outputs to the off state when the control voltage reaches about 0.67 V (1.27 V - VBE). Here, the reset release voltage is about 0.9 V (0.67 V + 0.23 V). In the state when 0% duty (1.2 V or lower) is set up with just the control voltage, the circuit will function as a brake if the motor is operated in the reverse direction. Thus the circuit shown here can be useful if braking is not required during reverse rotation. If the control voltage cannot be lowered below 1 V, a circuit such as that shown in figure 3 can be used. Applications that use a thermistor to detect the temperature and prevent thermal destruction of the FETs can also be considered. The FETs can be protected by adjusting the value of the external resistor connected as shown in figure 2. Figure 4 shows how to combine this application circuit with the application circuit shown in figure 3.
To the control voltage (1 V to 4 V) To the V5 pin
To the V5 pin To the control voltage RES pin EI+ pin
Figure 1 To the V5 pin
RES pin
Thermistor Figure 2 To the control voltage (1 V to 4 V)
10 k
RES EI+
10 k
RES 47 k
EI+
Figure 3
Figure 4
9. RC and FV Circuits The RC pin sets the pulse width (the high-level period) of the signal generated at the FV pin at each edge (both rising and falling edges) of the HP signal (the three-phase synthesized Hall signal). The pulse width is set by connecting a resistor between the RC pin and the V5 pin and a capacitor between the RC pin and ground. The pulse width, TRC, can be calculated with the following formula. To the V5 pin TRC (seconds) 1.1 x R x C The FV pin is normally smoothed with an RC circuit such as that shown in the figure. A resistor with a value of 25 k or higher must be used. Choose a RC pin capacitance such that the FV voltage is smoothed adequately at low motor speeds. Normally, TRS is set to meet the following condition when the HP signal frequency at the highest motor speed is fHP (Hz). TRC (seconds) 1 / (2 x fHP) FV voltage Here, the FV voltage will vary from 0 to about 5 V according to the motor speed. FV pin The FV voltage can be used for speed feedback or speedometer display by using an analog meter or level meter IC. If the FV output is not used, the RC pin must be connected to ground and the FV pin must be left open. 10. Power Supply Stabilization Since this IC uses a switching based drive technique, it can easily cause voltage fluctuations in the power supply lines. This means that capacitors fully adequate to stabilize the supply voltage must be inserted between the VCC pin and ground. If diodes are inserted in the power supply lines to prevent damage when the power supply is connected with the polarity reversed, voltage fluctuations in the power supply lines can occur even more easily. In such applications, even larger capacitors are required.
No. 7543-15/19
47 k
LB11690, 11690H 11. Regulator Output Voltage Stabilization Capacitors of 0.1 F or larger must be inserted between the V5 (5 V control circuit power supply) and V12 (12 V low side drive output circuit power supply) pins and ground. The ground sides of these capacitors must be connected to points as close as possible to an IC ground pin. VCC While each of these outputs can provide currents of up to 30 mA to external circuits, care is required since this can increase IC heating. If this V5 or Hall sensor IC power supply IC is used as the power supply for the Hall sensor IC and other circuits and V12 pin heating becomes a problem, use an external transistor as shown in the figure so that this heating load is born by that transistor.
Hall Sensor Input to Drive Output Timings
Hall sensor input
IN1
IN2
IN3 Pre-driver output
UL
VL WL UH VH WH Hall sensor signal pulse output HP
FV output
T 1.1RC
denotes a PWM output.
No. 7543-16/19
V5
FV V12 5-V REG VCC VB LVS 12-V REG Zener diode
RC HP CP1 CP2
V5
Sample Application Circuit
One-shot multi HP
Charge pump
36 V
TOC
Speed control LVSD - + PRI driver Logic UL VH VOUT VL Logic Hall logic WH WOUT WL Hall HYS comp UH UOUT
EI-
-
EI+
+
LB11690, 11690H
PWM
PWM OSC
RES
CURR LIM
RF
RES V5 or V12
V5 GND
IN1
IN2
IN3
RFGND
No. 7543-17/19
V5
FV V12 Zener diode One-shot multi HP VCC VB LVS 5-V REG 12-V REG Charge pump
RC HP CP1 CP2
V5
36 V
TOC
EI- LVSD - + PRI driver Logic UL VH VOUT VL Logic Hall logic WH WOUT WL Hall HYS comp UOUT UH
-
EI+
+
Sample Application Circuit (Closed Loop Speed Control)
Speed control
LB11690, 11690H
PWM
PWM OSC
RES
CURR LIM
RF
V5 V5 or V12
RES
GND
IN1
IN2
IN3
RFGND
No. 7543-18/19
Thermistor
LB11690, 11690H
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of January, 2004. Specifications and information herein are subject to change without notice. PS No. 7543-19/19

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