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UTC UA8868
5-CHANNEL BTL DRIVER FOR DVD PLAYER
DESCRIPTION
The UTC UA8868 is a five-channel BTL driver IC for driving the motors and actuators such as used in DVD player and CD-ROM.
LINEAR INTEGRATED CIRCUIT
FEATURES * Built-in 5 channel drivers:
Dual actuator drivers Sled motor driver Spindle driver Tray in-out driver * Built-in Two independent comparators * Thermal shut down and Mute circuit.
HSOP-28
*Pb-free plating product number: UA8868L
BLOCK DIAGRAM
28 27 26
60K
25
24
+
23
22
PGND
21
20
19
Vcc2
18
17
16
15
GND
Stand by
60K
90K + Spindle Driver Actuator Driver (4x)
+-
Thermal Shut down
150K Vcc2 Vcc2 + 60K 150K Pre-DRV + PGND Vcc1 TRAY DRIVER Sled Driver Actuator Driver (4x) Vcc1
+
-
150K
60K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
1
QW-R109-020,B
www.unisonic.com.tw
UTC UA8868
PIN DESCRIPTION
LINEAR INTEGRATED CIRCUIT
PIN NO PIN NAME FUNCTION 1 VINFC Input for focus driver 2 OP2INComparator 2 input (-) 3 OP2IN+ Comparator 2 input (+) 4 VINSL+ OPAMP input (+) for the sled driver 5 OP2OUT Comparator 2 output 6 FWD Tray driver forward input 7 REV Tray driver reverse input 8 Vcc1 Vcc for pre-drive block and power block of sled and tray 9 VOTRTray driver output (-) 10 VOTR+ Tray driver output (+) 11 VOSLSled driver output (-) 12 VOSL+ Sled driver output (+) 13 VOFCFocus driver output (-) 14 VOFC+ Focus driver output (+) 15 VOTK+ Tracking driver output (+) 16 VOTKTracking driver output (-) 17 VOLD+ Spindle driver output (+) 18 VOLDSpindle driver output (-) 19 Vcc2 Vcc for power block of spindle, tracking and focus 20 OP1OUT Comparator 1 output 21 VCTL Speed control input of tray driver 22 GND Ground 23 VINLD Input for spindle driver 24 OP1INComparator 1 input (-) 25 OP1IN+ Comparator 1 input (+) 26 VINTK Input for tracking driver 27 BIAS Input for reference voltage 28 MUTE Input for mute control Notes: Pin Name of + and - (output of drivers) means polarity to input pin. (For example, if voltage of pin1 is high, pin14 is high.)
ABSOLUTE MAXIMUM RATINGS
(Ta=25 ) SYMBOL Vcc1 Supply Voltage Vcc2 Power Dissipation PD Operating Temperature Range Topr Storage Temperature Range Tstg *When mounted on a 70mm x70mm x1.6mm glass epoxy board. *Reduced by 13.6mW for each increase in Ta of 1 over 25 **Should not exceed Pd or ASO and Tj=150 values PARAMETER RATINGS 13.5 *1.7 0 ~ +70 **-40 ~ +150 UNIT V w
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
2
QW-R109-020,B
www.unisonic.com.tw
UTC UA8868
GUARANTEED OPERATING CONDITIONS
(Ta=25 ) PARAMETER Power Supply Voltage SYMBOL Vcc1 Vcc2
LINEAR INTEGRATED CIRCUIT
RATINGS 4.3 ~ 13.2 4.3 ~ Vcc1
UNIT V V
ELECTRICAL CHARACTERISTICS
(Ta=25 , VCC1=12V, VCC2=5V, BIAS=2.5V, RL=8/10/45) PARAMETER Quiescent Current Voltage For Mute ON Voltage For Mute OFF Actuator Drivers Output Offset Voltage Maximum Output Voltage Voltage Gain Sled Motor Driver Output Offset Voltage Maximum Output Voltage Closed Loop Voltage Gain Spindle Motor Driver Output Offset Voltage Maximum Output Voltage Voltage Gain Gain Error By Polarity Tray Motor Driver Output Saturation Voltage 1 Output Saturation Voltage Between F&R SYMBOL Icc Vston Vstoff Voo Vom Gv Voofsl Vomsl Gvsl Voofld Vomax Gvld Gvld VSAT1 VSAT1 TEST CONDITONS MIN TYP 30 0 2.0 MAX 0.5 5 50 @10 Load VIN=BIAS+0.2Vpp ac @1KHz 3.6 4.0 20 100 @ 8 Load VIN=BIAS+0.2Vpp ac @1KH 7.5 18 9.0 20 22 50 @ 8 Load VIN=BIAS+0.2Vpp ac @1KHz VIN=BIAS+0.2Vpp ac @1KHz 3.6 4.0 13.3 15.5 0 1 1.1 17.5 2 1.5 0.1 1.55 9.2 2.2 11 VCC 0.5 270 2.0 VCC11.5 6.0 400 UNIT mA V V mV V dB mV V dB mV V dB dB V V V dB V V A mV V V/mV mA mV
Output Saturation Voltage 2 VSAT2 Output Adjustable Gain On "H" Side VVtrH "H" Side output for input (VTCL) Voltage Tray Motor Driver Input Logic High Level Input Voltage VIH Low Level Input Voltage VIL High Level Input Current IIH VFWD=VREV=5V Comparator Input Offset Voltage Voofc Input Common-mode Voltage Range VCMC RL 15k Voltage Gain Gvc Output Sink Current Iosc Vout <1.5V Iosc 4mA Saturation Voltage Vsc * This device is not designed for protection against radioactive rays.
Upper+Lower saturation,IL=200mA 0.7 Output saturation voltage 1 between FWD and REV Upper+Lower saturation,IL=500mA 1.0 7.4 1.5 -0.3
180
0 50
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
3
QW-R109-020,B
www.unisonic.com.tw
UTC UA8868
POWER DISSIPATION CURVE
Pd (W)
LINEAR INTEGRATED CIRCUIT
2.0 1.5 1.0
25
50
75
100
125
150 Ta ( )
*70mm 70mm 1.6mm glass epoxy board. *Debating in done at 17.6mW / for operating above Ta=25
OPERATING NOTES
(1) The built-in thermal shutdown circuit will shutdown the output current when the chip junction temperature reaches 150 (typ.).The hysteresis is set to 25 (typ.), so the circuit will restart up if the chip temperature falled down below 125 (typ.) (2) If mute pin is setted to under 0.5V or NC, output current is off (except for spindle driver). Mute pin voltage should be higher than 2.0V for normal application. (3) Bias pin (pin 27) should be set to more than 1.2V for proper working. If the bias pin voltage is fall below 0.9V (typ.), the output current will be muted. (4) Insert the bypass capacitor (~ 0.1 F ) between Vcc pin and GND pin as close as possible. (5) when Vcc1 voltage drop to below 3.8V, functions are muted. The function will return to work when Vcc1 increase to over a hysterisis of 03.V (typ.) (6) Heat dissipation fins are connected to the GND of the chip. Make sure to connect them to power supply GND. Tray driver logic input: FWD (pin6) REV (pin7) VOL+ (pin10) VOL- (pin9) Function L L OPEN OPEN Open mode L H L H Reverse mode H L H L Forward mode H H L L Brake mode Input circuit of pin6 and pin7 is designed to avoid simultaneous activation of upper and lower output transistors.; however, in order to improve reliability, apply motor forward/reverse input once each input with time interval be longer than 10msec. "H" Side output voltage (VOL+, VOL-) varies depending on output control terminal for tray (pin21),which is set about three times of VTCL(pin21) (9.2dB Typ.). And, "L" Side output voltage is equal to output saturation voltage for working mode. . And the "H" side and "L" side output voltage are both eaqual to VCC/2 when in open mode and brake mode.
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
4
QW-R109-020,B
www.unisonic.com.tw
UTC UA8868
APPLICATION CIRCUIT
SERVO
Sled Focus Tracking Vcenter
LINEAR INTEGRATED CIRCUIT
U-COM
Spindle
FWD
REV
MUTE
Tray voltage control SERVO
SPIN+
SPI N-
Tracking coil M
5V or 12V
28 27 26 25 24 23 22
21 20 19 18 17 16 15
UTC UA8868
1
2
3
4
5
SE RV O
6
7
12 V
8
9
M
10 11 12 13 14
M Focus coil
SPIN+
UTC
UNISONIC TECHNOLOGIES
SPIN-
CO., LTD.
5
QW-R109-020,B
www.unisonic.com.tw
UTC UA8868
TESTING CIRCUIT
V28 V27 V26 V25 V24 V23
LINEAR INTEGRATED CIRCUIT
V20 V19
V
8
10
OPEN 28 27 26 25 24 23 22 21 20 19 18 17 16 15
UTC UA8868
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V
V1
V2
V3
V4 V5
V6
V7
V8
45
8
10
U T C a ssu m e s n o re sp o n s ib ility f o r e q u ip m e n t f a ilu re s th a t re s u lt f ro m u sin g p ro d u c ts a t v a lu e s th a t e x c e e d , e v e n m o m e n ta rily , ra te d v a lu e s (su c h a s m a x im u m ra tin g s, o p e ra tin g c o n d itio n ra n g e s , o r o th e r p a ra m e te rs) lis te d in p ro d u c ts sp e c if ic a tio n s o f a n y a n d a ll U T C p ro d u c ts d e sc rib e d o r c o n ta in e d h e re in . U T C p ro d u c ts a re n o t d e sig n e d f o r u se in lif e su p p o rt a p p lia n c e s, d e v ic e s o r sy ste m s w h e re m a lf u n c tio n o f th e se p ro d u c ts c a n b e re a s o n a b ly e x p e c te d to re su lt in p e rso n a l in ju ry . R e p ro d u c tio n in w h o le o r in p a rt is p ro h ib ite d w ith o u t th e p rio r w ritte n c o n se n t o f th e c o p y rig h t o w n e r. T h e in f o rm a tio n p re se n te d in th is d o c u m e n t d o e s n o t f o rm p a rt o f a n y q u o ta tio n o r c o n tra c t, is b e lie v e d to b e a c c u ra te a n d re lia b le a n d m a y b e c h a n g e d w ith o u t n o tic e .
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
6
QW-R109-020,B
www.unisonic.com.tw

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