View LB11967V_433958.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Ordering number : ENN8362
Monolithic Linear IC
LB11967V
Overview
Bariable Speed Single-Phase Full-Wave Pre-Driver For Fan Motor
The LB11967V is a single-phase bipolar variable speed fan motor predriver that works with an external PWM signal. A highly efficient, quiet and low power consumption motor driver circuit, with a large variable speed, can be implemented by adding a small number of external components. This device is optimal for driving large scale fan motors (with large air volume and large current) such as those used in servers and consumer products.
Functions and Features
* Pre-driver for single-phase full-wave drive PNP-EMOS is used as an external power TR, enabling high-efficiency low-consumption drive by means of the low-saturation output and single-phase full-wave drive. (PMOS-NMOS also applicable) * External PWM input enabling variable speed control Separately-excited upper direct PWM (f = 25kHz) control method, enabling highly silent speed control * Compatible with 12V, 24V, and 48V power supplies * Current limiter circuit incorporated Chopper type current limit at start * Reactive current cut circuit incorporated Reactive current before phase change is cut to enable silent and low-consumption drive. * Minimum speed setting pin Minimum speed can be set with external resistor. The start assistance circuit enables start at extremely low speed. * Constant-voltage output pin for Hall bias * Lock protection and automatic reset functions incorporated * (Rotation speed detection), RD (Lock detection) output
Specitications
Absolute Maximum Ratings at Ta = 25C
Parameter VCC maximum supply voltage OUT pin maximum output current OUT pin output withstand voltage HB maximum output current Symbol VCC max IOUT max VOUT max HB Conditions Ratings 18 50 18 10 Unit V mA V mA
Continued on next page.
81005 SY PC No.8362-1/10
www..com
LB11967V
Continued from preceding page.
Parameter VTH input pin withstand voltage RD/FG output pin output withstand voltage RD/FG output current Allowable power dissipation Operating temperature range Storage temperature range FG max Pd max Topr Tstg Mounted on a specified board* 10 800 -30 to +95 -55 to +150 mA mW C C Symbol VTH max FG max Conditions Ratings 8 18 Unit V V
*Mounted on a specified board (114.3mmx76.1mmx1.6mm, Glass epoxy) Recommended Operating Range at Ta = 25C
Parameter VCC supply voltage VTH input level voltage range Hall input common phase input voltage range Symbol VCC VTH VICM Full speed mode Conditions Ratings 6 to 16 0 to 7 0.2 to 3 Unit V V V
Electrical Characteristics at Ta = 25C, VCC = 12V, unless otherwise specified.
Parameter Circuit current Symbol ICC1 ICC2 6VREG voltage VOVER voltage CPWM-H level voltage CPWM-L level voltage CPWM oscillation frequency CT pin H level voltage CT pin L level voltage ICT pin charge current ICT pin discharge current ICT charge/discharge current ratio OUT-N output voltage OUT-P sink current Hall input sensitivity RD/FG output pin L voltage RD/FG output pin leak current 6VREG VOVER VCRH VCRL FPWM VCTH VCTL ICT1 ICT2 RCT VON IOP VHN VFG IFGL Zero peak value (including offset and hysteresis) IFG = 5mA VFG = 16V 0.15 0.3 30 V A IO = 20mA C = 100pF During drive During lock protection IHB = 5mA Conditions min 6 6 5.80 12.0 4.35 1.45 18 3.4 1.4 1.6 0.16 8 4 15 Ratings typ 10 10 6.0 12.8 4.55 1.65 25 3.6 1.6 2.0 0.20 10 10 20 10 20 max 14 14 6.15 13.6 4.75 1.85 32 3.8 1.8 2.5 0.28 12 mA mA V V V V kHz V V A A deg V mA mV Unit
No.8362-2/10
LB11967V
Package Dimensions
unit : mm 3179C
Truth Table During full-speed rotation
INH L H L IN+ L H L H H CT L OUT1P L OFF OUT1N H H OUT2P L OFF OUT2N H H FG L OFF L OFF OFF RD L Mode OUT1 2 drive OUT2 1 drive Lock protection
VTH L
CPWM H
INH L
IN+ L H L H
OUT1P L OFF -
OUT1N H H
OUT2P L OFF
OUT2N H H -
Mode OUT1 2 drive OUT2 1 drive During rotation Regeneration in lower TR
H
L
H L
No.8362-3/10
LB11967V
Pin Assignment
OUT2P OUT2N VCC VLIM SENSE RMI VTH CPWM FG
1 2 3 4 5
20 OUT1P 19 OUT1N 18 VOVER 17 SGND 16 6VREG
LB11967V
6 7 8 9 15 ROFF 14 CT 13 IN+ 12 HB 11 IN-
RD 10
(Top view)
No.8362-4/10
LB11967V
12V Sample Application Circuit
CB = to 0.022F RB = 10k Vz = 18V ROUT = 100
SOP8901
RF
RFG, RRD = 10k to 100k
VCC VOVER
RD FG
HB 6VREG H IN-
SENSE VLIM
IN+
6VREG
RMI
ROFF
R = 0 to 5k
OUT1P PWM-IN VTH OUT1N CPWM CP = 100pF 25kHz CT = 0.47F CT SGND OUT2P OUT2N
No.8362-5/10
LB11967V
24V, 48V Sample Application Circuit
RF
VCC VOVER
RD FG
HB 6VREG H ININ+
SENSE VLIM
6VREG RMI ROFF
OUT1P PWM-IN VTH OUT1N CPWM CP = 100pF CT CT = 0.47F SGND OUT2P OUT2N
No.8362-6/10
LB11967V
*1. SGND is connected to the control circuit power supply system. *2. For the CM capacitor that is a power stabilization capacitor for PWM drive and for absorption of kick-back, the capacitance of 0.1 to 1F is used. In this IC, the lower TR performs current regeneration by means of switching of upper TR. Connect CM between VCC and GND with the thick pattern and along the shortest route. *3. Be sure to use the zener diode if kick-back causes excessive increase of the supply voltage because such increase damages IC. *4. Wiring need to be short to prevent carrying of the noise. If the noise is carried, insert a capacitor between IN+ and IN-. The Hall input circuit is a comparator having a hysteresis of 20mV. It is recommended that the Hall input level is more than three times (60mVp-p) this hysteresis. *5. With CP = 100pF, oscillation occurs at f = 25kHz and provides the basic frequency of PWM. *6. This is the open collector output, which outputs "L" during rotation and "H" at stop. This output is left open when not used. *7. This is the open collector output, which can detect the rotation speed using the FG output according to the phase shift. This output is left open when not used. *8. This is a Hall element bias pin, that is, the 1.5V constant-voltage output pin. *9. This is the minimum speed setting pin, which is pulled up with 6 VREG when not used. When IC power may possibly be turned OFF first when the pin is used, be sure to insert a current limiting resistor to prevent inflow of the large current. (The same applies to the VTH pin.) *10. This pin sets the soft switching time to cut the reactive current before phase change and is connected to 6 VREG when not used. *11. This pin activates the current limiter when the SENSE pin voltage is higher than the VLIM pin voltage and is connected to 6 VREG when not used. *12. This is connected to GND when not used. *13. This is a pin for constant-voltage bias and should be used for application of 24V and 48V. (Refer to the sample application circuit.) Be sure to use the current limiting resistor. This is left open when not used.
No.8362-7/10
LB11967V
Control timing chart
VTH voltage f = 25kHz (CP = 100pF) RMI voltage CPWM ON-Duty-small 0V 1.65V PWM-IN disconnected Rotation set to minimum speed (Stop mode) VCC PWM control variable speed Low speed High speed 12V Full speed ON-Duty-large 4.55V
0V FG
1
Minimum speed setting (stop) mode PWM-IN input is filtered to generate the VTH voltage. At low speed, the fan rotates with the minimum speed set with RMI pin during low speed. If the minimum speed is not set (RMI = 6VREG), the fan stops. LowHigh speed mode PWM control is made through comparison of oscillation and VTH voltages with CPWM changing between 1.6V4.6V. Upper and lower TRs are turned ON when the VTH voltage is higher. The upper output TR is turned OFF when the VTH voltage is lower, and the coil current is regenerated in the lower TR. Therefore, as the VTH voltage lowers, the output ON-DUTY increases, increasing the coil current and raising the motor speed. The rotation speed is fed back by the FG output. Full speed mode The full-speed mode becomes effective with the VTH voltage of 1.65V or less. (VTH must be equal to GND when the speed control is not to be made.) PWM-IN input disconnection mode When the PWM-IN input pin is disconnected, VTH becomes 1.65V or les and the output enables full drive at 100%. The fan runs at full speed. (Refer to the sample application circuit.)
2
3
4
No.8362-8/10
LB11967V
Block Diagram
No.8362-9/10
LB11967V
n 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.
n 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.
n 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.
n 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, of otherwise, without the prior written permission of SANYO Electric Co., Ltd.
n 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.
n 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 August, 2005. Specifications and information herein are subject to change without notice.
PS No.8362-10/10

▲Up To Search▲

Price & Availability of LB11967V

	To Download LB11967V Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .