Ordering number : ENA1926 LV8762T Bi-CMOS LSI Forward/Reverse H-bridge Driver Overview The LV8762T is an 1ch H-bridge driver that can control four operation modes (forward, reverse, brake, and standby) of a motor. The IC is optimal for use in driving brushed DC motors for office equipment. Features * Forward/reverse H-bridge motor driver: 1 channel * IOmax = 1A * Built-in current limiter * Current limit mask function * Built-in thermal protection circuit * Alert signal output * Single power supply * Built-in short-circuit protection function (selectable from latch-type or auto reset-type). Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Supply voltage VM max Output peak current IO peak Output continuous current IO max Logic input voltage Conditions VEMO Allowable power dissipation Pd max Unit 36 tw 10ms, duty 20% VIN max EMO pin input voltage Ratings Mounted on a specified board. * V 1.5 A 1.0 A -0.3 to +6 V -0.3 to +6 V 1.4 W Operating temperature Topr -20 to +85 C Storage temperature Tstg -55 to +150 C * Specified circuit board : 57mmx57mmx1.6mm, glass epoxy both-type board. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 20911 SY 20110131-S00005 No.A1926-1/13 LV8762T Allowable Operating Ratings at Ta = 25C Parameter Supply voltage range Symbol Conditions Ratings Unit VM 9 to 32 V VREF input voltage VREF 0 to 3 V Logic input voltage VIN 0 to 5.5 V Electrical Characteristics at Ta = 25C, VM = 24V, VREF = 1.5V Parameter Symbol Ratings Conditions min typ Unit max General Standby mode current drain Operating mode current drain REG5 output voltage Thermal shutdown temperature IMst IM VREG ST = "L" ST = "H", IN1 = "H", IN2 = "L", with no load 100 400 A 3 5 mA IO = -1mA 4.5 5 5.5 V 150 180 200 C TSD Design guarantee * TSD Design guarantee * RonU IO = 1A, upper side ON resistance 0.75 0.97 RonD IO = -1A, under side ON resistance 0.5 0.65 Output leakage current IOleak VO = 32V 50 A Diode forward voltage VD Thermal hysteresis width C 40 Output block Output on resistance Rising time Falling time Input output delay time ID = -1A 1.2 1.4 V tr 10% to 90% 100 200 ns tf 90% to 10% 100 200 ns tpLH IN1 to OUTA, IN2 to OUTB (L H) 550 750 ns tpHL IN1 to OUTA, IN2 to OUTB (H L) 550 750 ns Control system input block Logic pin input H-level voltage VINH 2.0 Logic pin input L-level voltage VINL Logic pin input current 1 IINL VIN = 0.8V IINH VIN = 5V V 0.8 V 4 8 12 A 30 50 70 A A VREF input current IREF VREF = 1.5V -0.5 Current limit comparator Vtlim VREF = 1.5V 0.291 0.3 0.309 V ICHOP -6.5 -5 -3.5 A VtCHOP 0.8 1 1.2 V -32.5 -25 -17.5 A 1.2 1.5 1.8 V 27.7 28.7 29.7 V 250 550 s 125 155 kHz 0.4 V threshold voltage CHOP pin charge current CHOP pin threshold voltage CMK pin charge current CMK pin threshold voltage ICMK VtCMK Charge pump block Step-up voltage VGH VM = 24V Rising time tONG VG = 0.1F Oscillation frequency Fcp 90 Short-circuit protection block EMO output saturation voltage SCP pin charge current Comparator threshold voltage VEMO ISCP VtSCP IEMO = 1mA SCP = 0V -6.5 -5 -3.5 A 0.8 1 1.2 V * Design guarantee value and no measurement is made. No.A1926-2/13 LV8762T Package Dimensions unit : mm (typ) 3260A 6.5 0.5 6.4 13 4.4 24 12 1 0.5 0.15 0.22 0.08 1.2max (1.0) (0.5) SANYO : TSSOP24(225mil) Pin Assignment 24 EMO PGND 2 23 CMK OUTB 3 22 SCP OUTB 4 21 CHOP RNF 5 20 VREF RNF 6 VM 7 VM 8 LV8762T EMM 1 19 IN2 18 IN1 17 REG5 OUTA 9 16 CP1 OUTA 10 15 CP2 NC 11 14 VG ST 12 13 GND Top view No.A1926-3/13 LV8762T Pd max - Ta Allowable power dissipation, Pd max - W 2.0 1.5 1.40 1.0 0.73 0.5 0 --20 0 20 40 60 Ambient temperature, Ta - 80 100 C Substrate Specifications (Substrate recommended for operation of LV8762T) Size : 57mm x 57mm x 1.6mm (two-layer substrate) Material : Glass epoxy both-type board L1 : Copper wiring pattern diagram L2 : Copper wiring pattern diagram Cautions 1) For the set design, employ the derating design with sufficient margin. Stresses to be derated include the voltage, current, junction temperature, power loss, and mechanical stresses such as vibration, impact, and tension. Accordingly, the design must ensure these stresses to be as low or small as possible. The guideline for ordinary derating is shown below : (1)Maximum value 80% or less for the voltage rating (2)Maximum value 80% or less for the current rating (3)Maximum value 80% or less for the temperature rating 2) After the set design, be sure to verify the design with the actual product. Confirm the solder joint state and verify also the reliability of solder joint for the Exposed Die-Pad, etc. Any void or deterioration, if observed in the solder joint of these parts, causes deteriorated thermal conduction, possibly resulting in thermal destruction of IC. No.A1926-4/13 LVS TSD Oscillation circuit Reference Voltage Circuit Output preamplifier stage + - SCP CHOP Short-circuit Protection Circuit Brake-Time Setting Circuit VM Output control logic OUTB EMM IN1 IN2 OUTA RNF CMK Current Limiter Mask Current Limiter Circuit Output preamplifier stage GND REG5 ST VG Charge pump CP1 CP2 M + + VREF EMO PGND LV8762T Block Diagram No.A1926-5/13 LV8762T Pin Functions Pin No. Pin Name Pin Functtion 18 IN1 Output control signal input pin 1. 19 IN2 Output control signal input pin 2. 1 EMM Short protection mode setting. Equivalent Circuit VREG5 19 18 1 GND 12 ST Standby mode setting VREG5 12 GND 9, 10 OUTA OUTA output pin. 3, 4 OUTB OUTB output pin. 7, 8 VM Motor power-supply connection pin. 5, 6 RNF Current sense resistor connection pin. PGND Power ground. 2 7 8 9 10 3 4 2 5 6 GND 14 VG Charge pump capacitor connection pin. 8 VM Motor power-supply connection pin. 16 CP1 Charge pump capacitor connection pin. 15 CP2 Charge pump capacitor connection pin. VREG5 16 8 15 14 GND Continued on next page. No.A1926-6/13 LV8762T Continued from preceding page. Pin No. 20 Pin Name VREF Pin Functtion Reference voltage input pin for output current limit setting. Equivalent Circuit VREG5 20 GND 17 REG5 Internal reference voltage output pin. VM 17 GND 24 EMO Alert signal output VREG5 24 GND 21 CHOP Capacitor connection for current limit VREG5 break time setting 22 SCP Capacitor connection for short detection time setting GND 21 22 23 CMK Capacitor connection for current limit mask setting VREG5 23 GND No.A1926-7/13 LV8762T DC Motor Driver 1.Standby function This is can switch the standby - operation mode by setting the ST pin. On standby-mode, all logic circuit is reset, internal regurator is off, internal charge-pump is off. ST "L" or OPEN "H" mode 5V regurator charge pump standby mode standby standby operation mode on on 2.DCM output control logic Contol Input Output Mode ST IN1 IN2 OUTA OUTB L * * OFF OFF H L L OFF OFF Output OFF H H L H L CW (forward) H L H L H CCW (reverse) H H H L L Brake Standby 3.Current limit control timing chart LIMIT current Output current OUTA Tchop OUTB CHARGE SLOW 4. Setting the time of current limit brake value This IC can set the time of the current limit break by connecting the capacitor with CHOP-GND. The value of the capacitor is decided according to the following expression. brake time: TCHOP CCHOP x VtCHOP / ICHOP [sec] VtCHOP:CHOP comparator threshold voltage. TYP=1.0[V] ICHOP:CHOP charge current. TYP=5[A] ex. Cchop=50[pF] Tchop[sec] = 50[pF] x 1.0[V] / 5[A] = 10[s] No.A1926-8/13 LV8762T 5.Setting the current limit value The current limit value of the DCM driver is determined by the VREF voltage and the resistance (RNF) connected across the RNF and GND pins using the following formula : Ilimit [A] (VREF [V] /5) /RNF []) Assuming VREF = 1.5V, RNF = 1, the current limit is : Ilimit = 1.5V/5/1 = 0.3A 6. Setting the mask of current limit CMK mask of current limit "L" no operation "H" or OPEN operation This function can be switched by CMK pin. This function can prevent the current limit from working by the motor start-up current when the current limit value is set low. 7. Setting the time of the mask of current limit This IC can set the time of the mask of current limit by connection the capacitor with CMK-GND. The value of the capacitor is decided according to the following expression. Time of mask:TCMK CCMK x VtCMK / ICMK [sec] VtCMK:CMK comparator threshold voltage. TYP=1.0[V] ICMK:CMK charge current. TYP=25[A] ex. CCMK=0.1[F] TCMK[sec] = 0.1[F] x 1.5[V] / 25[A] = 6[ms] No.A1926-9/13 LV8762T Output short-circuit protection function Thils IC incorporates an output short-circuit protection circuit.It turns the output off to prevent destruction of the IC if a problem such as an output pin being shorted to the motor power supply or ground occurs. Then short-circuit detected, alart signal is assert to EMO pin. 1. Output short protect mode This function can be switched by EMM pin. EMM pin is L or OPEN then latch method, H then auto-retry method. EMM Pin Method "L" or OPEN Latch "H" Auto retry 2.Protection function operation (Latch method) The short-circuit protection circuit is activated when it detects the output short-circuit state. If the short-circuit state continues for the internally preset period ( 2s), the protection circuit turns off the output from which the short-circuit state has been detected. Then it turns the output on again after a lapse of the timer latch time (TSCP) described later. If the short-circuit state is still detected, it changes all the outputs to the standby mode and retains the state. The latched state is released by setting the ST to L. Output ON H bridge Output state Output ON Stand-by state Outout OFF Threshold voltage SCP voltage Short-circuit detection state Shortcircuit Release Short-circuit Internal counter 1st counter start 1st counter stop 1st counter start 1st counter end 2st counter start 2st counter end 3. Protection function operation (Auto retry method) In this mode, short-protection function try repeatedly to detecting short-circuit. The short-circuit detection circuit operates when a short output is detected as well as the latch method. The output is switched to the standby mode when the operation of the short-circuit detection circuit exceeds time (TSCP) of the timer latch, and it returns to the turning on mode again after 2ms(typ). At this time, the switching mode is repeated when is still in the overcurrent mode until the overcurrent mode is made clear. 4.Unusual Condition Warning Output Pin (EMO) The LV8762T is provided with the EMO pin which notifies the CPU of an unusual condition if the protection circuit operates by detecting an abnormal condition of the IC. This pin is of the open-drain output type, and if abnormality is detected, the EMO output becomes (EMO=L) of on. The EMO pin is placed in the ON state when one of the following conditions occurs. 1. Shorting-to-power or shorting-to-ground occurs at the output pin and the output short-circuit protection circuit is activated. 2. The IC junction temperature rises and the thermal protection circuit is activated. No.A1926-10/13 LV8762T 5.Timer latch-up (TSCP) The user can set the time at which the outputs are turned off when a short-circuit occurs by connecting a capacitor (CSCP) across the SCP and GND pins. The value of the capacitor (CSCP) can be determined by the following formula : Timer latch-up : TSCP TSCP CSCP x VtSCP / ISCP [sec] VtSCP : Comparator threshold voltage (1V typical) ISCP : SCP charge current (5A typical) Thermal protection circuit This IC incorporates an thermal protection circuit, and the output is turned off when junction temperature Tj exceeds 180C, and the abnormal state output (EMO pin) is turned on at the same time. The output is driven again when temperature hysteresis falling (automatic restoration). The overheating protection circuit doesn't guarantee protection and the destruction prevention of the set because it becomes operation by the area where ratings Tjmax=150C of the junction temperature were exceeded. TSD = 180C (typical) TSD = 40C (typical) Charge pump This IC makes "H" ST pin, and operate the charge pump circuit, and VG pin voltage step-up VM voltage to VM+REG5 voltage. Use it after the time of tONG or more passes when drives the motor. If it is not so, on-resistance cannot be secured. ST VG pin voltage VM+VREG5 VM+4V VM tONG No.A1926-11/13 LV8762T Application Circuit Example Control input 1 EMM EMO 24 2 PGND CMK 23 3 OUTB SCP 22 4 OUTB CHOP 21 5 RNF VREF 20 Overcurrent detection monitor pin 0.1 F 50pF M 7 VM - + Control input 8 VM LV8762T 6 RNF 50pF Output current setting input IN2 19 Control input IN1 18 REG5 17 9 OUTA CP1 16 10 OUTA CP2 15 11 NC VG 14 12 ST GND 13 Current limit value When VREF = 1.5V, Ilimit = Vref / 5 / RNF = 1.5V / 5 / 1 = 0.3A Setting the current limit regeneration time and short-circuit detection time TSCP CSCP x VtSCP / ISCP = 50pF x 1V / 5A = 10s Setting at current limit mask time TCMK CCMK x VtCMK / ICMK = 0.1F x 1.5V / 25A = 6ms Setting at current limit brake time TCHOP CCHOP x VtCHOP / ICHOP = 50pF x 1V / 5A = 10s * The external part constant is a reference value. No.A1926-12/13 LV8762T SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor 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 Semiconductor Co.,Ltd. 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of February, 2011. Specifications and information herein are subject to change without notice. PS No.A1926-13/13