LV8760T

Ordering number : ENA1157B LV8760T Overview Bi-CMOS LSI Forward/Reverse H-bridge Driver The LV8760T is an H-bridge driver that can control four operation modes (forward, reverse, brake, and standby) of a motor. The low on-resistance, zero standby current, highly efficnet IC is optimal for use in driving brushed DC motors for office equipment. Features • Forward/reverse H-bridge motor driver: 1 channel • Built-in current limiter circuit • Built-in thermal protection circuit • Built-in short-circuit protection function Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage Symbol VM max VCC max Output peak current Output continuous current Logic input voltage Allowable power dissipation Operating temperature Storage temperature IO peak IO max VIN Pd max Topr Tstg Mounted on a specified board. * tw ≤ 20ms, duty 5% Conditions Ratings 38 6 4 3 -0.3 to VCC+0.3 3.3 -20 to +85 -55 to +150 Unit V V A A V W °C °C * Specified circuit board : 90mm×90mm×1.6mm, glass epoxy 2-layer board (2S0P), with backside mounting. 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. 82411 SY 20110808-S00001/22410 SY 20100222-S00002/42308 MS PC 20080319-S00001 No.A1157-1/11 LV8760T Allowable Operating Ratings at Ta = 25°C Parameter Supply voltage range Symbol VM VCC VREF input voltage Logic input voltage VREF VIN Conditions Ratings 9 to 35 3 to 5.5 0 to VCC-1.8 0 to VCC Unit V V V V Electrical Characteristics at Ta = 25°C, VM = 24V, VCC = 5V, VREF = 1.5V Ratings Parameter General Standby mode current drain 1 Standby mode current drain 2 Operating mode current drain 1 Operating mode current drain 2 VREG output voltage VCC low-voltage cutoff voltage Low-voltage hysteresis voltage Thermal shutdown temperature Thermal hysteresis width Output block Output on resistance Ron1 Ron2 Output leakage current Rising time Falling time Input output delay time IOleak tr tf tpLH tpHL Charge pump block Step-up voltage Rising time Oscillation frequency Control system input block Logic pin input current 1 IINL IINH Logic pin input current 2 IINL IINH Logic pin input H-level voltage Logic pin input L-level voltage Current limiter block VREF input current Current limit comparator threshold voltage Blanking time Short-circuit protection block SCP pin charge current Comparator threshold voltage Iscp Vthscp SCP = 0V 3.5 0.8 5 1 6.5 1.2 μA V Tblk 1.6 2.0 2.4 μs IREF Vthlim VREF = 1.5V -0.5 0.285 0.3 0.315 μA V VINH VINL VIN = 0.8V adaptive pin : PS VIN = 5V adaptive pin : PS VIN = 0.8V adaptive pin : IN1, IN2 VIN = 5V adaptive pin : IN1, IN2 adaptive pin : PS, IN1, IN2 adaptive pin : PS, IN1, IN2 5.6 56 5.6 35 2.0 0.8 8 80 8 50 10.4 104 10.4 65 μA μA μA μA V V VGH tONG Fcp VM = 24V VG = 0.1μF 115 28.0 28.7 250 140 29.8 500 165 V μs kHz IO = 3A, sink side IO = -3A, source side VO = 35V 10% to 90% 90% to 10% IN1 or IN2 to OUTA or OUTB (L → H) IN1 or IN2 to OUTA or OUTB (H → L) 200 200 550 550 0.2 0.32 0.25 0.40 50 500 500 700 700 Ω Ω μA ns ns ns ns IMst ICCst IM ICC VREG VthVCC VthHIS TSD ΔTSD Design guarantee * Design guarantee * PS = “L” PS = “L” PS = “H”, IN1 = “H”, with no load PS = “H”, IN1 = “H”, with no load IO = -1mA 4.75 2.5 120 155 1 3 5 2.7 150 170 40 1 1 1.3 4 5.25 2.9 180 185 μA μA mA mA V V mV °C °C Symbol Conditions min typ max Unit * Design guarantee value and no measurement is made. No.A1157-2/11 LV8760T Package Dimensions unit : mm (typ) 3279 TOP VIEW 6.5 20 11 BOTTOM VIEW 4.4 6.4 1 0.65 (0.33) 0.22 10 0.15 0.5 Exposed Die-Pad SIDE VIEW 0.08 1.2max (1.0) SANYO : TSSOP20J(225mil) Pin Assignment PGND 1 OUTB 2 OUTB 3 RNF 4 RNF 5 VM 6 VM 7 OUTA 8 OUTA 9 PS 10 20 VCC 19 SCP 18 VREF 17 IN2 16 IN1 15 REG5 14 CP1 13 CP2 12 VG 11 GND LV8760T No.A1157-3/11 LV8760T Pd max – Ta *1 With Exposed Die-Pad substrate *2 Without Exposed Die-Pad 4.0 Allowable power dissipation, Pd max – W 3.30 3.0 *1 2.0 1.60 *2 1.72 1.0 0.83 0 – 20 0 20 40 60 80 100 Ambient temperature, Ta – °C Substrate Specifications (Substrate recommended for operation of LV8760T) Size : 90mm × 90mm × 1.6mm (two-layer substrate [2S0P]) Material : Glass epoxy Copper wiring density : L1 = 95% / L2 = 95% L1 : Copper wiring pattern diagram L2 : Copper wiring pattern diagram Cautions 1) The data for the case with the Exposed Die-Pad substrate mounted shows the values when 90% or more of the Exposed Die-Pad is wet. 2) 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 3) 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.A1157-4/11 M +- Block Diagram CP1 CP2 VG VM OUTA OUTB RNF Charge pump PGND Output preamplifier stage Output preamplifier stage REG5 Reference Voltage Circuit TSD LVS Output control logic Oscillation circuit + Short-circuit Protection Circuit Current Limiter Circuit + VREF LV8760T PS VCC +SCP GND No.A1157-5/11 IN1 IN2 LV8760T Pin Functions Pin No. 16 17 Pin Name IN1 IN2 Pin Functtion Output control signal input pin 1. Output control signal input pin 2. Equivalent Circuit VCC 10kΩ 100kΩ GND 10 PS Power save signal input pin. VCC 50kΩ 10kΩ 10kΩ 50kΩ GND 18 VREF Reference voltage input pin for output current limit setting. VCC 500Ω GND 19 SCP Short-circiut protection circuit, detection time setting capacitor connection pin. VCC 500Ω GND 20 VCC Power supply connection pin for control block. Continued on next page. No.A1157-6/11 LV8760T Continued from preceding page. Pin No. 6, 7 8, 9 4, 5 2, 3 1 Pin Name VM OUTA RNF OUTB PGND Pin Functtion Motor power-supply connection pin. OUTA output pin. Current sense resistor connection pin. OUTB output pin. Power ground. Equivalent Circuit 67 REG5 8 9 2 3 500Ω 500Ω 1 GND 14 13 12 CP1 CP2 VG Charge pump capacitor connection pin. Charge pump capacitor connection pin. Charge pump capacitor connection pin. 45 14 67 13 12 REG5 100Ω GND 15 REG5 Internal reference voltage output pin. VM 2kΩ 25kΩ GND 11 GND Ground. 74kΩ No.A1157-7/11 LV8760T DC Motor Driver 1.DCM output control logic Contol Input PS L H H H H IN1 * L H L H IN2 * L L H H OUTA OFF OFF H L L Output OUTB OFF OFF L H L Mode Standby Output OFF CW (forward) CCW (reverse) Brake 2.Current limit control timing chart Limit current Output current OUTA OUTB toff CHARGE SLOW Braking operation time in current limit mode can be set by connecting a capacitor between SCP and GND pins. This setting is the same as the time setting required to turn off the outputs when an output short-circuit occurs as explained in the section entitled "Output Short-circuit Protection Function." See "Output Short-circuit Protection Function," for the settinig procedure. 3.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 [Ω]) Assuming VREF = 1.5V, RNF = 0.2Ω, the current limit is : Ilimit = 1.5V/5/0.2Ω = 1.5A No.A1157-8/11 LV8760T Output short-circuit protection function The LV8760T incorporates an output short-circuit protection circuit. It turns the ouputs 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. 1.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 (≈ 4μs), 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 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 PS to L. Output ON H-bridge output state Output ON Output OFF Standby state Threshold voltage SCP voltage 4μs Short-circuit detection state Short- Release circuit Short-circuit Internal counter 1st counter start 1st counter 1st counter stop start 1st counter end 2nd counter start 2nd counter end 2.How to set the SCP pin constant (timer latch-up setting) The user can set the time at which the outputs are turned off when a short-circuit occurs by connecting a capacitor across the SCP and GND pins. The value of the capacitor can be determined by the following formula : Timer latch-up : Tocp Tocp ≈ C × V/I [s] V : Comparator threshold voltage (1V typical) I : SCP charge current (5μA typical) When a capacitor with a capacitance of 50pF is connected across the SCP and GND pins, for example, Tscp is calculated as follows : Tscp = 50pF × 1V/5μA = 10μs No.A1157-9/11 LV8760T Application Circuit Example (When you use the current limit function) 35kΩ 15kΩ 0.1μF 1 2 3 0.22Ω M 10μF -+ 4 5 6 7 8 9 Control input PGND OUTB OUTB RNF RNF VM VM OUTA OUTA VCC 20 SCP 19 100pF VREF 18 IN2 17 Control input IN1 16 REG5 15 CP1 14 CP2 13 VG 12 GND 11 0.1μF 0.1μF 0.1μF +- LV8760T 10 PS Setting the current limit value When VCC = 5V, Vref = 1.5V Ilimit = Vref/5/RNF = 1.5V/5/0.22Ω = 1.36A Setting the current limit regeneration time and short-circuit detection time Tscp ≈ C × V/I = 100pF × 1V/5μA = 20μs PS No.A1157-10/11 LV8760T (When you do not use the current limit function) 1 2 3 4 M -+ 5 6 7 8 9 Control input PGND OUTB OUTB RNF RNF VM VM OUTA OUTA VCC 20 SCP 19 +- 100pF VREF 18 IN2 17 Control input IN1 16 REG5 15 CP1 14 CP2 13 VG 12 GND 11 LV8760T 10 PS Setting at short-circuit state detection time TSCP≒C·V/I =100pF·1V/5µA =20µs *Do the following processing when you do not use the current limit function. · It is short between RNF-GND. · The terminal VREF is hung on suitable potential of VCC or less. 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. 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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 August, 2011. Specifications and information herein are subject to change without notice. PS No.A1157-11/11