LV8761V-MPB-E

Ordering number : ENA1172A LV8761V Bi-CMOS LSI Forward/Reverse H-bridge Driver http://onsemi.com Overview The LV8761V 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 • Unusual condition warning output pin • Short-circuit protection circuit selectable from latch-type or auto reset-type Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage Symbol Unit V VCC max 6 V IO peak Output continuous current IO max Allowable power dissipation Ratings 38 Output peak current Logic input voltage Conditions VM max tw ≤ 20ms, duty 5% VIN Pd max Mounted on a specified board. * 4 A 3 A -0.3 to VCC+0.3 V 3.15 W Operating temperature Topr -20 to +85 °C Storage temperature Tstg -55 to +150 °C * Specified circuit board : 90mm×90mm×1.6mm, glass epoxy 2-layer board (2S0P), with backside mounting. Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 May, 2013 30310 SY 20100223-S00008 / 42308 MS PC 20080331-S00003 No.A1172-1/13 LV8761V Allowable Operating Ratings at Ta = 25°C Parameter Supply voltage range Symbol Conditions Ratings Unit VM 9 to 35 VCC 3 to 5.5 V V VREF input voltage VREF 0 to VCC-1.8 V Logic input voltage VIN 0 to VCC V Electrical Characteristics at Ta = 25°C, VM = 24V, VCC = 5V, VREF = 1.5V Parameter Symbol Ratings Conditions min typ Unit max General Standby mode current drain 1 IMst PS = “L” 1 μA Standby mode current drain 2 ICCst PS = “L” 1 μA Operating mode current drain 1 IM PS = “H”, IN1 = “H”, with no load 1 1.3 mA Operating mode current drain 2 ICC PS = “H”, IN1 = “H”, with no load 3 4 mA 5 5.25 VREG output voltage VREG IO = -1mA 4.75 V VCC low-voltage cutoff voltage VthVCC 2.5 2.7 2.9 V Low-voltage hysteresis voltage VthHIS 120 150 180 mV Thermal shutdown temperature TSD Design guarantee * 155 170 185 °C ΔTSD Design guarantee * Ron1 IO = 3A, sink side Ron2 IO = -3A, source side Thermal hysteresis width °C 40 Output block Output on resistance 0.2 0.25 Ω 0.32 0.40 Ω 50 μA Rising time tr 10% to 90% 200 500 ns Falling time tf 90% to 10% 200 500 ns Output leakage current Input output delay time IOleak VO = 35V tpLH IN1 or IN2 to OUTA or OUTB (L → H) 550 700 ns tpHL IN1 or IN2 to OUTA or OUTB (H → L) 550 700 ns 28.7 29.8 V 250 500 μs 140 165 kHz Charge pump block Step-up voltage VGH VM = 24V Rising time tONG VG = 0.1μF Oscillation frequency Fcp 28.0 115 Control system input block Logic pin input current 1 IINL VIN = 0.8V adaptive pin : PS 5.6 8 10.4 μA IINH VIN = 5V adaptive pin : PS 56 80 104 μA IINL VIN = 0.8V adaptive pin : IN1, IN2, EMM 5.6 8 10.4 μA IINH VIN = 5V adaptive pin : IN1, IN2, EMM 35 50 65 μA Logic pin input H-level voltage VINH adaptive pin : PS, IN1, IN2, EMM 2.0 Logic pin input L-level voltage VINL adaptive pin : PS, IN1, IN2, EMM Logic pin input current 2 V 0.8 V Current limiter block VREF input current IREF Current limit comparator Vthlim μA -0.5 VREF = 1.5V 0.285 0.3 0.315 V 3.5 5 6.5 μA 1 1.2 V 0.3 0.4 V threshold voltage Short-circuit protection block SCP pin charge current Iscp Comparator threshold voltage Vthscp EMO output saturation voltage Vemo SCP = 0V 0.8 IO = 500μA * Design guarantee value and no measurement is made. No.A1172-2/13 LV8761V Package Dimensions unit : mm (typ) 3361 SIDE VIEW TOP VIEW BOTTOM VIEW 15.0 36 (3.5) 0.5 5.6 7.6 (4.0) 1 2 0.3 0.8 0.2 0.1 (1.5) SIDE VIEW 1.7 MAX (0.7) SANYO : SSOP36J(275mil) Pin Assignment VCC 1 36 EMM PGND 2 35 SCP 34 VREF NC 4 33 NC NC 5 32 NC OUTB 6 31 NC OUTB 7 30 IN2 RNF 8 29 IN1 RNF 9 VM 10 LV8761V NC 3 28 NC 27 REG5 VM 11 26 CP1 OUTA 12 25 CP2 OUTA 13 24 NC NC 14 23 GND NC 15 22 NC NC 16 21 VG PS 17 20 NC GND 18 19 EMOT Top view No.A1172-3/13 LV8761V Pd max – Ta Allowable power dissipation, Pd max – W 3.5 *1 3.15 *2 2.05 3.0 2.5 2.0 1.64 1.5 1.07 1.0 0.5 *1 With Exposed Die-Pad substrate *2 Without Exposed Die-Pad 0 – 20 0 20 40 60 80 100 Ambient temperature, Ta – °C Substrate Specifications (Substrate recommended for operation of LV8761T) 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.A1172-4/13 GND VCC EMOT PS VREG VG EMM SCP Short-circuit Protection Circuit Oscillation circuit LVS TSD Reference Voltage Circuit Charge pump CP1 CP2 VM OUTA OUTB IN1 IN2 Output control logic M Current Limiter Circuit RNF + + VREF PGND LV8761V Block Diagram Output preamplifier stage Output preamplifier stage + - + - No.A1172-5/13 LV8761V Pin Functions Pin No. Pin Name Pin Functtion 29 IN1 Output control signal input pin 1. 30 IN2 Output control signal input pin 2. 36 EMM Short-circuit protection circuit mode Equivalent Circuit VCC switching pin. 10kΩ 100kΩ GND 17 PS Power save signal input pin. VCC 50kΩ 10kΩ 10kΩ 50kΩ GND 34 VREF Reference voltage input pin for output VCC current limit setting. 500Ω GND 35 SCP Short-circiut protection circuit, detection time setting capacitor connection pin. VCC 500Ω GND 1 VCC Power supply connection pin for control block. Continued on next page. No.A1172-6/13 LV8761V Continued from preceding page. Pin No. Pin Name 10, 11 VM Motor power-supply connection pin. Pin Functtion 12, 13 OUTA OUTA output pin. 8, 9 RNF Current sense resistor connection pin. 6, 7 OUTB OUTB output pin. 2 PGND Power ground. Equivalent Circuit 10 11 REG5 6 7 12 13 500Ω 500Ω 8 9 2 GND 26 CP1 Charge pump capacitor connection pin. 25 CP2 Charge pump capacitor connection pin. 21 VG Charge pump capacitor connection pin. 26 10 11 25 21 100Ω REG5 GND 27 REG5 Internal reference voltage output pin. VM 74kΩ 2kΩ 25kΩ GND 19 EMOT Unusual condition warning output pin. VCC 500Ω GND 18, 23 GND Ground. No.A1172-7/13 LV8761V DC Motor Driver 1.DCM output control logic Contol Input PS IN1 Output IN2 OUTA OUTB Mode L * * OFF OFF Standby 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 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.A1172-8/13 LV8761V Output short-circuit protection function The LV8761V incorporates an output short-circuit protection circuit that turns off the output to prevent the IC from fatal damage when the output is short-circuited due to short-to-power or short-to-ground fault. Either the “latch-type,” in which the output off state is latched when the short-circuit protection circuit is activated, or “auto reset-type,” in which the output on/off states are repeated when the short-circuit protection circuit is activated, can be selected. EMM Pin Short-circuit Protection Mode L Latch type H Auto reset type 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 4μs SCP voltage 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.A1172-9/13 LV8761V 3.Auto Reset Type The sequences up to the detection of an output short-circuit state are identical to those which are explained in Section 1, "Protection Function Operation (Latch Type). After output is turned off on detection of an output short-circuit condition, the internal counter starts counting and repeats turning on and off the output as shown in the figure below. This state continues until the overcurrent state is eliminated. Exceeding the over-current detection current ON OFF Detection current sequences 2ms (TYP) ON OFF ON Output current SCP voltage 4.Unusual Condition Warning Output Pin (EMOT) The LV8761V is provided with the EMOT 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 requires a pull-up resistor when to be used. The EMOT 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. The EMOT pin is set to the OFF state when the relevant protection operation is eliminated. No.A1172-10/13 LV8761V Application Circuit Example (When you use the current limit function) - + 1 VCC EMM 36 2 PGND SCP 35 Control input 100pF 3 NC VREF 34 4 NC NC 33 5 NC NC 32 6 OUTB NC 31 7 OUTB IN2 30 8 RNF IN1 29 Control input M 10 VM - + Control input LV8761V 9 RNF NC 28 REG5 27 11 VM CP1 26 12 OUTA CP2 25 13 OUTA NC 24 14 NC GND 23 15 NC NC 22 16 NC VG 21 17 PS NC 20 18 GND EMOT 19 Monitor 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 No.A1172-11/13 LV8761V (When you do not use the current limit function) - + 1 VCC EMM 36 2 PGND SCP 35 Control input 100pF 3 NC VREF 34 4 NC NC 33 5 NC NC 32 6 OUTB NC 31 7 OUTB IN2 30 8 RNF IN1 29 Control input M 10 VM - + Control input LV8761V 9 RNF NC 28 REG5 27 11 VM CP1 26 12 OUTA CP2 25 13 OUTA NC 24 14 NC GND 23 15 NC NC 22 16 NC VG 21 17 PS NC 20 18 GND EMOT 19 Monitor 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. 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