UDQ2917EB

2 91 7 LOGIC SUPPLY DUAL FULL-BRIDGE PWM MOTOR DRIVER The UDN2917EB motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 45 V and include internal pulse-width modulation (PWM) control of the output current to 1.5 A. 39 PWM 1 38 37 1 36 35 34 33 GND Data Sheet 29319.22† SENSE 1 PHASE 1 VREF 1 ENABLE 1 42 OUT 1A OUT 1B θ 1 43 41 RC1 E1 I10 I11 44 GND 7 8 9 10 11 12 13 EN1 VCC 40 6 5 4 3 2 1 For PWM current control, the maximum output current is determined by the user’s selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0, 33%, 67%, or 100% of the maximum level. A PHASE input to each bridge determines load current direction. Activelow ENABLE inputs control the four drivers in each bridge. The bridges include both ground clamp and flyback diodes for protection against inductive transients. Internally generated delays prevent cross-over currents when switching current direction. Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. The UDN2917EB is supplied in a 44-lead power PLCC for surface-mount applications. Its batwing construction provides for maximum package power dissipation in the smallest possible construction. The UDN2917EB is available for operation from -40°C to +85°C. To order, change the prefix from 'UDN' to 'UDQ'. This device is also available on special order for operation to +125°C. 14 15 16 GND 17 VBB 2 32 31 30 29 GND PWM 2 θ2 PHASE 2 26 ENABLE 2 27 EN 2 RC 2 28 E2 19 LOAD SUPPLY 22 OUT 2B 21 OUT 2A 18 SENSE 2 20 V REF 2 25 I20 23 I21 24 Dwg. PP-021 Dwg. PP-021 ABSOLUTE MAXIMUM RATINGS at TJ ≤ +150°C Motor Supply Voltage, VBB .................... 45 V Output Current, IOUT (tw ≤ 20 µs) ..... ±1.75 A (Continuous) ............................... ±1.5 A Logic Supply Voltage, VCC .................... 7.0 V Logic Input Voltage Range, VIN ................................ -0.3 V to +7.0 V Output Emitter Voltage, VE ................... 1.0 V Package Power Dissipation, PD ......................................... See Graph Operating Temperature Range, TA .................................. -20°C to +85°C Storage Temperature Range, TS ................................ -55°C to +150°C Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified peak current rating or a junction temperature of +150°C. FEATURES I 1.5 A Continuous Output Current I 45 V Output Sustaining Voltage I Internal Clamp Diodes I Digital Control of Output Current I Internal Thermal Shutdown Circuitry I Similar to Dual PBL3770 Always order by complete part number: UDN2917EB . 2917 DUAL FULL-BRIDGE PWM MOTOR DRIVER PWM CURRENT-CONTROL CIRCUITRY CHANNEL 1 PIN NUMBERS SHOWN. VBB 22 OUT B 6 3 OUT A V REF 44 20 kΩ ÷10 40 kΩ I0 2 I1 1 10 kΩ RS 5 E SENSE – 4 + ONE SHOT 41 SOURCE DISABLE RC CC RT RC CT Dwg. EP-007-2A ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS TRUTH TABLE 12.5 Enable R θJ Phase H L X OutA H L Z OutB L H Z 10 L L H X = Don’t care Z = High impedance T /W °C =6 7.5 5.0 2.5 R θJA = 3 0° C/W 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-020B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 2000 Allegro MicroSystems, Inc. 2917 DUAL FULL-BRIDGE PWM MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 45 V, VCC = 5.0 V, VREF = 5.0 V (unless otherwise noted). Limits Characteristic Output Drivers (OUTA or OUTB) Motor Supply Range Output Leakage Current VBB ICEX VOUT = VBB VOUT = 0 Output Sustaining Voltage Output Saturation Voltage VCE(sus) VCE(SAT) IOUT = ±1.5 A, L = 3.5 mH Sink Driver, IOUT = +1.0 A* Sink Driver, IOUT = +1.5 A* Source Driver, IOUT = -1.0 A* Source Driver, IOUT = -1.5 A* Clamp Diode Leakage Current Clamp Diode Forward Voltage Driver Supply Current IR VF IBB(ON) IBB(OFF) Control Logic Input Voltage VIN(1) VIN(0) Input Current IIN(1) IIN(0) Reference Voltage Range Current Limit Threshold (at trip point) VREF VREF /VSENSE All Inputs All Inputs VIN = 2.4 V VIN = 0.8 V Operating I0 = I1 = 0.8 V I0 = 2.4 V, I1= 0.8 V I0 = 0.8 V, I1 = 2.4 V Thermal Shutdown Temp. Total Logic Supply Current TJ ICC(ON) ICC(OFF) I0 = I1 = VEN = 0.8 V, No Load I0 = I1 = 2.4 V, No Load 2.4 — — — 1.5 9.5 13.5 25.5 — — — — —