UDN2998W

2998 DUAL FULL-BRIDGE MOTOR DRIVER As an interface between low-level logic and solenoids, dc (brush) motors, or stepper motors, the UDN2998W dual full-bridge driver will operate inductive loads up to 50 V with continuous output currents of up to 2 A per bridge or peak (start-up) currents to 3 A. The control inputs are compatible with TTL, DTL, and 5 V CMOS logic. Except for a common supply voltage and thermal shutdown, the two drivers in each package are completely independent. For external PWM control, an Output Enable for each bridge circuit is provided and the sink driver emitters are pinned out for connection to external current-sensing resistors. The chopper drive mode is characterized by low power dissipation levels and maximum efficiency. A PHASE input to each bridge determines load-current direction. Extensive circuit protection is provided on-chip. Both groundclamp and flyback diodes for each bridge are provided. A thermal shutdown circuit disables the load drive if chip temperature rating (package power dissipation) is exceeded. Internally-generated delays provide crossover-current protection. The UDN2998W is packaged in a 12-pin single in-line power-tab package for high power capabilities. Driving either of the bridges at the full 2 A dc rating requires the use of an external heat sink. The tab is at ground potential and needs no insulation. Data Sheet 29319.6B† Dwg. No. W-106 ABSOLUTE MAXIMUM RATINGS at TJ ≤ +150°C Supply Voltage, VBB .......................... 50 V Output Current, IOUT (continuous) ..... ±2 A (peak) ........................................... ±3 A Sink Driver Emitter Voltage, VE ...... 1.5 V Logic Input Voltage Range, VPHASE or VENABLE ....... -0.3 V to 15 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 NOTE: Output current rating may be limited by chopping frequency, ambient temperature, air flow, or heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of +150°C. FEATURES I I I I I I I I ±3 A Peak Output Current Output Voltage to 50 V Integral Output Suppression Diodes Output Current Sensing TTL/CMOS Compatible Inputs Internal Thermal Shutdown Circuitry Crossover-Current Protected Automotive Capable Always order by complete part number: UDN2998W . 2998 DUAL FULL-BRIDGE MOTOR DRIVER FUNCTIONAL BLOCK DIAGRAM (ONE OF TWO DRIVERS) BB Dwg. No. W-107A To maintain isolation between integrated circuit components and to provide for normal transistor operation, the ground tab must be connected to the most negative point in the external circuit. 10 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS RθJT = 2.0°C/W TRUTH TABLE ENABLE INPUT Low Low High High PHASE INPUT High Low High Low OUTPUT 1 High Low Open Low OUTPUT 2 Low High Low Open 8 3.0°C/W HEAT SINK RθJA = 5.0°C/W 6 12°C/W HEAT SINK RθJA = 14°C/W 4 2 FREE AIR, R θJA = 38°C/W 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-012B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1985, 2000 Allegro MicroSystems, Inc. 2998 DUAL FULL-BRIDGE MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VBB = 50 V Limits Characteristic Output Drivers Operating Voltage Range Output Leakage Current VBB ICEX VOUT = 50 V, VENABLE = 2.0 V, Note 2 VOUT = 0, VENABLE = 2.0 V, Note 2 Output Saturation Voltage VCE(SAT) IOUT = 1 A, Sink Driver IOUT = 2 A, Sink Driver IOUT = -1 A, Source Driver IOUT = -2 A, Source Driver Output Sustaining Voltage Source Driver Rise Time Source Driver Fall Time Deadtime Clamp Diode Leakage Current Clamp Diode Forward Voltage Supply Current Control Logic (PHASE or ENABLE) Logic lnput Voltage VIN(0) VIN(1) Logic Input Current IIN(0) IIN(1) Turn-On Delay Time Turn-Off Delay Time tpd0 tpd1 VPHASE or VENABLE = 0.8 V VPHASE or VENABLE = 2.0 V ENABLE Input to Source Drivers ENABLE Input to Source Drivers — 2.0 — — — — — — -5.0