2961

2961 HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 2961 The UDN2961B and UDN2961W are 3.4 A half bridges designed specifically for driving solenoid printheads, stepper motors, and dc motors. The UDN2961B/W consists of a power source driver output, a power sink driver output, a flyback recovery diode, internal current sensing circuitry, and a user-selectable fixed off-time chopper circuit. The output drivers are capable of sustaining 45 V with continuous currents of ±3.4 A and peak transient currents of ±4 A permitted. The outputs have been optimized for a low output saturation voltage (typically 2.6 V total source plus sink drops at 3.4 A). For output current control, load current is sensed internally and limited by chopping the output driver(s) in a user-selectable fixed offtime PWM mode. The maximum output current is determined by the user’s selection of a reference voltage. The MODE pin determines whether the current control circuitry will chop in a slow current-decay mode (only the source driver switching) or in a fast current-decay mode (source and sink switching). A user-selectable blanking window prevents false triggering of the current control circuitry during chopping. The UDN2961B is supplied in a 16-pin dual in-line plastic batwing package with a copper lead-frame and heat sinkable tabs for improved power dissipation capabilities. For higher power dissipation requirements, the UDN2961W is supplied in a 12-pin single in-line power tab package. Data Sheet 29318.16* HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER—WITH INTERNAL CURRENT SENSING AND CONTROL UDN2961B VREF IN INPUT GROUND GROUND ENABLE RC MODE 1 2 3 4 5 6 7 8 VCC CURRENTCONTROL LOGIC V BB 16 15 14 13 12 11 10 9 SINK OUT EMITTER NC GROUND GROUND LOAD SUPPLY SOURCE OUT LOGIC SUPPLY VBB Dwg. PP-035 ABSOLUTE MAXIMUM RATINGS Supply Voltage, VBB . . . . . . . . . . . . . . 45 V Output Current, IOUT (continuous) . ±3.4 A (tw ≤ 20 µ s, 10% duty cycle) . . ±4.0 A Logic Supply Voltage, VCC . . . . . . . . . 7.0 V Input Voltage Range, VIN . . . . . . . . . . . . . . . -0.3 V to +7.0 V Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . See Graph Operating Temperature Range, TA . . . . . . . . . . . . . . . . -20 °C to +85°C Junction Temperature, TJ . . . . . . . +150°C* Storage Temperature Range, TS . . . . . . . . . . . . . . . -55°C to +150°C Output current rating may be restricted to a value determined by system concerns and factors. These include: system duty cycle and timing, ambient temperature, and use of any heatsinking and/or forced cooling. For reliable operation, the specified maximum junction temperature should not be exceeded. * Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated, but should be avoided. FEATURES s s s s s s s s s 3.4 A, 45 V Source and Sink Drivers Internal Current Sensing User-Selectable Fixed Off-Time PWM Current Control Internal Flyback Diode Low Output Saturation Voltage Chip Enable Fast or Slow Current-Decay Modes Programmable Blanking Window Internal Thermal Shutdown Circuitry Always order by complete part number: Part Number Package UDN2961B UDN2961W 16-Pin DIP 12-Pin Power-Tab SIP 2961 HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 10 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS R SUFFIX 'W', = 2.0°C/W FUNCTIONAL BLOCK DIAGRAM +5 V V VCC R RC ONE SHOT S FLIPFLOP Q R REF θJT 8 SUFFIX 'B', RθJT = 6.0°C/W REF CIRCUIT R CV V BB 2940 Ω 6 + - 4 C SUFFIX 'W', R θJA V SENSE = 38°C/W LOW TRIP 2 SUFFIX 'B', R θJA MODE = 43°C/W SOURCE OUT 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-032A TSD V BB ENABLE SINK OUT INPUT EMITTER GROUND Dwg. FP-019A UDN2961W V BB V BB CURRENTCONTROL LOGIC V CC 1 2 3 4 REF 5 CV 6 7 8 9 10 11 12 LOGIC SUPPLY Dwg. PP-036 115 Northeast Cutoff, Box 15036 W Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1995, 1996 Allegro MicroSystems, Inc. LOAD SUPPLY GROUND SINK OUT INPUT EMITTER ENABLE MODE RC SOURCE OUT V R 2961 HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 45 V, VCC = 4.75 V to 5.25 V, RCV = 2940 Ω (unless otherwise noted). Limits Characteristic Output Drivers Output Leakage Current ICEX VEN = 0.8 V, VSOURCE = 0 V VEN = 0.8 V, VSINK = 45 V Output Saturation Voltage VCE(SAT) Source Driver, IOUT = -3.4 A Source Driver, IOUT = -3.0 A Sink Driver, IOUT = 3.4 A Sink Driver, IOUT = 3.0 A Output Sustaining Voltage Recovery Diode Leakage Current Recovery Diode Forward Voltage Motor Supply Current VCE(sus) IR VF I BB(on) I BB(off) Output Rise Time tr IOUT = ±3.4 A, L = 3 mH VR = 45 V IF = 3.4 A VEN = 2.0 V, VIN = 0.8 V, No Load VEN = 0.8 V Source Driver, IOUT = -3.4 A Sink Driver, IOUT = 3.4 A Output Fall Time tf Source Driver, IOUT = -3.4 A Sink Driver, IOUT = 3.4 A Control Logic Logic Input Voltage VIN(1) VIN(0) Logic Input Current IIN(1) IIN(0) Reference Input Current Transconductance IREF I TRIP/VREF VIN = 5.0 V VIN = 0 V VREF = 5.0 V VREF = 1.0 V VREF = 3.2 V Logic Supply Current ICC VEN = 2.0 V, VIN = 0.8 V, No Load VEN = 0.8 V Turn On Delay tpd(on) Source Driver Sink Driver Turn Off Delay tpd(off) Source Driver Sink Driver Thermal Shutdown Temperature TJ 2.0 — — — — 0.9 0.9 — — — — — — — — — — — — 1.0 1.0 — — — — — — 165 — 0.8 10 -1.0 50 1.1 1.1 160 15 600 600 2.0 2.0 — V V µA mA µA A/V A/V mA mA ns ns µs µs °C — — — — — — 45 — — — — — — — —