2962

2962 ALLEGRO

Document overview

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Technical content

Using PWM to minimize power dissipation and maximize load efficiency, the UDN2962W dual driver is recommended for impact printer solenoids and stepper motors. It is comprised of two source/ sink driver pairs rated for continuous operation to ±3 A. It can be connected to drive two independent loads or a single load in the full- bridge configuration. Both drivers include output clamp/flyback diodes, input gain and level shifting, a voltage regulator for single- supply operation, and pulse-width modulated output-current control circuitry. Inputs are compatible with most TTL, DTL, LSTTL, and low-voltage CMOS or PMOS logic. The peak output current and hysteresis for each source/sink pair is set independently. Output current, threshold voltage, and hysteresis are set by the user’s selection of external resistors. At the specified output- current trip level, the source driver turns off. The internal clamp diode then allows current to flow without additional input from the power supply. When the lower current trip point is reached, the source driver turns back on. The UDN2962W is in a 12-pin single in-line power-tab package. The tab is at ground potential and needs no insulation. For high- current or high-frequency applications, external heat sinking may be required.

FEATURES

I 45 V Min. Sustaining Voltage I Internal Clamp Diodes I TTL/PMOS/CMOS Compatible Inputs I High-Speed Chopper Dwg. No. D-1001 2962 DUAL SOLENOID/MOTOR DRIVER —PULSE-WIDTH MODULATED CURRENT CONTROL ABSOLUTE MAXIMUM RATINGS at TJ ≤ +150°C Input Voltage Range, Package Power Dissipation, Operating Temperature Range, Storage Temperature Range, NOTE: 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 and a junction temperature of +150°C. Always order by complete part number: UDN2962W . THS IN SENSE SINK SOURCEB B B B B GROUND INA SENSE A SINK A SOURCEA THSA VCC LOGIC 12 11 10 9 8 7 6 5 4 3 2 1 LOGIC Data Sheet29319.12A†

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000 FUNCTIONAL BLOCK DIAGRAM (ONE OF TWO DRIVERS) Dwg. No. D-1002 TRUTH TABLE SOURCE SINK VIN VSENSE DRIVER DRIVER High NA Off Off Low <V THS/10 On On Low >V THS/10 Off On VCC SOURCE LOAD SINK SENSE RS (TYP.0.1 ) VREF RH RT THS-10 GND IN 50 75 100 125 150 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS TEMPERATURE IN °C R = 2.0°C/W θJT Dwg. GP-012B FREE AIR, R = 38°C/WθJA 3.0°C/W HEAT SINK R = 5.0°C/WθJA 12°C/W HEAT SINK R = 14°C/WθJA W Copyright © 1986, 2000 Allegro MicroSystems, Inc.

www.allegromicro.com ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VCC = 45 V, VSENSE = 0 V (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage Range V CC Operating 20 — 45 V Output Drivers Output Leakage Current I CEX VIN = 2.4 V, VSOURCE = 0 V — <-1.0 -100 µA VIN = 2.4 V, VSINK = 45 V — <1.0 100 µA Output Saturation Voltage V CE(SAT) Source Drivers, I LOAD = 3.0 A — 2.1 2.3 V Source Drivers, I LOAD = 1.0 A — 1.7 2.0 V Sink Drivers, ILOAD = 3.0 A — 1.7 2.0 V Sink Drivers, ILOAD = 1.0 A — 1.1 1.3 V Output Sustaining Voltage V CE(sus) IOUT = ±3.0 A, L = 3.5 mH 45 — — V Output Current Regulation ∆IOUT VTHS = 0.6 V to 1.0 V, L = 3.5 mH — — ±25 % VTHS = 1.0 V to 2.0 V, L = 3.5 mH — — ±10 % VTHS = 2.0 V to 5.0 V, L = 3.5 mH — — ±5.0 % Clamp Diode Forward Voltage V F IF = 3.0 A — 1.7 2.0 V Output Rise Time t r ILOAD = 3.0 A, 10% to 90%, Resistive Load — 0.5 1.0 µs Output Fall Time t f ILOAD = 3.0 A, 90% to 10%, Resistive Load — 0.5 1.0 µs Control Logic Logic Input Voltage V IN(1) 2.4 — — V VIN(0) — — 0.8 V Logic Input Current I IN(1) VIN = 2.4 V — 1.0 10 µA IIN(0) VIN = 0.8 V — -20 -100 µA ITHS(ON) VTHS ≥ 500 mV, VSENSE ≤ VTHS/10.5 — -2.0 — µA ITHS(HYS) VSENSE ≥ VTHS/9.5, VTHS = 0.6 V to 5.0 V 140 200 260 µA VTHS/VSENSE Ratio — At Trip Point, V THS = 2.0 V to 5.0 V 9.5 10 10.5 — Supply Current l CC VIN = 2.4 V, Outputs Off — 8.0 12 mA VIN = 0.8 V, Outputs Open — 25 40 mA Propagation Delay Time t pd 50% VIN to 50% VOUT, Turn Off — — 2.5 µs 50% VIN to 50% VOUT, Turn On — — 3.0 µs 100% VSENSE to 50% VOUT* — — 3.0 µs * Where VSENSE ≥ VTHS/9.5 NOTE: Negative current is defined as coming out of (sourcing) the specified device pin. (Total Device) (Resistive Load)

Worcester, Massachusetts 01615-0036 (508) 853-5000 CIRCUIT DESCRIPTION AND APPLICATIONS INFORMATION The UDN2962W high-current driver is intended for use as a free-running, pulse-width modulated solenoid driver. Circuit Description. In operation, the source and sink drivers are both turned on by a low level at the input. The load current rises with time as a function of the load inductance, total circuit resistance, and supply voltage and is sensed by the external sense resistor (R S). When the load current reaches the trip point (I TRIP), the comparator output goes high and turns off the source driver. The actual load current will peak slightly higher than I TRIP because of the internal logic and switching delays. After the source driver is turned off, the load current continues to circulate through the sink driver and an internal ground clamp diode. The rate of current decay is a function of the load inductance and total circuit resistance. An internal constant current sink reduces the trip point (hysteresis) until the decaying load current reaches the lower threshold, when the comparator output goes low and the source driver is again turned on. Load current is again allowed to rise to the trip point and the cycle repeats. Maximum load current and hysteresis is determined by the user. Determining Maximum Load Current and Hysteresis. Trip current (I TRIP) is determined as a function of resistance R S and the threshold voltage, VTHS: VTHSITRIP = 10 RS where VTHS = 10 x VSENSE = 0.6 V to 5.0 V. Hysteresis percentage (H) is determined by resistance R H and is independent of the load current: RHH = 50 x VREF The chopping frequency is asynchronous and a function of the system and circuit parameters, including load inductance, supply voltage, hysteresis setting, and switching speed of the driver. Resistance R T is determined as: RHVTHSRT = VREF – VTHS Note that if VTHS = VREF, then RT = ∞. Circuit Layout. To prevent interaction between channels, each of the two high-level power ground returns (the low side of the sense resistors) must be returned independ- ently to the low-level signal ground (pin 1). The circuit common (pin 1) can then be routed to the system ground. The printed wiring board should utilize a heavy ground plane. For optimum perform- ance, the driver should be soldered directly into the board. The power supply (V CC) should be decoupled with an electrolytic capacitor (≥10 µF) as close as possible to pin 7. TYPICAL WAVESHAPES VIN VSINK VSOURCE ILOAD VTHS VCC GND VCC I TRIP S THS GND RV 10• Dwg. WP-006 3 7 10 +RS RS SYSTEM GROUND SUPPLY Dwg. OP-001

www.allegromicro.com APPLICATIONS INFORMATION RESISTOR RH VALUE AS A FUNCTION OF HYSTERESIS RESISTOR RT VALUE AS A FUNCTION OF PEAK LOAD CURRENT Dwg. No. A-12,417 Dwg. No. A-12,416 Dwg. No. D-1004 R IN kΩH 20 40 60 80 100 HYSTERESIS, H, IN PERCENT V = 5 VREF NOTE: Each of the drivers includes an internal logic delay to prevent potentially destructive crossover currents within the driver during phase changes. However, never simultaneously enable both inputs in the full- bridge configurations: A destructive short-circuit to ground will result. R H AND RT DETERMINE HYSTERESIS AND PEAK CURRENT R IN kΩT LOAD CURRENT, I , IN AMPERES 0.5 1.5 2.0 MAX H=25% H=20% H=15% H=10% H=5% V = 5VREF SR = 0.1Ω

Worcester, Massachusetts 01615-0036 (508) 853-5000 Dimensions in Inches (controlling dimensions) Dwg. MP-007 in 1.260 1.240 0.775 0.765 0.020 0.155 0.145 ø 0.180 MAX 0.055 0.045 0.135 0.100

0.290 MIN

0.080 0.070 0.365 0.100 ±0.010 0.030 0.020 0.065 0.035 1 0.023 0.018 0.140 0.570 0.540 0.245 0.225 INDEX AREA NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor ’s option within limits shown. 4. Lead gauge plane is 0.030 ” below seating plane. 5. Supplied in standard sticks/tubes of 15 devices.

www.allegromicro.com Dimensions in Millimeters (for reference only) Dwg. MP-007 mm 32.00 31.49 19.69 19.45 0.51 3.94 3.68 ø 4.57 MAX 1.40 1.14 3.43 2.54

7.36 MIN

2.03 1.77 9.27 2.54 ±0.254 0.76 0.51 1.65 0.89 1 0.59 0.45 3.56 14.48 13.71 6.22 5.71 INDEX AREA The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life- support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor ’s option within limits shown. 4. Lead gauge plane is 0.762 mm below seating plane. 5. Supplied in standard sticks/tubes of 15 devices.

Worcester, Massachusetts 01615-0036 (508) 853-5000 MOTOR DRIVERS Function Output Ratings* Part Number † INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS 3-Phase Power MOSFET Controller — 28 V 3933 3-Phase Power MOSFET Controller — 50 V 3932 3-Phase Power MOSFET Controller — 50 V 7600 2-Phase Hall-Effect Sensor/Driver 400 mA 26 V 3626 Bidirectional 3-Phase Back-EMF Controller/Driver ±600 mA 14 V 8906 2-Phase Hall-Effect Sensor/Driver 900 mA 14 V 3625 3-Phase Back-EMF Controller/Driver ±900 mA 14 V 8902–A 3-Phase Controller/Drivers ±2.0 A 45 V 2936 & 2936-120 INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS Dual Full Bridge with Protection & Diagnostics ±500 mA 30 V 3976 PWM Current-Controlled Dual Full Bridge ±650 mA 30 V 3966 PWM Current-Controlled Dual Full Bridge ±650 mA 30 V 3968 PWM Current-Controlled Dual Full Bridge ±750 mA 45 V 2916 PWM Current-Controlled Dual Full Bridge ±750 mA 45 V 2919 PWM Current-Controlled Dual Full Bridge ±750 mA 45 V 6219 PWM Current-Controlled Dual Full Bridge ±800 mA 33 V 3964 PWM Current-Controlled Full Bridge ±1.3 A 50 V 3953 PWM Current-Controlled Dual Full Bridge ±1.5 A 45 V 2917 PWM Current-Controlled Microstepping Full Bridge ±1.5 A 50 V 3955 PWM Current-Controlled Microstepping Full Bridge ±1.5 A 50 V 3957 PWM Current-Controlled Dual DMOS Full Bridge ±1.5 A 50 V 3972 Dual Full-Bridge Driver ±2.0 A 50 V 2998 PWM Current-Controlled Full Bridge ±2.0 A 50 V 3952 DMOS Full Bridge PWM Driver ±2.0 A 50 V 3958 Dual DMOS Full Bridge ±2.5 A 50 V 3971 UNIPOLAR STEPPER MOTOR & OTHER DRIVERS Voice-Coil Motor Driver ±500 mA 6 V 8932–A Voice-Coil Motor Driver ±800 mA 16 V 8958 Unipolar Stepper-Motor Quad Drivers 1 A 46 V 7024 & 7029 Unipolar Microstepper-Motor Quad Driver 1.2 A 46 V 7042 Unipolar Stepper-Motor Translator/Driver 1.25 A 50 V 5804 Unipolar Stepper-Motor Quad Driver 1.8 A 50 V 2540 Unipolar Stepper-Motor Quad Driver 1.8 A 50 V 2544 Unipolar Stepper-Motor Quad Driver 3 A 46 V 7026 Unipolar Microstepper-Motor Quad Driver 3 A 46 V 7044 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output. † Complete part number includes additional characters to indicate operating temperature range and package style. Also, see 3175, 3177, 3235, and 3275 Hall-effect sensors for use with brushless dc motors.