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| 2962 DUAL PWM SOLENOID/MOTOR DRIVER 2962 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 fullbridge 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 highcurrent or high-frequency applications, external heat sinking may be required. Data Sheet 29319.12A* DUAL SOLENOID/MOTOR DRIVER --PULSE-WIDTH MODULATED CURRENT CONTROL GROUND IN A SENSE A SINK A SOURCE A THS A V CC SOURCE B SINK B SENSE B IN B THS B ABSOLUTE MAXIMUM RATINGS at TJ +150C Supply Voltage, VCC . . . . . . . . . . . . . . 45 V Peak Output Current, IOUT . . . . . . . . . 4 A Input Voltage Range, VIN . . . . . . . . . . . . . . . -0.3 V to +7.0 V Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . See Graph Operating Temperature Range, TA . . . . . . . . . . . . . . . . -20C to +85C Storage Temperature Range, TS . . . . . . . . . . . . . . . -55C to +150C 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 +150C. 1 LOGIC 2 3 4 5 6 7 8 9 10 LOGIC 11 12 Dwg. No. D-1001 FEATURES s s s s s 4 A Peak Output 45 V Min. Sustaining Voltage Internal Clamp Diodes TTL/PMOS/CMOS Compatible Inputs High-Speed Chopper Always order by complete part number: UDN2962W . 2962 DUAL PWM SOLENOID/MOTOR DRIVER FUNCTIONAL BLOCK DIAGRAM (ONE OF TWO DRIVERS) VCC SOURCE LOAD SINK IN SENSE GND + _ RS (TYP.0.1 ) VREF RH -10 THS RT Dwg. No. D-1002 10 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS RJT = 2.0C/W TRUTH TABLE VIN VSENSE NA 8 3.0C/W HEAT SINK R = 5.0C/W JA High Low Low 6 12C/W HEAT SINK RJA = 14C/W 4 2 FREE AIR, R JA = 38C/W 0 25 50 75 100 TEMPERATURE IN C 125 150 Dwg. GP-012B 115 Northeast Cutoff, Box 15036 W Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1986, 1993, Allegro MicroSystems, Inc. 2962 DUAL PWM SOLENOID/MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25C, TJ +150C, VCC = 45 V, VSENSE = 0 V (unless otherwise noted). Characteristic Supply Voltage Range Output Drivers Output Leakage Current ICEX VIN = 2.4 V, VSOURCE = 0 V VIN = 2.4 V, VSINK = 45 V Output Saturation Voltage VCE(SAT) Source Drivers, I LOAD = 3.0 A Source Drivers, I LOAD = 1.0 A Sink Drivers, ILOAD = 3.0 A Sink Drivers, ILOAD = 1.0 A Output Sustaining Voltage Output Current Regulation VCE(sus) IOUT IOUT = 3.0 A, L = 3.5 mH VTHS = 0.6 V to 1.0 V, L = 3.5 mH VTHS = 1.0 V to 2.0 V, L = 3.5 mH VTHS = 2.0 V to 5.0 V, L = 3.5 mH Clamp Diode Forward Voltage Output Rise Time Output Fall Time Control Logic Logic Input Voltage VIN(1) VIN(0) Logic Input Current IIN(1) IIN(0) ITHS(ON) ITHS(HYS) VTHS /VSENSE Ratio Supply Current (Total Device) Propagation Delay Time (Resistive Load) -- lCC VIN = 2.4 V VIN = 0.8 V VTHS 500 mV, V SENSE VTHS / 10.5 VSENSE V THS / 9.5, VTHS = 0.6 V to 5.0 V At Trip Point, VTHS = 2.0 V to 5.0 V VIN = 2.4 V, Outputs OFF VIN = 0.8 V, Outputs Open tpd 50% VIN to 50% V OUT, Turn OFF 50% VIN to 50% V OUT, Turn ON 100% VSENSE to 50% V OUT* * Where VSENSE VTHS /9.5 NOTE: Negative current is defined as coming out of (sourcing) the specified device pin. Symbol VCC Operating Test Conditions Min. 20 Limits Typ. Max. -- 45 Units V -- -- -- -- -- -- 45 -- -- -- -- -- -- <-1.0 <1.0 2.1 1.7 1.7 1.1 -- -- -- -- 1.7 0.5 0.5 -100 100 2.3 2.0 2.0 1.3 -- 25 10 5.0 2.0 1.0 1.0 A A V V V V V % % % V s s VF tr tf IF = 3.0 A ILOAD = 3.0 A, 10% to 90%, Resistive Load ILOAD = 3.0 A, 90% to 10%, Resistive Load 2.4 -- -- -- -- 140 9.5 -- -- -- -- -- -- -- 1.0 -20 -2.0 200 10 8.0 25 -- -- -- -- 0.8 10 -100 -- 260 10.5 12 40 2.5 3.0 3.0 V V A A A A -- mA mA s s s 2962 DUAL PWM SOLENOID/MOTOR DRIVER 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 (RS ). When the load current reaches the trip point (ITRIP ), the comparator output goes high and turns OFF the source driver. The actual load current will peak slightly higher than ITRIP 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 (ITRIP) is determined as a function of resistance RS and the threshold voltage, VTHS: ITRIP = V THS 10 RS VIN 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 independently 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 performance, the driver should be soldered directly into the board. The power supply (VCC ) should be decoupled with an electrolytic capacitor (10 F) as close as possible to pin 7. SUPPLY R SYSTEM GROUND S 1 3 7 10 R + S Dwg. OP-001 TYPICAL WAVESHAPES where VTHS = 10 * V SENSE = 0.6 V to 5.0 V. V CC Hysteresis percentage (H) is determined by resistance RH and is independent of the load current: H= RH 50 * 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 RT is determined as: RT = RH VTHS VREF - VTHS V SINK GND V CC VSOURCE GND I TRIP * RS =VTHS 10 I LOAD VTHS Dwg. WP-006 Note that if VTHS = V REF, then RT = . 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2962 DUAL PWM SOLENOID/MOTOR DRIVER APPLICATIONS INFORMATION RESISTOR RH VALUE AS A FUNCTION OF HYSTERESIS 25 RESISTOR RT VALUE AS A FUNCTION OF PEAK LOAD CURRENT 25 20 R H IN k VREF= 5 V R T IN k 20 VREF = 5V RS = 0.1 15 H= 25 % 15 10 10 2 H= 0% 15 H= % 5 5 H=1 0% H=5% 0 0 20 0 60 40 HYSTERESIS, H, IN PERCENT 80 100 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 LOAD CURRENT, IMAX , IN AMPERES Dwg. No. A-12,417 Dwg. No. A-12,416 Dwg. No. D-1004 RH AND RT DETERMINE HYSTERESIS AND PEAK CURRENT 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 fullbridge configurations: A destructive short-circuit to ground will result. 2962 DUAL PWM SOLENOID/MOTOR DRIVER Dimensions in Inches (controlling dimensions) 1.260 1.240 0.020 0.775 0.765 0.245 0.225 0.180 MAX 0.055 0.045 0.155 o 0.145 0.135 0.100 0.140 0.365 0.570 0.540 INDEX AREA 0.290 MIN 1 0.065 0.035 0.030 0.020 12 0.100 0.010 0.023 0.018 0.080 0.070 Dwg. MP-007 in NOTES: 1. 2. 3. 4. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative Exact body and lead configuration at vendor's option within limits shown. Lead gauge plane is 0.030" below seating plane. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2962 DUAL PWM SOLENOID/MOTOR DRIVER Dimensions in Millimeters (for reference only) 32.00 31.49 0.51 19.69 19.45 6.22 5.71 4.57 MAX 1.40 1.14 3.94 o 3.68 3.43 2.54 3.56 9.27 14.48 13.71 INDEX AREA 7.36 MIN 1 1.65 0.89 0.76 0.51 12 2.54 0.254 0.59 0.45 2.03 1.77 Dwg. MP-007 mm NOTES: 1. 2. 3. 4. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative Exact body and lead configuration at vendor's option within limits shown. Lead gauge plane is 0.762 mm below seating plane. 2962 DUAL PWM SOLENOID/MOTOR DRIVER MOTOR DRIVERS SELECTION GUIDE Function Output Ratings * 2.0 A 10 mA 20 mA 20 mA 900 mA 400 mA 300 mA 900 mA 4.0 A 1.0 A 750 mA 1.5 A 750 mA 2.0 A 2.0 A 1.3 A 1.5 A 800 mA 650 mA 750 mA 1.8 A 1.25 A 1A 1.2 A 500 mA 800 mA 350 mA Part Number INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS 3-Phase Controller/Drivers Hall-Effect Latched Sensors 2-Phase Hall-Effect Sensor/Controller Hall-Effect Complementary-Output Sensor 2-Phase Hall-Effect Sensor/Driver 2-Phase Hall-Effect Sensor/Driver Hall-Effect Complementary-Output Sensor/Driver 3-Phase Back-EMF Controller/Driver 3-Phase Controller/DMOS Driver 3-Phase Back-EMF Controller/Driver PWM Current-Controlled Dual Full Bridge PWM Current-Controlled Dual Full Bridges PWM Current-Controlled Dual Full Bridge Dual Full-Bridge Driver PWM Current-Controlled Full Bridge PWM Current-Controlled Full Bridge PWM Current-Controlled Microstepping Full Bridges PWM Current-Controlled Dual Full Bridge PWM Current-Controlled Dual Full Bridge PWM Current-Controlled Dual Full Bridge Unipolar Stepper-Motor Quad Driver Unipolar Stepper-Motor Translator/Driver Unipolar Stepper-Motor Quad Drivers Unipolar Microstepper-Motor Quad Driver Voice-Coil Motor Driver Voice-Coil Motor Driver Voice-Coil (and Spindle) Motor Driver * 45 V 24 V 25 V 25 V 14 V 26 V 60 V 14 V 14 V 7V 45 V 45 V 45 V 50 V 50 V 50 V 50 V 33 V 30 V 45 V 50 V 50 V 46 V 46 V 6V 16 V 7V 2936 and 2936-120 3175 and 3177 3235 3275 3625 3626 5275 8902-A 8925 8984 2916 2917 and 2918 2919 2998 3952 3953 3955 and 3957 3964 3966 and 3968 6219 2544 5804 7024 and 7029 7042 8932-A 8958 8984 INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS OTHER INTEGRATED CIRCUIT & PMCM MOTOR DRIVERS 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. 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 design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 |
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