DUAL FULL-BRIDGE MOTOR DRIVER A2918SWH A2918SWV motor drivers des

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DUAL FULL-BRIDGE MOTOR DRIVER A2918SWH A2918SWV motor drivers des

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OUT1A OUT2A OUT2B LOAD SPLY SENSE
DUAL FULL-BRIDGE MOTOR DRIVER
A2918SWH A2918SWV motor drivers designed drive both windings bipolar stepper motor bidirectionally control motors. bridges capable sustaining include internal pulse-width modulation (PWM) control output current current control, maximum output current determined user's selection reference voltage sensing resistor. PHASE input each bridge determines load current direction. Active ENABLE inputs control four drivers each bridge. bridges include both ground clamp flyback diodes protection against inductive transients. Internally generated delays prevent cross-over currents when switching current direction. Special power-up sequencing required. Thermal protection circuitry disables outputs chip temperature exceeds safe operating limits.
ENABLE2 PHASE2
GROUND LOGIC SPLY
REFERENCE
ABSOLUTE MAXIMUM RATINGS
+150°C
Motor Supply Voltage, Output Current, IOUT (tw20 ±1.75 (Continuous) ±1.5 Logic Supply Voltage, Logic Input Voltage Range, -0.3 +7.0 Output Emitter Voltage, Package Power Dissipation, Graph Operating Temperature Range, -20°C +85°C Storage Temperature Range, -40°C +150°C
Output current rating limited duty cycle, ambient temperature, heat sinking. Under conditions, exceed specified peak current rating junction temperature +150°C.
Data Sheet 29319.24A
PHASE1
ENABLE1
VREF
SENSE1 OUT1B
Dwg. PP-051
A2918SWH/V supplied 18-lead power-tab package with staggered lead forming. internally insulated from device requires external isolation. A2918SWH/V available operation from -40°C +85°C. order, change suffix from 'S-' 'E-'. These devices also available special order operation +125°C.
FEATURES
±1.5 Continuous Output Current Output Sustaining Voltage Internal Current Control Output Saturation Voltage Internal Clamp Diodes Internal Thermal Shutdown Circuitry Similar Dual PBL3718 Dual PBL3770
Always order complete part number: Part Number A2918SWH A2918SWV Application
Horizontal Mount Vertical Mount
DUAL FULL-BRIDGE MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
LOGIC SUPPLY LOAD SUPPLY
PHASE
PHASE
ENABLE1
ENABLE2
SOURCE DISABLE VREF
SOURCE DISABLE
SHOT
SHOT
SENSE
SENSE
REFERENCE
GROUND
Dwg. FP-033
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
TRUTH TABLE
Enable Phase OutA OutB
Don't care High impedance
TEMPERATURE
Dwg. GP-043
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1991, 1993, Allegro MicroSystems, Inc.
DUAL FULL-BRIDGE MOTOR DRIVER
ELECTRICAL CHARACTERISTICS +25°C, 4.75 5.25 VREF (unless otherwise noted).
Limits Characteristic Output Drivers (OUTA OUTB) Motor Supply Range Output Leakage Current ICEX VOUT VOUT Output Sustaining Voltage Output Saturation Voltage VCE(sus) VCE(SAT) IOUT ±1.5 Sink Driver, IOUT +1.0 Sink Driver, IOUT +1.5 Source Driver, IOUT -1.0 Source Driver, IOUT -1.5 Clamp Diode Leakage Current Clamp Diode Forward Voltage Driver Supply Current IBB(ON) IBB(OFF) Control Logic Input Voltage VIN(1) VIN(0) Input Current IIN(1) IIN(0) Reference Voltage Range Current Limit Threshold Thermal Shutdown Temp. Total Logic Supply Current VREF VREF/VSENSE ICC(ON) ICC(OFF) Load Load Inputs Inputs Operating Trip Point <1.0 -3.0 -200 10.5 Both Bridges Load Both Bridges <1.0 <-1.0 <1.0 Symbol Test Conditions Min. Typ. Max. Units
Negative current defined coming (sourcing) specified device pin. Typical Data design information only.
www.allegromicro.com
DUAL FULL-BRIDGE MOTOR DRIVER
OUTPUT CURRENT WAVEFORM APPLICATIONS INFORMATION
Current Control
PHASE
A2918SWH/V dual bridges designed drive both windings bipolar stepper motor. Output current sensed controlled independently each bridge external sense resistor (RS), internal comparator, internal monostable multivibrator. When bridge turned current increases motor winding sensed until sense voltage (VSENSE) reaches level comparator's input: ITRIP VREF/10
Dwg. WM-003-1A
TRIP
comparator then triggers monostable which turns source driver bridge. actual load current peak will slightly higher than trip point (especially low-inductance loads) because internal logic switching delays. This delay (td) typically. After turn-off, motor current decays, circulating through ground clamp diode sink transistor. source driver's time toff, therefore magnitude current decrease, determined monostable's external timing components, where toff RTCT within range When source driver re-enabled, winding current (the sense voltage) again allowed rise comparator's threshold. This cycle repeats itself, maintaining average motor winding current desired level. Special circuitry been included prevent runaway current control when toff short. This circuitry prevents source driver from being re-enabled until load current decayed below ITRIP level. Loads with high distributed capacitances result high turn-ON current peaks. This peak, appearing across will attempt trip comparator, resulting possible erroneous current control high-frequency oscillations. external RCCC low-pass filter used delay action comparator, thus ignore turn-on spikes.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
DUAL FULL-BRIDGE MOTOR DRIVER
General avoid excessive voltage spikes LOAD SUPPLY (VBB), large-value capacitor should connected from ground close possible device. Under circumstances should voltage exceed PHASE input each bridge determines direction motor winding current flows. internally generated deadtime, approximately prevents crossover currents that occur when switching PHASE input. four drivers bridge output turned OFF, with 2.4, resulting fast current decay through internal ground clamp flyback diodes. fast current decay desirable half-step high-speed applications. ENABLE input must tied used. Varying reference voltage (VREF) provides continuous control peak load current. Thermal protection circuitry turns drivers when junction temperature reaches approximately +170°C. intended only protect device from failures excessive junction temperature should imply that output short circuits permitted. output drivers re-enabled when junction temperature cools approximately +145°C.
LOAD CURRENT PATHS
BRIDGE SOURCE
Dwg. EP-006-1
products described here manufactured Japan Sanken Electric Co., Ltd. sale Allegro MicroSystems, Inc. Sanken Electric Co., Ltd. Allegro MicroSystems, Inc. reserve right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability their products. Therefore, user cautioned verify that information this publication current before placing order. These products authorized critical components life-support appliances, devices, systems without express written approval. information included herein believed accurate reliable. However, Sanken Electric Co., Ltd. Allegro MicroSystems, Inc. assume responsibility use; infringements patents other rights third parties which result from use.
www.allegromicro.com
DUAL FULL-BRIDGE MOTOR DRIVER
A2918SWH horizontal mounting
Dimensions Inches (for reference only)
1.228 1.213 0.968 0.953 0.653 0.638
0.196 0.182 0.126 0.150 0.070 0.063
0.131
0.120
0.637 0.623
0.397 0.382 0.204 0.158
0.519 0.504
0.141 0.095 0.022
1.240 1.225
0.091 0.083 0.260 0.213 0.318 0.272
0.086 0.040
0.033 0.022
0.066 ±0.016
Dimensions Millimeters (controlling dimensions)
31.2 30.8 3.35 3.05 24.6 24.2 16.6 16.2
Dwg. MP-006
16.2 15.8
10.1
13.2 12.8
0.57 0.54
31.5 31.1
0.85 0.55
1.68 ±0.4
Dwg. MP-006
NOTES: Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
DUAL FULL-BRIDGE MOTOR DRIVER
A2918SWV vertical mounting
Dimensions Inches (for reference only)
1.228 1.213 0.968 0.953 0.131 0.120 0.653 0.638 0.196 0.182 0.126 0.150 0.070 0.063
0.637 0.623
0.397 0.382
0.519 0.283 0.504 0.245 0.421 0.363 0.104 0.089
0.033 0.022
0.066 ±0.027 1.240 1.225
0.022 0.185 0.130
Dwg. MP-004
Dimensions Millimeters (controlling dimensions)
31.2 30.8 24.6 24.2 3.35 3.05 16.6 16.2
16.2 15.8
10.1
13.2 12.8
2.65 2.25
10.7 0.85 0.55
1.68 ±0.7 31.5 31.1
0.57 0.54
Dwg. MP-004
NOTES: Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative.
www.allegromicro.com
DUAL FULL-BRIDGE MOTOR DRIVER
MOTOR DRIVERS
Output Ratings* Part Number INTEGRATED CIRCUITS BRUSHLESS MOTORS 3-Phase Power MOSFET Controller 3933 3-Phase Power MOSFET Controller 3932 3-Phase Power MOSFET Controller 7600 2-Phase Hall-Effect Sensor/Driver 3626 Bidirectional 3-Phase Back-EMF Controller/Driver ±600 8906 2-Phase Hall-Effect Sensor/Driver 3625 3-Phase Back-EMF Controller/Driver ±900 8902-A 3-Phase Controller/Drivers ±2.0 2936 2936-120 INTEGRATED BRIDGE DRIVERS BIPOLAR STEPPER MOTORS Dual Full Bridge with Protection Diagnostics ±500 3976 Current-Controlled Dual Full Bridge ±650 3966 Current-Controlled Dual Full Bridge ±650 3968 Current-Controlled Dual Full Bridge ±750 2916 Current-Controlled Dual Full Bridge ±750 2919 Current-Controlled Dual Full Bridge ±750 6219 Current-Controlled Dual Full Bridge ±800 3964 Current-Controlled Full Bridge ±1.3 3953 Current-Controlled Dual Full Bridge ±1.5 2917 Current-Controlled Microstepping Full Bridge ±1.5 3955 Current-Controlled Microstepping Full Bridge ±1.5 3957 Current-Controlled Dual DMOS Full Bridge ±1.5 3972 Dual Full-Bridge Driver ±2.0 2998 Current-Controlled Full Bridge ±2.0 3952 DMOS Full Bridge Driver ±2.0 3958 Dual DMOS Full Bridge ±2.5 3971 UNIPOLAR STEPPER MOTOR OTHER DRIVERS Voice-Coil Motor Driver ±500 8932-A Voice-Coil Motor Driver ±800 8958 Unipolar Stepper-Motor Quad Drivers 7024 7029 Unipolar Microstepper-Motor Quad Driver 7042 Unipolar Stepper-Motor Translator/Driver 1.25 5804 Unipolar Stepper-Motor Quad Driver 2540 Unipolar Stepper-Motor Quad Driver 2544 Unipolar Stepper-Motor Quad Driver 7026 Unipolar Microstepper-Motor Quad Driver 7044 Function Current maximum specified test condition, voltage maximum rating. specification sustaining voltage limits over-current protection voltage limits. Negative current defined coming (sourcing) output. Complete part number includes additional characters indicate operating temperature range package style. Also, 3175, 3177, 3235, 3275 Hall-effect sensors with brushless motors.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

DUAL FULL-BRIDGE MOTOR DRIVER A2918SWH A2918SWV motor drivers des

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