Combining logic power, UDN2936W-120 provides commutation drive three-p

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Combining logic power, UDN2936W-120 provides commutation drive three-p

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2936-120
Combining logic power, UDN2936W-120 provides commutation drive three-phase brushless motors. Each three outputs rated peak), include internal ground clamp flyback diodes. driver also features internal commutation logic, current control, thermal shutdown protection.
3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
UDN2936W-120 compatible with single-ended digital linear Hall effect sensors. commutating logic programmed 120° electrical separation. UDN2936W-120 replace original UDN2936W (60° electrical separation) simply adding inverter input. Current control accomplished sensing current through external sense resistor pulse-width modulating source drivers. Voltage thresholds hysteresis externally user. desired, internal threshold hysteresis defaults (300 percent) used. UDN2936W-120 also includes braking direction control. Internal protection circuitry prevents crossover current when braking changing direction. UDN2936W-120 also available operation between -40°C +85°C. order, change prefix from `UDN' `UDQ'. maximum power-handling capability, UDN2936W-120 supplied 12-pin single in-line power-tab package. external heat sink required high-current applications. ground potential needs insulation.
Data Sheet 29318.20B
ABSOLUTE MAXIMUM RATINGS
+150°C
Supply Voltage, Output Current, IOUT (continuous) ±2.0 (peak) ±3.0 Input Voltage Range, -0.3 Threshold Voltage, VTHS Package Power Dissipation, Graph Operating Temperature Range, -20°C +85°C Storage Temperature Range, -55°C +150°C
Note: Output current rating limited duty cycle, ambient temperature, heat sinking. Under conditions, exceed specified peak current junction temperature +150°C.
FEATURES
Operation Peak Output Current Internal Clamp Diodes Internal Current Control 120° Commutation Decoding Logic Thermal Shutdown Protection Compatible with Single-Ended Differential Hall-Effect Sensors Braking Direction Control
Always order complete part number, e.g., UDN2936W-120
2936-120
3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
Functional Block Diagram
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1985, 2000 Allegro MicroSystems, Inc.
2936-120 3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
2.0°C/W
3.0°C/W HEAT SINK 5.0°C/W
12°C/W HEAT SINK 14°C/W
FREE AIR, 38°C/W
TEMPERATURE
Dwg. GP-012B
Typical Application
Commutation Truth Table
UDN2936W-120
Hall Sensor Inputs High High High High High High High High High High High High High High High High High High DIRECTION High High High High High High BRAKE High High High High High High High High High High High High OUTA High High High High Outputs OUTB High High High High OUTC High High High High
BRAKE
DIR.
0.15
Irrelevant
High Impedance Note that UDN2936W-120 truth table same original UDN2936W except that Hall sensor inputs inverted.
Dwg. EP-033
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS +25°C, +150°C,
Characteristic Supply Voltage Range Supply Current Thermal Shutdown Temp. Thermal Shutdown Hysteresis Output Drivers Output Leakage Current Output Saturation Voltage ICEX VCE(SAT) VOUT VOUT IOUT IOUT IOUT IOUT Output Sustaining Voltage Clamp Diode Forward Voltage Clamp Diode Leakage Current Output Switching Time Turn-ON Delay
(Resistive Load)
Symbol
Test Conditions Operating Outputs Open VBRAKE
Limits Min. Typ. Max.
Units
1.25
VCE(sus) toff
IOUT IOUT Resistive Load IOUT Resistive Load Source Drivers, Sink Drivers, Source Drivers, Sink Drivers,
Turn-OFF Delay
(Resistive Load)
Continued next page.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120 3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS +25°C, +150°C, continued
Characteristic Control Logic Logic lnput Voltage Sensor lnput Voltage Threshold Input Current VIN(1) VIN(0) IIN(1) VDIR VBRAKE VDIR VBRAKE VDIR VBRAKE IIN(0) VDIR VBRAKE ITHS VTHS VTHS VSENSE VTHS/10.5 VTHS VSENSE VTHS Current Limit Threshold Default Sense Trip Voltage Default Hysteresis Deadtime VSENSE VTHS VSENSE trip point, VTHS VTHS VTHS BRAKE DIRECTION <1.0 -5.0 -8.0 10.5 Symbol Test Conditions Limits Min. Typ. Max. Units
-190 -220
-0.64 -1.0
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
APPLICATIONS INFORMATION
UDN2936W-120 power driver provides commutation logic power outputs drive three-phase brushless motors. UDN2936W-120 designed interface with singleended linear digital Hall-effect devices (HEDs). Internal pull-up resistors allow direct with open-collector digital HEDs. inputs have thresholds. commutation logic provides decoding HEDs with 120° electrical separation. step logic sequencing, half-bridge driver sourcing current, driver sinking current, driver high-impedance state (see Truth Table). logic BRAKE turns three sink drivers turns three source drivers, essentially shorting motor windings ground. During braking, back-electromotive force generated motor produces current that dynamically brakes motor. Depending upon rotational velocity motor, this current approach locked rotor current level (which limited only motor winding resistance). During braking, output currentlimiting circuitry disabled care should taken ensure that back-EMF generated brake current does exceed maximum rating peak) sink drivers ground clamp diodes. Changing logic level DIRECTION inverts output states, thus reversing direction motor. Changing direction rotating motor produces back-EMF current similar when braking motor. load current should allowed exceed maximum rating peak) drivers. internally generated dead time (td) approximately prevents potentially destructive crossover currents that occur when changing direction braking. Motor current internally controlled pulse-width modulating source drivers with preset hysteresis format. Load current through external sense resistor (RS) constantly monitored. When current reaches trip point (determined external reference voltage internal default), source driver disabled. Current recirculates through ground clamp diode, motor winding, sink driver. internal constant-current sink reduces trip point (hysteresis). When decaying current reaches this lower threshold, source driver enabled again cycle repeats. Thresholds hysteresis with external resistors, internal defaults used. With VTHS trip point internally with 7.5% hysteresis. Load current then determined equation: ITRIP With VTHS threshold, hysteresis percentage, peak current with external resistors according equations: threshold voltage (VTHS) VREF /(RH hysteresis percentage VREF load trip current TRIP) VTHS Percentage hysteresis fixed value independent load current. chopping frequency function circuit parameters including load inductance, load resistance, supply voltage, hysteresis, switching speed drivers. UDN2936W-120 outputs rated normal operating currents startup currents (see cautions above regarding braking changing motor direction). Internal power ground-clamp flyback diodes protect outputs from voltage transients that occur when switching inductive loads. devices also feature thermal protection circuitry. junction temperature reaches +165°C, thermal shutdown circuitry turns output drivers. outputs re-enabled when junction cools down approximately +140°C. This protection only intended protect device from failures excessive junction temperature loss heat sinking should imply that output short circuits permitted. with high-power integrated circuits, printed wiring board should utilize heavy ground plane. optimum performance, drivers should soldered directly into board. power supply should decoupled with electrolytic capacitor (>10 close possible device supply (VBB Replacing UDN2936W. original UDN2936W easily replaced with UDN2936W-120 inserting inverter (two resistors 2N3904 2N2222) between Hall sensor UDN2936W-120, shown figure next page. extra inverter available, certain that pull-up Hall sensor provided.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120 3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
DIRECTION
OUTB
OUTC
Dwg. WM-002-1
Replacing original UDN2936W
Typical Hall-Effect Sensor Locations
UDN2936W-120 +6.8
SENSOR
+2.5
www.allegromicro.com
2N2222 2N3904
Dwg. EP-071
Dwg. W-193
2936-120
3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
Dimensions Inches
(controlling dimensions)
1.260 1.240 0.020 0.775 0.765 0.245 0.225
0.180
0.055 0.045 0.155 0.145 0.135 0.100
0.140 0.365 0.570 0.540
INDEX AREA
0.290
0.065 0.035
0.030 0.020
0.100
±0.010
0.023 0.018
0.080 0.070
Dwg. MP-007
NOTES: Lead thickness measured seating plane below. Lead spacing tolerance non-cumulative Exact body lead configuration vendor's option within limits shown. Lead gauge plane 0.030" below seating plane. Supplied standard sticks/tubes devices.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120 3-PHASE BRUSHLESS MOTOR CONTROLLER/DRIVER
Dimensions Millimeters
(for reference only)
32.00 31.49 0.51 19.69 19.45 6.22 5.71
4.57
1.40 1.14 3.94 3.68 3.43 2.54
3.56 9.27 14.48 13.71
INDEX AREA
7.36
1.65 0.89
0.76 0.51
2.54
±0.254
0.59 0.45
2.03 1.77
Dwg. MP-007
products described here manufactured under more U.S. patents U.S. patents pending. Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Before placing order, user cautioned verify that information being relied upon current. Allegro products authorized critical components life-support devices systems without express written approval. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringement patents other rights third parties which result from use.
NOTES: Lead thickness measured seating plane below. Lead spacing tolerance non-cumulative Exact body lead configuration vendor's option within limits shown. Lead gauge plane 0.762 below seating plane. Supplied standard sticks/tubes devices.
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS MOTOR CONTROLLER/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/Driver ±2.0 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 Dual DMOS Full Bridge ±1.0 3973 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

Combining logic power, UDN2936W-120 provides commutation drive three-p

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