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Part: 2936-120
Category:
Power Management
-> Motor Controller/Drivers
-> DC Motor drivers/Controllers
-> DC Motor Drivers
Description:
Company: Allegro Micro Systems, Inc.
Datasheet: Download 2936-120 datasheet File size : 966 kB
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Datasheet text preview:
2936-120
3-PHASE BRUSHLESS DC MOTOR CONTROLLER / DRIVER
Combining logic and power, the UDN2936W-120 provides commutation and drive for three-phase brushless dc motors. Each of the three outputs are rated at 45 V and ±2 A (±3 A peak), and include internal ground clamp and flyback diodes. The driver also features internal commutation logic, PWM current control, and thermal shutdown protection. The UDN2936W-120 is compatible with single-ended digital or linear Hall effect sensors. The commutating logic is programmed for 120° electrical separation. The UDN2936W-120 can replace the original UDN2936W (60° electrical separation) by simply adding an inverter at the H2 input. Current control is accomplished by sensing current through an external sense resistor and pulse-width modulating the source drivers. Voltage thresholds and hysteresis can be externally set by the user. If desired, internal threshold and hysteresis defaults (300 mV, 7.5 percent) can be used. The UDN2936W-120 also includes braking and direction control. Internal protection circuitry prevents crossover current when braking or changing direction. The UDN2936W-120 is also available for operation between -40°C and +85°C. To order, change the prefix from `UDN' to `UDQ'.
Data Sheet 29318.20B*
ABSOLUTE MAXIMUM RATINGS
at TJ +150°C
Supply Voltage, VBB . . . . . . . . . . . . . . . 45 V Output Current, IOUT (continuous) . . . . . . . . . . . . . . . . ±2.0 A (peak) . . . . . . . . . . . . . . . . . . . . . ±3.0 A Input Voltage Range, VIN . . . -0.3 V to 15 V Threshold Voltage, VTHS . . . . . . . . . . . . 15 V Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . See Graph Operating Temperature Range, TA . . . . . . . . . . . . . . . . -20°C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . . -55°C to +150°C
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.
T C U DD OE R 6S P3 D 39 E UA IN by Td Ne Oc C la IS ep DR
FEATURES
s s s s s s s s
For maximum power-handling capability, the UDN2936W-120 is supplied in 12-pin single in-line power-tab package. An external heat sink may be required for high-current applications. The tab is at ground potential and needs no insulation.
10 V to 45 V Operation ±3 A Peak Output Current Internal Clamp Diodes Internal PWM Current Control 120° Commutation Decoding Logic Thermal Shutdown Protection Compatible with Single-Ended or Differential Hall-Effect Sensors Braking and Direction Control
Always order by complete part number, e.g., UDN2936W-120 .
2936-120
3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
Functional Block Diagram
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1985, 2002 Allegro MicroSystems, Inc.
2936-120 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
10
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
RJT = 2.0°C/W
8
3.0°C/W HEAT SINK RJA = 5.0°C/W
6
12°C/W HEAT SINK RJA = 14°C/W
4
2
FREE AIR, R JA = 38°C/W
0 25 50 75 100 TEMPERATURE IN ° C 125 150
Dwg. GP-012B
Typical Application
Commutation Truth Table
UDN2936W -120
Hall Sensor Inputs H1 High High High Low Low Low High High High Low Low Low X H2 Low Low High High High Low Low Low High High High Low X H3 High Low Low Low High High High Low Low Low High High X DIRECTION Low Low Low Low Low Low High High High High High High X BRAKE High High High High High High High High High High High High Low OUTA Z High High Z Low Low Z Low Low Z High High Low Outputs OUTB Low Low Z High High Z High High Z Low Low Z Low OUTC High Z Low Low Z High Low Z High High Z Low Low
BRAKE
DIR.
V BB
RS = 0.15
X= Irrelevant
V CC
Z = High Impedance Note that the UDN2936W-120 truth table is the same as the original UDN2936W except that the H2 Hall sensor inputs are inverted.
Dwg. EP-033
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ +150°C, VBB = 45 V
Characteristic Supply Voltage Range Supply Current Thermal Shutdown Temp. Thermal Shutdown Hysteresis Output Drivers Output Leakage Current Output Saturation Voltage I CEX VCE(SAT) V OUT = V BB V OUT = 0 V IOUT = -1 A IOUT = +1 A IOUT = -2 A IOUT = +2 A Output Sustaining Voltage Clamp Diode Forward Voltage Clamp Diode Leakage Current Output Switching Time Turn-ON Delay
(Resistive Load)
Symbol V BB I BB TJ TJ
Test Conditions Operating Outputs Open VBRAKE = 0.8 V
Limits Min. Typ. Max. 10 -- -- -- -- -- 32 42 165 25 45 40 50 -- --
Units V mA mA °C °C µA µA V V V V V V µA µs µs µs µs µs µs
-- -- -- -- -- -- 45 -- -- -- -- -- -- -- --
-- -- 1.7 1.1 1.9 1.4 -- 1.8 -- 2.0 2.0 1.25 1.9 1.7 0.9
50 -50 1.9 1.3 2.1 1.6 -- 2.0 50 -- -- -- -- -- --
V CE(sus) VF IR tr tf t on t off
IOUT = ±2 A, L = 2 mH IF = 2 A VR = 45 V IOUT = ±2 A, Resistive Load IOUT = ±2 A, Resistive Load Source Drivers, 0 to -2 A Sink Drivers, 0 to +2 A Source Drivers, -2 A to 0 Sink Drivers, +2 A to 0
Turn-OFF Delay
(Resistive Load)
Continued next page...
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ +150°C, VBB = 45 V continued
Characteristic Control Logic Logic lnput Voltage Sensor lnput Voltage Threshold Input Current V IN(1) V IN(0) VIN IIN(1) VDIR or VBRAKE VDIR or VBRAKE H1, H2, or H3 V DIR = 2 V V BRAKE = 2 V VH = 5 V IIN(0) VDIR = 0.8 V VBRAKE = 0.8 V VH = 0.8 V ITHS VTHS 3.0 V VTHS VTHS / 9.5 Current Limit Threshold Default Sense Trip Voltage Default Hysteresis Deadtime -- VSENSE -- td VTHS / VSENSE at trip point, VTHS < 3.0 V VTHS 3.0 V VTHS 3.0 V BRAKE or DIRECTION 2.0 -- -- -- -- -- -- -- -- -- -- 190 9.5 270 -- -- -- -- 2.5 150 <1.0 35 -5.0 -8.0 -15 250 10 300 7.5 2.0 -- 0.8 -- 200 5.0 50 -20 -15 -30 310 10.5 330 -- -- V V V µA µA µA µA µA mA µA µA µA -- mV % µs Symbol Test Conditions Limits Min. Typ. Max. Units
-190 -220
-0.64 -1.0
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