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Details, datasheet, quote on part number:3932
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| Part: | 3932 |
| Category: | Power Management => Motor Controller/Drivers => DC Motor drivers/Controllers => DC Motor Drivers |
| Description: | Three Phase Power MOSFET Controller |
| Company: | Allegro Micro Systems, Inc. |
| Datasheet: | Download 3932 datasheet File size : 149 kB |
| Request For quote: | Find where to buy 3932
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Datasheet text preview:
3932
PRELIMINARY INFORMATION
(Subject to change without notice) January 15, 2003
RESET PGND AGND GLC DEAD REF SC
THREE-PHASE POWER MOSFET CONTROLLER
The A3932SEQ is a three-phase MOSFET controller for use with bipolar brushless dc motors. Its high gate-current drive capability allows driving a wide range of n-channel power MOSFETs and can support motor supply voltages to 50 V. Bootstrapped high-side drive blocks provide the floating positive supplies for the gate drive and minimize the component count normally required. The high-side circuitry also employs a unique FET monitoring circuit that ensures the gate voltages are at the proper levels before turn-on and during the ON cycle. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. The peak loadcurrent limit is set by the user's selection of an input reference voltage and external sensing resistor. The fixed off-time pulse duration is set by a user-selected external RC timing network. For added flexibility, the PWM input can be used to provide speed/torque control, allowing the internal current control circuit to set the maximum current limit.
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Data Sheet 26301.101
32
31
30
3
4
2
1
GHC CC GLB SB GHB CB GLA SA GHA
5 6 7 8 9 10 11 12 13
29 28 27 26 25 24
SENSE RC PWM TACH SR BRAKE DIR H2 H3
CONTROL LOGIC
23 19 22 21
14
17
FAULT 18
VBB 19
VREG 15
LCAP 16
FAULT
MODE
CA
H1 20
Dwg. PP-068-1
FEATURES AND BENEFITS
s s s s s s s s s s s s s s s s Drives Wide Range of N-Channel MOSFETs Synchronous Rectification Power MOSFET Protection Adjustable Dead Time for Cross-Conduction Protection 100% Duty Cycle Operation Selectable Fast or Slow Current-Decay Modes Internal PWM Peak Current Control High-Current Gate Drive Motor Lead Short-to-Ground Protection Internal 5-V Regulator Brake Input PWM Torque-Control Input Fault-Diagnostic Output Tachometer Output Thermal Shutdown Undervoltage Protection
ABSOLUTE MAXIMUM RATINGS at TA = 25°C
Supply Voltage, VBB ..... 50 V Peak Regulator Voltage, VREG ..... 15 V Logic Input Voltage Range, VIN ......... -0.3 V to VLCAP + 0.3 V Sense Voltage Range, VSENSE ..... -5 V to +1.5 V Output Voltage Range, VSA, VSB, VSC ......... -5 V to +50 V VGHA, VGHB, VGHC . -5 V to VBB + 17 V VCA, VCB, VCC ............ VSX + 17 V Operating Temperature Range, TA ......... -20°C to +85°C Junction Temperature, TJ ........ +150°C Storage Temperature Range, TS ....... -55°C to +150°C
Always order by complete part number: A3932SEQ .
3932 THREE-PHASE POWER MOSFET CONTROLLER
Functional Block Diagram
+V
VBB LCAP 5V VREG + UNDERVOLTAGE DETECT CHARGE PUMP CX Cboot TURN-ON DELAY O.D. CONTROL LOGIC SX DRIVER PROTECTION LOGIC
1 OF 3 HIGH-SIDE DRIVERS
+
REGULATOR 50 k (9)
H1 H2 H3 TACH BRAKE DIR RESET MODE PWM SR RC RT CT RC BLANKING
(FIXED OFF TIME)
HIGH-SIDE DRIVER
GHX
TO 1 OF 3 MOTOR PHASES TO LCAP
DEAD-TIME ADJUST
DEAD
TURN-ON DELAY
1 OF 3 LOW-SIDE DRIVERS
LOW-SIDE DRIVER
GLX
PGND
RS
REF
SHORT-TO-GROUND TSD INVALID HALL VREG UNDERVOLTAGE
+
O.D.
FAULT AGND
TO LCAP
SENSE
Dwg. FP-045-1
Optional synchronous rectification is included. This feature will short out the current path through the power MOSFETs' reverse body diodes during the PWM offcycle current decay. This can minimize power dissipation in the power MOSFETs, eliminate the need for external power clamp diodes, and potentially allow a more economical choice for the MOSFET drivers. The A3932 includes the commutation logic for Hall sensors configured for 120 degree spacing. Power MOSFET protection features include bootstrap capacitor charging current monitor, undervoltage monitor, motorlead short-to-ground, and thermal shutdown. The `S' part-number suffix indicates an operating temperature range of -20°C to +85°C. The `EQ' suffix indicates a 32-lead rectangular (9 x 7) plastic chip carrier (quad pack) for minimum-area, surface-mount applications.
NOTE -- For 12 V applications, VBB is shorted to VREG. The VREG absolute maximum rating (15 V) must not be exceeded.
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2002, 2003 Allegro MicroSystems, Inc.
3932 THREE-PHASE POWER MOSFET CONTROLLER
ELECTRICAL CHARACTERISTICS: unless otherwise noted at TA = 25°C; VBB = 18 V to 50 V; CLCAP, Cboot = 0.1 µF; CREG = 10 µF; Cload = 3300 pF; fPWM = 22.5 kHz Square Wave; Two Phases Active. Limits Typ Max
5.0 13 25 40 8.0 5.25 13.2 13.6 0.8 1.8 -90 -130 12.8 7.6 150
Parameter Supply Current
Quiescent Current Reference Voltage Output Voltage Output Voltage Regulation
Symbol
I BB V LCAP V REG VREG(IREG) VREG(VBB)
Conditions
RESET high, coast mode, stopped ILCAP = -3 mA VBB = VREG 15 V, IREG = -10 mA 18 V VBB 50 V, IREG = -10 mA IREG = -1 to -30 mA, coast IREG = -10 mA, coast All inputs except SR SR input only All inputs except SR SR input only V IH = 2 V VIL = 0.8 V I GLx = 0 I GHx = 0 IGLx = 50 mA IGHx = -50 mA 10% to 90%, with Cload 90% to 10%, with Cload 10% to 90%, with Cload 90% to 10%, with Cload GHx, GLx rising, Cload = 0 GHx, GLx falling, Cload = 0 GHx to GLx, VDEAD = 0 V, Cload = 0 GLx to GHx, IDEAD = 780 µA, Cload = 0
Min
4.75 10.8 12.4 2.0 3.0 -30 -50
Units
mA V V V mV mV V V V V µA µA V V ns ns ns ns ns ns µs ns
Digital Logic Levels
Logic Input Voltage VIH VIL Logic Input Current I IH I IL
Gate Drive
Low-Side Output Voltage High-Side Output Voltage Pulldown Switch Resistance Pullup Switch Resistance Low-Side Output Switching Time High-Side Output Switching Time Propagation Delay Time (PWM to gate output) Maximum Dead Time Minimum Dead Time V GLxH V GHxH r DS(on) rDS(on) trGLx t fGLx trGHx t fGHx t pr t pf tdead tdead VREG - 0.8 VREG - 0.5 10.4 3.5 50 11.6 4.0 14 120 60 120 60 220 110 5.6 100
Continued -- NOTES: 1. Typical Data is for design information only. 2. Negative current is defined as coming out of (sourcing) the specified device terminal.
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3932 THREE-PHASE POWER MOSFET CONTROLLER
ELECTRICAL CHARACTERISTICS: unless otherwise noted at TA = 25°C; VBB = 18 V to 50 V; CLCAP, Cboot = 0.1 µF; CREG = 10 µF; Cload = 3300 pF; fPWM = 22.5 kHz Square Wave; Two Phases Active. Limits Typ Max
11.6 9.0 -25 0 0.91 -1.0 1.1 3.0 -9.0 2.0 9.7 9.1 0.75 165 10 37 12.8 12 ± 5.0 -1.1 1.2 3.3 2.7 10.2 9.6 0.5 0.5
Parameter Bootstrap Capacitor
Bootstrap Charge Current Bootstrap Output Voltage Bootstrap Resistance
Symbol
I Cx V Cx rC x V io I SENSE IREF t blank I RC V RCL V RCH
Conditions
Min
100
Units
mA V mV µA µA µs mA V V mA V V V V V µs °C °C °C/W
VSx = 0, ICx = 0, VREG = 13 V ICx = -50 mA 0 V VIC 1.5 V VIC 0 V, VID 1.5 V VIC 0 V, VID 1.5 V RT = 56 k, CT = 470 pF
10.4 -0.9 1.0 2.7
Current Limit Circuitry
Input Offset Voltage SENSE Input Current REFERENCE Input Current Blank Time RC Charge Current RC Voltage Threshold
Protection Circuitry
Bootstrap Charge Threshold Motor Short-to-Ground Monitor Undervoltage Threshold FAULT Output Voltage TACH Output Voltage TACH Output Pulse Width Thermal Shutdown Temp. Thermal Shutdown Hysteresis Thermal Resistance I Cx V DSH UVLO V FAULT V TACH t TACH TJ T J RJA High K board per JEDEC JESD51-7 VBB - VSX, high side on Increasing VREG Decreasing VREG IO = 1 mA IO = 1 mA IO = 1 mA, CTACH = 50 pF 1.3 9.2 8.6
NOTES: 1.Typical Data is for design information only. 2.Negative current is defined as coming out of (sourcing) the specified device terminal.
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3932 THREE-PHASE POWER MOSFET CONTROLLER
Terminal Descriptions
Terminal
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Name
PGND RESET GLC SC GHC CC GLB SB GHB CB GLA SA GHA CA VREG LCAP FAULT MODE VBB H1 H3 H2 DIR BRAKE SR TACH PWM RC SENSE REF DEAD AGND
RESET -- A logic input used to enable the device, internally pulled up to VLCAP (+5 V). A RESET = 1 will disable the device and force all gate drivers to 0 V, coasting the motor. A RESET = 0 allows the gate drive to follow the commutation logic. The RESET = 1 overrides BRAKE. GLA/GLB/GLC -- Low-side, gate-drive outputs for external NMOS drivers. External series-gate resistors (as close as possible to the NMOS gate) can be used to control the slew rate seen at the power-driver gate, thereby controlling the di/dt and dv/dt of the SA/SB/SC outputs. GLx = 1 (or "high") means that the upper half (PMOS) of the driver is turned on and its drain will source current to the gate of the low-side FET in the external motor-driving bridge. GLx = 0 (or "low") means that the lower half (NMOS) of the driver is turned on and its drain will sink current from the external FET's gate circuit. SA/SB/SC -- Directly connected to the motor, these terminals sense the voltages switched across the load. These terminals are also connected to the negative side of the bootstrap capacitors and are the negative supply connections for the floating high-side drivers. GHA/GHB/GHC -- High-side, gate-drive outputs for external NMOS drivers. External series-gate resistors can be used to control the slew rate seen at the power-driver gate, thereby controlling the di/dt and dv/dt of the SA/SB/SC outputs. GHx = 1 (or "high") means that the upper half (PMOS) of the driver is turned on and its drain will source current to the gate of the high-side FET in the external motor-driving bridge. GHx = 0 (or "low") means that the lower half (NMOS) of the driver is turned on and its drain will sink current from the external FET's gate circuit. CA/CB/CC -- High-side connections for the bootstrap capacitors, positive supply for high-side gate drivers. The bootstrap capacitors are charged to approximately VREG when the associated output Sx terminal is low. When the output swings high, the voltage on this terminal rises with the output to provide the boosted gate voltage needed for n-channel power MOSFETs.
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