A3932SLDTR-T Allegro Microsystems Inc, A3932SLDTR-T Datasheet

A3932SLDTR-T

Manufacturer Part Number

A3932SLDTR-T

Description

50V 3 PH BRUSHLESS MTR DC CTLR

Manufacturer

Allegro Microsystems Inc

Datasheet

1.A3932SLDTR-T.pdf (12 pages)

Specifications of A3932SLDTR-T

Applications

DC Motor Controller, Brushless (BLDC), 3 Phase

Number Of Outputs

Voltage - Supply

18 V ~ 50 V

Operating Temperature

-20°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

38-TSSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Output

Voltage - Load

Lead Free Status / Rohs Status

Compliant

Other names

620-1291-2
A3932SLDTR-T

Available stocks

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Manufacturer

Quantity

Price

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Part Number:

A3932SLDTR-T

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RENESAS

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101

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Meier Automation Equipment Co., Limited

Part Number:

A3932SLDTR-T

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ALLEGRO/雅丽高

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Features and Benefits

▪ Drives wide range of N-channel MOSFETs

▪ Synchronous rectification

▪ Power MOSFET protection

▪ Adjustable dead time for cross-conduction pro tec tion

▪ 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

Packages

26301.101H

38-pin TSSOP (sufﬁ x LD)

Not to scale

Three-Phase Power MOSFET Controller

Description

The A3932 is a three-phase MOSFET con trol ler 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 float ing

positive supplies for the gate drive and minimize the component

count normally required. The high-side cir cuit ry also em ploys 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 load-current limit is set by the user’s selection of

an input reference volt age 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.

Optional synchronous rectification is included. This feature will

short out the current path through the power MOSFET reverse

body diodes during the PWM off-cycle current decay. This can

minimize power dissipation in the power MOSFET, eliminate

the need for external power clamp diodes, and potentially allow

more eco nom i cal choices for the MOSFET application.

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, motor-lead short-to-ground, and thermal

shutdown.

The ‘–S–’ part-number suffix in di cates an operating temperature

range of -20°C to +85°C. The ‘–LD–’ suffix in di cates a 38-lead

TSSOP package. The initial ‘–TR–’ variant suffix indicates

tape and reel packing. The ‘–T’ final variant suffix indicates

lead (Pb) free composition, with 100% matte tin leadframe

plating.

A3932

Related parts for A3932SLDTR-T

A3932SLDTR-T Summary of contents

Page 1

Features and Benefits ▪ Drives wide range of N-channel MOSFETs ▪ Synchronous rectification ▪ Power MOSFET protection ▪ Adjustable dead time for cross-conduction pro tec tion ▪ 100% duty cycle operation ▪ Selectable fast or slow current-decay modes ▪ Internal ...

Page 2

... A3932 Selection Guide Part Number A3932SLDTR-T 4000 pieces per reel Absolute Maximum Ratings Characteristic Supply Voltage Peak Regulator Voltage Logic Input Voltage Range Sense Voltage Range Output Voltage Range SA, SB, SC Pins GHA, GHB, GHC Pins CA, CB, CC Pins Operating Ambient Temperature Junction Temperature ...

Page 3

A3932 Three-Phase Power MOSFET Controller Pin-Out Diagram 38-pin TSSOP (sufﬁ x LD) RESET GLC PGND AGND DEAD GHC 6 33 REF SENSE ...

Page 4

A3932 Three-Phase Power MOSFET Controller Functional Block Diagram NOTE — For 12 V applications, VBB is shorted to VREG. The V absolute maximum rating (15 V) must not be REG ex ceed ed. 4 Allegro MicroSystems, Inc. 115 Northeast Cutoff ...

Page 5

A3932 ELECTRICAL CHARACTERISTICS: unless otherwise noted 0.1 μ μF; C boot REG Parameter Supply Current Quiescent Current Reference Voltage Output Voltage V Output Voltage Regulation  Digital Logic Levels Logic Input Voltage Logic ...

Page 6

A3932 ELECTRICAL CHARACTERISTICS: unless otherwise noted 0.1 μ μF; C boot REG Parameter Symbol Bootstrap Capacitor Bootstrap Charge Current Bootstrap Output Voltage Bootstrap Resistance Current Limit Circuitry Input Offset Voltage SENSE Input Current ...

Page 7

A3932 LD Name 1 RESET 2 GLC 3 SC 4,5,18, NC 23,37,38 6 GHC GLB GHB GLA GHA VREG 17 LCAP 19 FAULT 20 MODE ...

Page 8

A3932 FAULT — Open-drain output to indicate fault condition; FAULT = 1 (external pull-up) for any of the following: 1 – invalid HALL input code, 2 – undervoltage condition detected at VREG. 3 – thermal shutdown – motor ...

Page 9

A3932 Logic Inputs DIR ...

Page 10

A3932 Synchronous Rectiﬁ cation. To reduce power dissipation in the external MOSFETs, the A3932 control logic turns on the appropriate low-side and high-side driver during the load-current recirculation, PWM-off cycle. Synchronous rectiﬁ cation allows current to ﬂ ow through the ...

Page 11

A3932 Current Control. Internal ﬁ xed off-time PWM circuitry is implemented to limit load current to a desired value. When a high-side and low-side MOSFET are turned on, current will increase in the motor winding until it reaches a value ...

Page 12

A3932 9. 38X 0.10 C 0.50 0.22 Copyright ©2002-2008, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, ...

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