A3936SED Allegro Microsystems Inc, A3936SED Datasheet

A3936SED

Manufacturer Part Number

A3936SED

Description

IC MOTOR DRIVER PWM 3PH 44-PLCC

Manufacturer

Allegro Microsystems Inc

Datasheets

1.A3936SED.pdf (10 pages)

2.A3936SED.pdf (10 pages)

Specifications of A3936SED

Applications

DC Motor Driver, Brushless (BLDC), 3 Phase

Number Of Outputs

Current - Output

±3A

Voltage - Load

9 V ~ 50 V

Voltage - Supply

3 V ~ 5.5 V

Operating Temperature

-20°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

44-LCC (J-Lead)

Operating Current

10mA

Operating Temperature Classification

Commercial

Package Type

PLCC

Operating Supply Voltage (min)

Operating Supply Voltage (typ)

Operating Supply Voltage (max)

5.5V

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

A3936SED

Manufacturer:

Allegro MicroSystems, LLC

Quantity:

10 000

Company:

BOSTOCK HK LIMITED

Part Number:

A3936SED-T

Manufacturer:

Allegro MicroSystems, LLC

Quantity:

10 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A3936SEDT-T

Manufacturer:

ALLEGEO

Quantity:

4 492

Company:

BOSTOCK HK LIMITED

Part Number:

A3936SEDTR

Manufacturer:

Allegro MicroSystems, LLC

Quantity:

10 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A3936SEDTR-T

Manufacturer:

STANSON

Quantity:

12 000

Company:

BOSTOCK HK LIMITED

Part Number:

A3936SEDTR-T

Manufacturer:

Allegro MicroSystems, LLC

Quantity:

10 000

Current page: 1 of 10
Download datasheet (290Kb)

Features and Benefits

▪ ±3 A, 50 V continuous output rating

▪ Low r

▪ Configurable mixed-, fast- and slow-current-decay modes

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO and thermal shutdown circuitry

▪ Crossover-current protection

▪ Tachometer output for external speed control loop

Package: 44-pin PLCC (suffix ED)

Not to scale

A3936-DS, Rev. 8

315 mΩ sink)

DS(on)

outputs (typically 500 mΩ source,

EXT MODE

ENABLE

BRAKE

BLANK

SLEEP

HBIAS

TACH

PFD1

PFD2

VDD

DIR

VREG

TSD

UVLO [V

PWM Current Ctrl.

Current Protection

Regulator

and Gate Drive

Fixed Off-Time

Fast, Slow, and

DMOS Three-Phase PWM Motor Driver

Blanking Time

Control Logic

REG

Mixed Decay

Crossover

Sync. Rect.

Typical Application

GND

OSC

]

GND

Osc

Zero Current Detect

3X Half Bridge

GND

Description

Designed for pulse-width-modulated (PWM) current control

of three-phase brushless DC motors, the A3936 is capable of

peak output currents to ±3 A and operating voltages to 50 V.

Internal fixed off-time PWM current-control timing circuitry

can be configured to operate in slow-, fast- and mixed-decay

modes.

Internal synchronous rectification control circuitry is provided

to improve power dissipation during PWM operation.

Internal circuit protection includes thermal shutdown with

hysteresis, and crossover current protection. Special power-up

sequencing is not required.

The A3936 is supplied in a 44-pin plastic PLCC with internally

fused leads (three on each side) for enhanced heat dissipation.

These leads are at ground potential and need no electrical

isolation. This device is lead (Pb) free version, with 100%

matte tin leadframe plating.

Current Sense

CP1

Charge Pump

CP2

VCP

VBB1

VBB2

LSS1

LSS2

SENSE

HA–

HB–

HC–

HA+

HB+

HC+

OUTA

OUTB

OUTC

VDD

A3936

Related parts for A3936SED

A3936SED Summary of contents

Page 1

Features and Benefits ▪ ± continuous output rating ▪ Low r outputs (typically 500 mΩ source, DS(on) 315 mΩ sink) ▪ Configurable mixed-, fast- and slow-current-decay modes ▪ Synchronous rectification for low power dissipation ▪ Internal UVLO ...

Page 2

... A3936 Selection Guide Part Number A3936SEDTR-T* 450 pieces per reel *Variant is in production but has been determined to be LAST TIME BUY. This classification indicates that the vari- ant is obsolete and notice has been given. Sale of the variant is currently restricted to existing customer applica- tions ...

Page 3

A3936 V DD TACH HBIAS HA+ Comm HA- Log ic HALL HB+ HB- HALL HC+ HC- HALL SLEEP DIR EXTMODE BRAKE SR ENABLE VDD OSC BLANK PWM TIMER PFD1 PFD2 DMOS Three-Phase PWM Motor Driver Functional Block Diagram R E ...

Page 4

A3936 ELECTRICAL CHARACTERISTICS +25°C, VBB = Output Drivers ...

Page 5

A3936 ELECTRICALCHARACTERISTICS (continued (unless noted otherwise Control Logic ...

Page 6

A3936 ELECTRICALCHARACTERISTICS (continued (unless noted otherwise Hall Logic ...

Page 7

A3936 The VREG pin should be decoupled with a 0.22 VREG. μF capacitor to ground. This supply voltage is used to run the sink side DMOS outputs. VREG is internally monitored and in the case of a fault condition, the ...

Page 8

A3936 PWM Blank Timer. When a source driver turns on, a current spike occurs due to the reverse recovery currents of the clamp diodes and/or switching transients related to distributed capacitance in the load. To prevent this current spike from ...

Page 9

A3936 Terminal List Pin No ...

Page 10

A3936 16.59 ±0.08 17.53 ±0.13 44X 0.10 Copyright ©2002-2009, 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, from time to time, ...

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