A3948SB

A3948SB Datasheet

A3948 DMOS Full-Bridge PWM Motor Driver

Part	Datasheet
A3948SB	A3948SB (pdf)

Related Parts	Information
A3948SLB	A3948SLB
A3948SLBTR	A3948SLBTR

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A3948 DMOS Full-Bridge PWM Motor Driver Discontinued Product These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available. Date of status change April 28, 2007 Recommended Substitutions: NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Data Sheet 29319.36A 3948 A3948SLB SOIC CHARGE PUMP CP 1 CP2 2 CP1 3 PHASE 4 OSC 5 GROUND 6 GROUND 7 LOGIC SUPPLY 8 VDD ENABLE 99 DATA 10 CLOCK 11 STROBE 12 SERIAL PORT LOGIC 24 VREG 23 RANGE NC 22 NO CONNECTION 21 OUTB VBB 20 LOAD SUPPLY 19 GROUND 18 GROUND 17 SENSE 16 OUTA NC 15 NO CONNECTION 14 MODE 13 REF Dwg. PP-069A Note that the A3948SLB SOIC and A3948SB DIP do not share a common terminal assignment. ABSOLUTE MAXIMUM RATINGS Load Supply Voltage, VBB 50 V Output Current, IOUT A Logic Supply Voltage, VDD V Input Voltage, VIN V to VDD + V Sense Voltage, VS V Reference Voltage, VREF V Package Power Dissipation TA = 25°C , PD A3948SB W* A3948SLB W* Operating Temperature Range, TA -20°C to +85°C Junction Temperature, TJ +150°C Storage Temperature Range, TS -55°C to +150°C Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. * Per SEMI G42-88 Specification. DMOS FULL-BRIDGE PWM MOTOR DRIVER Designed for pulse-width modulated PWM current control of dc motors, the A3948SB and A3948SLB are capable of continuous output currents to A and operating voltages to 50 V. Internal fixed offtime PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. Similar devices with outputs rated to ±2 A are available as the A3958SB/SLB. PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a dc motor with externally applied PWM-control signals. The ENABLE input can be programmed via the serial port to PWM the bridge in fast or slow current decay. Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation.

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A3948 DMOS Full-Bridge PWM Motor Driver

Discontinued Product

These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available.

Date of status change April 28, 2007

Recommended Substitutions:

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

Data Sheet 29319.36A
3948

A3948SLB SOIC

CHARGE PUMP

CP 1 CP2 2 CP1 3 PHASE 4 OSC 5 GROUND 6 GROUND 7 LOGIC SUPPLY 8 VDD ENABLE 99 DATA 10 CLOCK 11 STROBE 12

SERIAL PORT

LOGIC
24 VREG
23 RANGE

NC 22

NO CONNECTION
21 OUTB

VBB 20 LOAD SUPPLY 19 GROUND
18 GROUND
17 SENSE
16 OUTA

NC 15

NO CONNECTION
14 MODE
13 REF

Dwg. PP-069A

Note that the A3948SLB SOIC and A3948SB DIP do not share a common terminal assignment.

ABSOLUTE MAXIMUM RATINGS

Load Supply Voltage, VBB 50 V Output Current, IOUT A Logic Supply Voltage, VDD V Input Voltage, VIN V to VDD + V Sense Voltage, VS V Reference Voltage, VREF V Package Power Dissipation TA = 25°C , PD

A3948SB W*

A3948SLB W*

Operating Temperature Range, TA -20°C to +85°C

Junction Temperature, TJ +150°C

Storage Temperature Range, TS -55°C to +150°C

Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C.
* Per SEMI G42-88 Specification.

DMOS FULL-BRIDGE PWM

MOTOR DRIVER

Designed for pulse-width modulated PWM current control of dc motors, the A3948SB and A3948SLB are capable of continuous output currents to A and operating voltages to 50 V. Internal fixed offtime PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. Similar devices with outputs rated to ±2 A are available as the A3958SB/SLB.

PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a dc motor with externally applied PWM-control signals. The ENABLE input can be programmed via the serial port to PWM the bridge in fast or slow current decay. Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A3948SB Datasheet file may be downloaded here without warranties.

Datasheet ID: A3948SB 516027