A3959SLPTRT Allegro Micro Systems, Inc., A3959SLPTRT Datasheet

A3959SLPTRT

Manufacturer Part Number

A3959SLPTRT

Description

TSSOP

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A3959SB-T.pdf (12 pages)

Specifications of A3959SLPTRT

Date_code

09+

Current page: 1 of 12
Download datasheet (612Kb)

* Double-sided board, one square inch copper each

side. See also, Layout, page 7.

Load Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range, V

Sense Voltage, V

Reference Voltage, V

Package Power Dissipation (T

Operating Temp. Range, T

Junction Temperature, T

Storage Temp. Range, T

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.

Note that the A3959SLB(SOIC), A3959SB (DIP),

and A3959SLP (TSSOP) do not share a common

terminal assignment.

ABSOLUTE MAXIMUM RATINGS

LOGIC SUPPLY

(Peak, <3 µs) ................................... ±6.0 A

(Continuous) ............ -0.3 V to V

A3959SB ........................................ 3.3 W*

A3959SLB ...................................... 2.5 W*

A3959SLP ...................................... 3.1 W*

GROUND

ENABLE

PHASE

BLANK

<30 ns) ............... -1.0 V to V

<3 µs) ........................................... 2.5 V

ROSC

PFD

A3959SLB

OUT

(Continuous) .............. 0.5 V

(Repetitive) ........... ±3.0 A

REF

............................ V

..................... +150°C

......................... 50 V

..... -55°C to +150°C

(SOIC)

....................... 7.0 V

.... -20°C to +85°C

= 25°C), P

SLEEP

CONNECTION

OUT

LOAD SUPPLY

GROUND

SENSE

CONNECTION

EXT MODE

REF

GROUND

OUT

REG

Dwg. PP-069-4

+ 0.3 V

+ 1.0 V

footnote are in production but have been determined to be LAST TIME BUY. This

classification indicates that sale of this device is currently restricted to existing

customer applications. The variants should not be purchased for new design

applications because obsolescence in the near future is probable. Samples are no

longer available. Status change: October 31, 2006. Deadline for receipt fo LAST TIME

BUY orders: April 27, 2007. These variants include: A3959SB, A3959SLB,

A3959SLBTR, A3959SLP, and A3959SLPTR.

3959

motors, the A3959SB, A3959SLB, and A3959SLP are capable of

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

off-time PWM current-control timing circuitry can be adjusted via

control inputs to operate in slow, fast, and mixed current-decay modes.

controlling the speed and direction of a dc motor with externally

applied PWM-control signals. Internal synchronous rectification

control circuitry is provided to reduce power dissipation during PWM

operation.

hysteresis, undervoltage monitoring of supply and charge pump, and

crossover-current protection. Special power-up sequencing is not

required.

24-pin plastic DIP with a copper batwing tab (package suffix ‘B’), a

24-lead plastic SOIC with a copper batwing tab (package suffix ‘LB’),

and a thin (<1.2 mm) 28-lead plastic TSSOP with an exposed thermal

pad (suffix ‘LP’). In all cases, the power tab is at ground potential and

needs no electrical isolation.

free version (100% matte tin leadframe).

FEATURES

Pb-based variants are being phased out of the product line. The variants cited in this

A3959SLBTR-T

A3959SLPTR-T

A3959SLB-T

A3959SLP-T

Part Number

A3959SB-T

±3 A, 50 V Output Rating

Low r

Mixed, Fast, and Slow Current-Decay Modes

Synchronous Rectification for Low Power Dissipation

Internal UVLO and Thermal-Shutdown Circuitry

Crossover-Current Protection

Internal Oscillator for Digital PWM Timing

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

PHASE and ENABLE input terminals are provided for use in

Internal circuit protection includes thermal shutdown with

The A3959SB/SLB/SLP is a choice of three power packages, a

DS(on)

Outputs (270 mΩ, Typical)

Pb-free*

DMOS FULL-BRIDGE PWM

Yes

(°C/W)

θJA

Each package is available in a lead-

(°C/W)

–

θJT

MOTOR DRIVER

24-Lead SOIC

28-pin TSSOP

24-Pin DIP

Package

4000 per reel

1000 per reel

25 per tube

47 per tube

50 per tube

Packing

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