A3949SLP-T Allegro Microsystems Inc, A3949SLP-T Datasheet

IC MOTOR DRIVER PWM FULL 16-TSSO

A3949SLP-T

Manufacturer Part Number
A3949SLP-T
Description
IC MOTOR DRIVER PWM FULL 16-TSSO
Manufacturer
Allegro Microsystems Inc
Datasheets

Specifications of A3949SLP-T

Applications
PWM Motor Driver
Number Of Outputs
1
Current - Output
±2.8A
Voltage - Supply
8 V ~ 36 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
Operating Current
8.5mA
Operating Temperature Classification
Commercial
Package Type
TSSOP EP
Operating Supply Voltage (max)
36V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Load
-
Lead Free Status / Rohs Status
Compliant
Other names
620-1063
Features and Benefits
▪ Single supply operation
▪ Very small outline package
▪ Low R
▪ Sleep function
▪ Internal UVLO
▪ Crossover current protection
▪ Thermal shutdown protection
Packages:
Not to scale
29319.47F
Package LB, 16-pin SOIC
with internally fused pins
DS(ON)
outputs
ENABLE
PHASE
SLEEP
MODE
Package LP, 16-pin TSSOP
with exposed thermal pad
.22 μF
25 V
Gate Supply
Low Side
Functional Block Diagram
VREG
Control
Logic
DMOS Full-Bridge Motor Driver
OSC
DMOS Full Bridge
Description
Designed for PWM (pulse width modulated) control of dc
motors, the A3949 is capable of peak output currents to ±2.8
A and operating voltages to 36 V.
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. Internal synchronous rectification
control circuitry is provided to reduce power dissipation during
PWM operation.
Internal circuit protection includes thermal shutdown with
hysteresis, undervoltage monitoring of V
crossover current protection.
The A3949 is supplied in a choice of two power packages, a
16-pin plastic SOIC with a copper batwing tab (part number
suffix LB), and a low profile (1.1mm) 16-pin TSSOP (suffix
LP) with exposed power tab. Both packages are lead (Pb) free,
with 100% matte tin leadframes.
CP1
Charge
0.1 μF
Pump
CP2
VCP
VBB
OUTA
OUTB
SENSE
GND
GND
0.1 μF
0.1 μF
100 μF
Supply
Load
BB
and V
A3949
CP
, and

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A3949SLP-T Summary of contents

Page 1

Features and Benefits ▪ Single supply operation ▪ Very small outline package ▪ Low R outputs DS(ON) ▪ Sleep function ▪ Internal UVLO ▪ Crossover current protection ▪ Thermal shutdown protection Packages: Package LP, 16-pin TSSOP Package LB, 16-pin SOIC ...

Page 2

... A3949 Selection Guide Part Number A3949SLB-T 16-pin, SOIC A3949SLBTR-T 16-pin, SOIC A3949SLP-T 16-pin, TSSOP A3949SLPTR-T 16-pin, TSSOP Absolute Maximum Ratings Characteristic Load Supply Voltage Logic Input Voltage Sense Voltage Output Current, Repetitive Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Package Thermal Characteristics* ...

Page 3

A3949 ELECTRICAL CHARACTERISTICS Characteristics Output-On Resistance Body Diode Forward Voltage Motor Supply Current Logic Input Voltage PHASE, ENABLE, MODE Logic Input Voltage SLEEP Logic Input Current PHASE, MODE pins Logic Input Current ENABLE pin Logic Input Current SLEEP pin Propagation ...

Page 4

A3949 PWM Control Timing Diagram SLEEP ENABLE PHASE MODE V BB OUTA OUTB OUT OUTA 1 2 DMOS Full-Bridge Motor Driver VBB OUTA OUTB 5 ...

Page 5

A3949 VREG. This supply voltage is used to operate the sink- side DMOS outputs. VREG is internally monitored and in the case of a fault condition, the outputs of the device are disabled. The VREG pin should be decoupled with ...

Page 6

A3949 LB Package N/C 1 MODE 2 PHASE 3 GND 4 SLEEP 5 ENABLE 6 OUTA 7 SENSE 8 Name N/C MODE PHASE GND SLEEP ENABLE OUTA SENSE VBB OUTB CP1 CP2 GND VCP VREG N/C *For the TSSOP package, ...

Page 7

A3949 10. 16X 0.10 C 0.41 1.27 5. 3.00 16X 0.10 C 0.25 0.65 DMOS Full-Bridge Motor Driver LB 16-Pin SOICW 0.65 4º 0.27 10.30 7.50 0.84 0.25 C SEATING PLANE ...

Page 8

A3949 Copyright ©2003-2007, 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, such de par tures from the ...

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