A3959SLP-T Allegro Microsystems Inc, A3959SLP-T Datasheet

IC MOTOR DRIVER PWM FULL 28TSSOP

A3959SLP-T

Manufacturer Part Number
A3959SLP-T
Description
IC MOTOR DRIVER PWM FULL 28TSSOP
Manufacturer
Allegro Microsystems Inc
Datasheet

Specifications of A3959SLP-T

Applications
PWM Motor Driver
Number Of Outputs
1
Current - Output
±3A
Voltage - Load
9.5 V ~ 50 V
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
Operating Current
10mA
Operating Temperature Classification
Commercial
Package Type
TSSOP EP
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1071

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
A3959SLP-T
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
Package B, 24-pin DIP
with exposed tabs
Features and Benefits
▪ ±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
Packages:
Package LB, 24-pin SOIC
with internally fused pins
Package LP, 28-pin TSSOP
with exposed thermal pad
29319.37K
DS(on)
Outputs (270 mΩ, Typical)
TO V
TO V
EXT MODE
ENABLE
DD
PHASE
DD
SLEEP
BLANK
ROSC
PFD1
PFD2
Not to scale
SUPPLY
LOGIC
V
CHARGE PUMP
DD
BANDGAP
C
TSD
V
REG
DD
CONTROL LOGIC
FAULT DETECT
TIMER
PWM
OSC
VOLTAGE &
DMOS Full-Bridge PWM Motor Driver
Functional Block Diagram
UNDER-
CHARGE
PUMP
Description
Designed for pulse width modulated (PWM) current control of
DC motors, the A3959 is 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.
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 supply and charge
pump, and crossover-current protection. Special power-up
sequencing is not required.
The A3959 provides a choice of three power packages, a 24-pin
DIP with batwing tabs (package suffix ‘B’), a 24-lead SOIC
with four internally-fused pins (package suffix ‘LB’), and a
thin (<1.2 mm) 28-pin TSSOP with an exposed thermal pad
(suffix ‘LP’). In all cases, the power pins and tabs are at ground
potential and need no electrical isolation. Each package is lead
(Pb) free, with 100% matte tin leadframes.
CURRENT
SENSE
CURRENT
DETECT
ZERO
LOAD
SUPPLY
V
REFERENCE
BB
BUFFER &
+
REGULATOR
10
BANDGAP
V
REF
OUT
OUT
SENSE
REG
A
B
R
S
Dwg. FP-048-2A
C
S
V
REF
A3959

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A3959SLP-T Summary of contents

Page 1

Features and Benefits ▪ ± Output Rating ▪ Low r Outputs (270 mΩ, Typical) DS(on) ▪ Mixed, Fast, and Slow Current-Decay Modes ▪ Synchronous Rectification for Low Power Dissipation ▪ Internal UVLO and Thermal-Shutdown Circuitry ▪ Crossover-Current ...

Page 2

... Part Number A3959SB-T 24-pin DIP with exposed tabs A3959SLB-T 24-pin SOIC with internally fused pins A3959SLBTR-T 24-pin SOIC with internally fused pins A3959SLP-T 28-pin TSSOP with exposed thermal pad A3959SLPTR-T 28-pin TSSOP with exposed thermal pad Absolute Maximum Ratings Characteristic Symbol ...

Page 3

A3959 Thermal Characteristics Characteristic Package Power Dissipation Package Thermal Resistance, Junction to Ambient Package Thermal Resistance, Junction to Tab Package Thermal Resistance, Junction to Pad *Additional thermal information available on Allegro website. DMOS Full-Bridge PWM Motor Driver Symbol Test Conditions ...

Page 4

A3959 ELECTRICAL CHARACTERISTICS < 50 kHz (unless noted otherwise) PWM Characteristics Output Drivers Load Supply Voltage Range Output Leakage Current Output On Resistance Crossover Delay Body Diode Forward Voltage Load Supply Current Control Logic Logic Supply Voltage ...

Page 5

A3959 ELECTRICAL CHARACTERISTICS (continued < 50 kHz (unless noted otherwise) PWM Characteristics Reference Divider Ratio Gm Error (Note 3) Propagation Delay Times Thermal Shutdown Temp. Thermal Shutdown Hysteresis UVLO Enable Threshold UVLO Hysteresis NOTES: 1. Typical Data ...

Page 6

A3959 . This internally generated voltage is used to operate V REG the sink-side DMOS outputs. The V be decoupled with a 0.22 μF capacitor to ground. V internally monitored and in the case of a fault condition, the outputs ...

Page 7

A3959 Internal Current-Control Mode. Inputs PFD1 and PFD2 determine the current-decay method after an overcurrent event is detected at the SENSE input. In slow- decay mode, both sink drivers are turned on for the fi xed off-time period. Mixed-decay mode ...

Page 8

A3959 Current Sensing. To minimize inaccuracies in sensing the I current level, which may be caused by TRIP ground trace IR drops, the sense resistor should have an independent ground return to the ground terminal of the device. For low-value ...

Page 9

A3959 (DIP) Package CHARGE PUMP REG ı θ SLEEP PHASE 3 22 ROSC 4 21 OUT LOAD V GROUND SUPPLY GROUND 6 19 GROUND 18 GROUND ...

Page 10

A3959 1.27 MIN +0.25 1.52 –0.38 15.40±0. 24X 0.10 C 0.41 ±0.10 For reference only Pins 6 and 7, and 18 and 19 internally fused Dimensions in millimeters (Reference JEDEC MS-013 AD) Dimensions ...

Page 11

A3959 9.70 ±0. 5.00 28X 0.10 C +0.05 0.25 0.65 –0.06 Copyright ©2001-2008, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. ...

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