A3949_04 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – DMOS Full-Bridge Motor Driver

A3949
DMOS Full-Bridge Motor Driver
A3949SLB SOIC
Scale 1:1
N/C 1
MODE 2
PHASE 3
GND 4
SLEEP 5
ENABLE 6
OUTA 7
SENSE 8
A3949SLP TSSOP
N/C 1
MODE 2
PHASE 3
GND 4
SLEEP 5
Scale 1:1 ^{ENABLE 6}
OUTA 7
SENSE 8
16 N/C
15 VREG
14 VCP
13 GND
12 CP2
11 CP1
10 OUTB
9 VBB
16 N/C
15 VREG
14 VCP
13 GND
12 CP2
11 CP1
10 OUTB
9 VBB
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage
V ...............................................................36 V
BB
V_BB (Peak < 2 μs) ........................................38 V
Output Current, I_OUT (Repetitive)¹ ....................±2.8 A
Sense Voltage, V .........................................0.5 V
SENSE
Logic Input Voltage, V ......................–0.3 V to 7 V
IN
Package Power Dissipation, P_D
A3949SLB² ......................................... 52ºC / W
A3949SLP³.......................................... 34ºC / W
Operating Temperature Range
Ambient Temperature, T_A ............–20°C to +85°C
Junction Temperature, T_J .................+150°C Max.
Storage Temperature, T ...........–55°C to +150°C
S
1_{Output current rating may be limited by duty cycle,}
ambient temperature, and heat sinking. Under any set of
conditions, DO NOT exceed the specified I_OUT or T_J.
2_{Measured on a typical two-sided PCB with 2 in.}2 _copper
ground plane.
3_{Measured on a JEDEC-standard "High-K" 4-layer PCB.}
Designed for PWM (pulse width modulated) control of dc motors, the
A3949 is capable of peak output currents to ±2.8 A and operating volt-
ages to 36 V.
PHASE and ENABLE input terminals are provided for use in control-
ling 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 and V , and crossover current protec-
BB
CP
tion.
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 available in a lead-free version (100% matte tin
leadframe).
FEATURES
Single supply operation
Very small outline package
Low R_DS(ON) outputs
Sleep function
Internal UVLO
Crossover current protection
Thermal shutdown protection
Use the following complete part numbers when ordering:
Part Number
A3949SLB-T
A3949SLBTR-T
A3949SLP-T
A3949SLPTR-T
Pb-free^*
Yes
Yes
Yes
Yes
Package
16-pin, SOIC
16-pin, SOIC
16-pin, TSSOP
16-pin, TSSOP
Packing
47 per tube
1000 per reel
96 per tube
4000 per reel
*_{Pb-based variants are being phased out of the product line. The variants cited}
in this 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 of LAST TIME BUY orders: April 27, 2007. These variants include:
A3949SLB, A3949SLBTR, A3949SLP, and A3949SLPTR.