A3949
DMOS Full-Bridge Motor Driver
A3949SLB SOIC
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.
N/C
1
2
3
4
5
6
7
8
16 N/C
MODE
PHASE
GND
15 VREG
14 VCP
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.
GND
CP2
13
12
11
10
9
SLEEP
ENABLE
OUTA
CP1
Scale 1:1
OUTB
VBB
SENSE
Internal circuit protection includes thermal shutdown with hysteresis,
undervoltage monitoring of VBB and VCP , and crossover current protec-
tion.
A3949SLP TSSOP
N/C
MODE
PHASE
GND
16
15
14
13
12
11
10
9
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).
1
2
3
4
5
6
7
8
N/C
VREG
VCP
GND
CP2
SLEEP
ENABLE
CP1
Scale 1:1
OUTA
OUTB
VBB
FEATURES
SENSE
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Single supply operation
Very small outline package
Low RDS(ON) outputs
Sleep function
Internal UVLO
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage
VBB...............................................................36 V
BB (Peak < 2 μs)........................................38 V
Crossover current protection
Thermal shutdown protection
V
Output Current, IOUT (Repetitive)1....................±2.8 A
Sense Voltage, VSENSE .........................................0.5 V
Logic Input Voltage, VIN ......................–0.3 V to 7 V
Package Power Dissipation, PD
Use the following complete part numbers when ordering:
A3949SLB2 ......................................... 52ºC / W
A3949SLP3.......................................... 34ºC / W
Operating Temperature Range
Part Number
A3949SLB-T
Pb-free*
Yes
Package
Packing
16-pin, SOIC
16-pin, SOIC
16-pin, TSSOP
16-pin, TSSOP
47 per tube
1000 per reel
96 per tube
4000 per reel
A3949SLBTR-T
A3949SLP-T
Yes
Ambient Temperature, TA ............–20°C to +85°C
Junction Temperature, TJ .................+150°C Max.
Storage Temperature, TS...........–55°C to +150°C
Yes
A3949SLPTR-T
Yes
1Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under any set of
conditions, DO NOT exceed the specified IOUT or TJ.
2Measured on a typical two-sided PCB with 2 in.2 copper
ground plane.
*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.
3Measured on a JEDEC-standard "High-K" 4-layer PCB.