A3959SLB-T Datasheet, PDF (3/12 Pages) Allegro MicroSystems – DMOS Full-Bridge PWM Motor Driver

A3959
DMOS Full-Bridge PWM Motor Driver
Thermal Characteristics
Characteristic
Symbol
B package
Test Conditions
Package Power Dissipation
P_D
LB package
LP package
1-layer PCB, minimal exposed copper area
B Package 2-layer PCB, 1-in². 2-oz copper exposed area
4-layer PCB, based on JEDEC standard
Package Thermal Resistance, Junction
to Ambient
R_θJA
1-layer PCB, minimal exposed copper area
LB Package 2-layer PCB, 1-in². 2-oz copper exposed area
4-layer PCB, based on JEDEC standard
1-layer PCB, minimal exposed copper area
LP Package 2-layer PCB, 1-in². 2-oz copper exposed area
4-layer PCB, based on JEDEC standard
Package Thermal Resistance, Junction
to Tab
Package Thermal Resistance, Junction
to Pad
R_θJT
R_θJP
B and LB packages
LP package
*Additional thermal information available on Allegro website.
5
SUFFIX 'B', RQJA = 26oC/W
SUFFIX 'LP', RQJA = 28oC/W
SUFFIX 'LB', RQJA = 35oC/W
4
4-LAYER BOARD
3
2
1 _{SUFFIX 'B', RQJA = 36oC/W}
SUFFIX 'LP', RQJA = 40oC/W
SUFFIX 'LB', RQJA = 51oC/W
2-LAYER BOARD,
1 SQ. IN. COPPER EA. SIDE
0
25
50
75
100
125
150
TEMPERATURE IN oC
Value
3.3
2.5
3.1
54
36
26
77
51
35
100
40
28
6
2
Units
W
W
W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
ºC/W
Allegro MicroSystems, LLC
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com