2961
HIGH-CURRENT
HALF-BRIDGE
PRINTHEAD/MOTOR DRIVER
10
FUNCTIONAL BLOCK DIAGRAM
SUFFIX 'W',
R
= 2.0°C/W
θJT
V
8
6
+5 V
R
CV
BB
REF
CIRCUIT
V
SUFFIX 'B',
= 6.0°C/W
REF
R
V
θJT
CC
2940 Ω
R
RC
S
R
+
-
FLIP-
FLOP
ONE
SHOT
V
SENSE
4
2
0
C
LOW
TRIP
Q
SUFFIX 'W', R
= 38°C/W
θJA
MODE
SOURCE OUT
SUFFIX 'B', R
50
= 43°C/W
θJA
V
BB
TSD
25
75
100
125
150
TEMPERATURE IN °C
Dwg. GP-032A
ENABLE
INPUT
SINK OUT
EMITTER
GROUND
Dwg. FP-019A
UDN2961W
V
BB
CURRENT-
CONTROL
LOGIC
V
BB
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
Dwg. PP-036
115 Northeast Cutoff, Box 15036
W
orcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, 1996 Allegro MicroSystems, Inc.