UC2625-EP
SLUS802–MARCH 2008 .................................................................................................................................................................................................. www.ti.com
Block Diagram
QUADSEL 22
5 V
REFERENCE
2
VREF
S
R
Q
RC-OSC 25
PWMIN 26
E/AOUT 27
OSC
PWMCLOCK
E/AIN(+)
1
2.9 V
E/AIN(–) 28
SSTART 24
10µA
ISENSE
ISENSE1
ISENSE2
3
4
5
Q1
R
S
Q
0.2 V
ABSVALUE
2.5 V
250 Ω
2X
3.1 V
VCC 19
9 V
PWM
CLOCK
OV-COAST 23
18 PUA
17 PUB
16 PUC
1.75 V
DIR
6
7
DIRECTION
LATCH
SPEED-IN
0.25 V
+5 V
PWMCLOCK
DIR
H1
COAST
CHOP
QUAD
11 PWRVCC
14 PDA
H1
H2
8
9
CROSS
D
L
Q
Q
Q
CONDUCTION
PROTECTION
LATCHES
+5 V
+5 V
H2
H3
DECODER
D
L
13 PDB
H3 10
D
L
BRAKE
12 PDC
15 GND
EDGE
DETECT
+5 V
2k
RC-BRAKE 21
ONE
SHOT
20 TACH-OUT
1 V
6
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