DEH-P690UB/XN/UC
63
5
6
7
8
5
6
7
8
C
D
F
A
B
E
-
Block Diagram
-
+
-
+
-
+
-
+
Σ
2.9 V
BIAS
REGULA
T
OR
200 kHz
OSCILLA
T
O
R
FREQ
UENCY
FOLDBA
CK
SW
FB
1, 8, 9,
16, 17
GND
SLOPE COMP
ANTISLOPE COMP
BIAS
INTERNAL
V
CC
SYNC
0.4 V
5.5 A
CURRENT
COMP
ARA
T
OR
R
LIMIT
R
SENSE
ERR
O
R
AMPLIFIER
g
m
= 2000 Mho
Q2
FOLDBA
CK
CURRENT
LIMIT
CLAMP
BOOST
R
S
FLIP-FLOP
DRIVER
CIRCUITR
Y
S
R
Q1
PO
WER
SWITCH
1.22 V
10
14
shdn
15
6
2
12
11
V
C
LOCK
OUT
COMP
ARA
T
OR
SHUTDO
WN
COMP
ARA
T
O
R
2.38 V
×
1
Q3
V
C(MAX)
CLAMP
LT1766EFE-5
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SW
NC
VIN
NC
BOOST
NC
GND
GND
shdn
SYNC
NC
FB/SENSE
VC
BIAS
GND
GND
17
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9
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Q
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