Philips 32PF9968/10 Service Manual page 158

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EN 158 9. Q523.1U LA
9.10.3 Diagram B02A, NCP5422AD (IC 7U00)
Block Diagram
8.6 V
7.8 V
IS+1
IS−1
−
70 mV
IS+2
IS−2
−
70 mV
Pin Configuration
Circuit Descriptions, Abbreviation List, and IC Data Sheets
V
R
CC
OSC
BIAS
V
CC
−
+
−
+
−
FAULT
S Q
Set
Dominant
−
R
+
0.25 V
−
E/A OFF
5.0 A
E/A1
1.0 V
V
COMP1
FB1
1
GATE(H)1
GATE(L)1
GND
BST
IS+1
IS−1
V
FB1
COMP1
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
Figure 9-29 Internal block diagram and pin configuration
CURRENT
SOURCE
GEN
CLK1
OSC
CLK2
S
Reset
Dominant
FAULT
PWM
Comparator 1
R
FAULT
RAMP1
0.425 V
−
S
+
Reset
FAULT Dominant
PWM
Comparator 2
R
FAULT
RAMP2
E/A OFF
0.425 V
1.2 mA
−
− +
E/A2
1.0 V
V COMP2
FB2
SO−16
16
GATE(H)2
GATE(L)2
V
CC
R
OSC
IS+2
IS−2
V
FB2
COMP2
RAMP2
RAMP1
BST
BST
GATE(H)1
non−overlap
V
CC
GATE(L)1
BST
GATE(H)2
non−overlap
V
CC
GATE(L)2
GND
FAULT
F_15400_129.eps
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