Ic Data Sheets - Philips Q548.1E Service Manual

8. IC Data Sheets

This chapter shows the internal block diagrams and pin
configurations of ICs that are drawn as "black boxes" in the
8.1 Diagram SSB: DC/DC +3V3 +1V2
Block Diagram
8.6 V
7.8 V
IS+1
IS−1
−
70 mV
IS+2
IS−2
−
70 mV
Pin Configuration
B01A, NCP5422AD (IC 7103)
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 8-1 Internal block diagram and pin configuration
IC Data Sheets
electrical diagrams (with the exception of "memory" and "logic"
ICs).
CURRENT
SOURCE
GEN
CLK1
OSC
CLK2
S
Reset
Dominant
FAULT
PWM
Comparator 1
R
RAMP1
0.425 V
−
S
+
Reset
FAULT Dominant
PWM
Comparator 2
R
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
Q548.1E LA
RAMP1 RAMP2
BST
BST
GATE(H)1
non−overlap
V
CC
GATE(L)1
FAULT
BST
GATE(H)2
non−overlap
V
CC
GATE(L)2
FAULT
GND
FAULT
F_15400_129.eps
240505
8. EN 49
2009-Apr-03