Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
9.5
IC Data Sheets
This section shows the internal block diagrams and pin
configurations of ICs that are drawn as “black boxes” in the
electrical diagrams (with the exception of “memory” and “logic”
ICs).
9.5.1
Diagram B02A, NCP5422AD (IC 7U0A)
Figure 9-7 Internal block diagram and pin configuration
Block Diagram
Pin Configuration
F_15400_129.eps
240505
V
CC
Set
Dominant
IS+1
PWM
Comparator 1
PWM
Comparator 2
Reset
Dominant
CURRENT
SOURCE
GEN
BST
FAULT
BIAS
FAULT
R
S
R
S
R
S
RAMP1
GATE(H)1
5.0 A
0.425 V
0.25 V
COMP1
−
+
−
+
−
+
−
+
−
+
−
+
−
+
−
+
−
+
COMP2
V
FB1
RAMP2
FAULT
FAULT
Reset
Dominant
GATE(L)1
GATE(H)2
GATE(L)2
GND
V
CC
BST
V
CC
RAMP1
RAMP2
CLK1
CLK2
OSC
0.425 V
1.0 V
E/A2
E/A OFF
E/A1
E/A OFF
R
OSC
Q
1.2 mA
V
FB2
1.0 V
V
CC
−
+
−
+
IS−1
IS+2
IS−2
− +
− +
8.6 V
70 mV
70 mV
BST
7.8 V
FAULT
FAULT
non−overlap
non−overlap
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW = Work Week
V
FB1
COMP1
IS+1
GATE(H)1
GATE(L)1
GND
BST
IS−1
1
16
GATE(H)2
GATE(L)2
V
CC
R
OSC
IS+2
IS−2
V
FB2
COMP2
W
W
Y
L
W
A
A
2
2
4
5
P
C
N
SO−16
