Ic Data Sheets; Internal Block Diagram And Pin Configuration - Philips Q528.1E Service Manual

EN 146 9. Q528.1E LA

9.10 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).
9.10.1 Diagram A1, AVS1ACP08 (IC 7305)
BLOCK DIAGRAM
9.10.2 Diagram A2, MC34067P (IC 7001)
Block Diagram
15
V
CC
9
V UVLO /
Enable /
CC
UVLO Adjust Enable
1
Osc Charge
Variable
2
Frequency
Osc RC
3
Oscillator
Oscillator
Control Current
16
One–Shot One–Shot
Error Amp
6
Output
8
Noninverting
Input
Inverting Input
7
Error
11
Amp
Soft–Start
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Figure 9-23 Internal block diagram and pin configuration
5.0 V
Reference
V UVLO
ref
Steering
Flip–Flop
2.5 V
Clamp
Soft–Start
Fault Detector
4 Ground
Figure 9-24 Internal block diagram and pin configuration
PIN CONFIGURATION
Osc/In
Osc/Out
Pin Configuration
5
V
ref
Osc Charge
Osc RC
Osc Control Current
14
Output A
12
Output B
Error Amp Out
13
Pwr Gnd
Inverting Input
Noninverting Input
10
Fault Input
V 1 8 V
SS
2 7 Mode
3 6
N.C.
V 4 5
DD
E_14620_145.eps
MC34067
One–Shot RC
1 16
V CC
15
2
Drive Output A
14
3
Gnd Power Gnd
13
4
V ref Drive Output B
5 12
C Soft–Start
6 11
Fault Input
7 10
Enable/UVLO
8 9
Adjust
(Top View)
F_15710_163.eps
M
V
G
230905
230905