Ic Data Sheets - Philips 32PF9968/10 Service Manual

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Circuit Descriptions, Abbreviation List, and IC Data Sheets

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
Enable / V UVLO /
CC
Enable
UVLO Adjust
1
Osc Charge
Variable
2
Frequency
Osc RC
3
Oscillator
Oscillator
Control Current
16
One–Shot One–Shot
Error Amp
6
Output
Clamp
8
Noninverting
Input
Inverting Input
7
Error
11
Amp
Soft–Start
Figure 9-27 Internal block diagram and pin configuration
5.0 V
Reference
V UVLO
ref
Steering
Flip–Flop
2.5 V
Soft–Start
Fault Detector
4 Ground
Figure 9-28 Internal block diagram and pin configuration
Q523.1U LA
PIN CONFIGURATION
Osc/Out
Pin Configuration
5
V
ref
Osc Charge
Osc RC
Osc Control Current
14
Output A
Gnd
12
V ref
Output B
Error Amp Out
13
Pwr Gnd
Inverting Input
Noninverting Input
10
Fault Input
9.
1 8
V
SS
Osc/In 2 7
3 6
V
4 5
DD
E_14620_145.eps
MC34067
One–Shot RC
1 16
15 V CC
2
Drive Output A
14
3
Power Gnd
13
4
Drive Output B
5 12
C Soft–Start
6 11
Fault Input
10
7
Enable/UVLO
8 9
Adjust
(Top View)
F_15710_163.eps
230905
EN 157
V
M
Mode
N.C.
V
G
230905