Ic Data Sheets; Diagram A2, Tny256 (Ic7500); Internal Block Diagram And Pin Configuration - Philips 50pf9966 Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets

9.15 IC Data Sheets

In this paragraph, the internal block diagrams and pinning are
given of ICs that are drawn as a 'black box' in the electrical
diagrams (with the exception of 'memory' and 'logic' ICs).

9.15.1 Diagram A2, TNY256 (IC7500)

ENABLE/
UNDER-VOLTAGE
9.15.2 Diagram A5, MC33368 (IC7650)
Restart Delay
FB
Comp
Mult
LEB
Current Sense
ZC Det
1
BYPASS
(BP)
LINE UNDER-VOLTAGE
50 A
AUTO-
RESTART
COUNTER
CLOCK
RESET
JITTER
CLOCK
1.5 V + V TH
DC MAX
4
OSCILLATOR
(EN/UV)
1.5 V
Figure 9-12 Internal block diagram and pin configuration
2
Restart Delay
Output
Overvoltage
3
Multiplier/
4
PWM
Error
5
Amplifier
9
Current
6
Sense
WatchdogTimer/
7
Zero Current Detector
5.0 V ref
Restart Delay
Voltage FB
Comp
Current Sense
Zero Current
AGnd
Figure 9-13 Internal block diagram and pin configuration
REGULATOR
5.8 V
BYPASS PIN
UNDER-VOLTAGE
+
5.8 V
-
5.1 V
THERMAL
SHUTDOWN
S Q
R Q
BP S
1 8
S
S
2 7
S
S
3 6
EN/UV D
4
5
UVLO
S
S
R
Q
PIN CONNECTIONS
Line
1 16
2 15 N/C
3 14 N/C
4 13 Frequency Clamp
Mult
5 12 V CC
6 11
Gate
7 10 PGnd
8 9
LEB
(Top View)
FTP2.2U AA
5
DRAIN
(D)
+
- V I
LIMIT
LEADING
EDGE
BLANKING
SOURCE
(S)
E_14650_047.eps
121004
16
Line
12
V CC
Internal Bias
1
V ref
Generator
8
AGnd
11
Gate
10
PGnd
13
Frequency Frequency
Clamp Clamp
E_14650_048.eps
121004
9. EN 115