Ic Data Sheets - Philips 19PFL5522D Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets

9.11 IC Data Sheets

This section shows the internal block diagrams and pin layouts
of ICs that are drawn as "black boxes" in the electrical diagrams
(with the exception of "memory" and "logic" ICs).
9.11.1 Diagram A1, Type TY72011AP2 (IC U130), PWM Controller
Block Diagram
HV
1
NC 2
Demag
3
Ri
FB
4
Ct
5
OVP
6
NC
7
Pin Configuration
Over Voltage
Protection (Vcc > 41V?)
Last pulse of
demag after 4µs
DEMAG ?
Rf
Verr max = 3V
Verr min = 10mV
1/3
2.5V
Over Current
Protection (OCP)
250mV - 1V max setpoint
V(-) < 1.5V
250mV clamp
More than 128ms?
--> protection circuitry
HV
1
nc
2
Demag
3
FB
4
Ct
5
OVP
6
nc
7
Figure 9-12 Internal block diagram and pin configuration
Startup
Internal Vcc
Internal regulator
Clock
OVP
Flip-Flop
R Q
D
Current comparator
1V
VCO Feedback
Toff = f (Verr)
Verr
Max Toff = f (Ct)
20k
nc
14
Vcc
13
Drive
12
Isense
11
GND
10
nc
9
nc
8
LC7.2E LB 9.
Vcc pin13
UVLOh = 15V
14
UVLOl = 7.2V
13
12
Internal Clamp
11
Driver
10
200ns L.E.B
Vcc pin8
4x10V zener
OVP
500
60mV
H_17170_034.eps
EN 87
Vcc
DRV
Isense
Gnd
NC
9
NC
8
250507