Philips 50pf9966 Service Manual page 113

EN 116 9. FTP2.2U AA
9.15.3 Diagram A7, TEA1507 (IC7112 and IC7212)
1
V CC
2
GND
3
CTRL
2.5 V
9.15.4 Diagram A7, L4973V (IC7260)
Circuit Descriptions, Abbreviation List, and IC Data Sheets
SUPPLY
MANAGEMENT
internal UVLO start
supply
M-level
S1
VOLTAGE
CONTROLLED
OSCILLATOR
FREQUENCY
CONTROL
OVER-
TEMPERATURE
PROTECTION
1
POWER-ON
RESET
burst
detect
MAXIMUM
ON-TIME
PROTECTION
TEA1507
V CC
GND
CTRL
DEM
Figure 9-14 Internal block diagram and pin configuration
OSC 1 18
OUT 2 17
OUT 3 16
GND 4 15
GND 5 14
GND 6 13
7
V 12
CC
V 8 11
CC
BOOT 9 10
BLOCK DIAGRAM
INH
10(11)
ZERO CURRENT
INHIBIT
17(19)
SOFT
SS
START
11(12)
COMP
SHUTDOWN
5.1V
+
3.3V
E/A
VFB -
12(13)
SYNC OSCILLATOR
18(20)
1(1)
OSC
Pin x = Powerdip
Pin (x) = S020
Figure 9-15 Internal block diagram and pin configuration
START-UP
CURRENT SOURCE
VALLEY
LOGIC
100 mV
OVER-
VOLTAGE
PROTECTION
LOGIC DRIVER
LEB
S Q
blank
R Q
UVLO
OCP
short
0.75 V
winding
1 8 DRAIN
2 7 HVS
TEA1507
3 6 DRIVER
4 5 I sense
MGU231
SYNC
SS
V5.1
GND
GND
GND
VFB
COMP
INH
V5.1 V
16(18) 7(8)
VREF INTERNAL
INTERNAL
SUPPLY
GOOD
5.1V
REFERENCE
3.3V
HICCUP CURRENT
LIMITING
THERMAL CURRENT
LIMITING
R Q
-
S Q
PWM
+
4,5,6,13,14,15
(4,5,6,7,14,15,16,17)
GND
8
DRAIN
clamp
HVS
7
n.c.
4
DEM
6
DRIVER
I ss
0.5 V
soft
start
S2
5
I sense
OVERPOWER
PROTECTION
MGU230
E_14650_049.eps
121004
1 20 SYNC
2 19 SS
3 18 V5.1
4 17 GND
5 16 GND
6 15 GND
7 14 GND
8 13 VFB
9 12 COMP
10 11 INH
V
CC CC
8(9)
CBOOT
CHARGE
5.1V
BOOT
9(10)
DRIVER
2(2) 3(3)
OUT OUT D94IN161B
E_14650_050.eps
121004