Philips MRV640 - IC7313 TEA 1507 Analog Board, Power Supply Control

Circuit-, IC descriptions and list of abbreviations
EN 134 DVDR615, MRV6409.
IC7313 TEA 1507 Analog Board, Power Supply Control
BLOCK DIAGRAM
a
ndbook, full pagewidth
SUPPLY
MANAGEMENT
internal
supply
UVLO start
M-level
V
CC
1 2
3
GND
S1
CTRL
FREQUENCY
CONTROL
VOLTAGE
CONTROLLED
OSCILLATOR
LOGIC
LOGIC
OVER-
VOLTAGE
PROTECTION
OVERPOWER
PROTECTION
short
winding
soft
start
S2
OVER-
TEMPERATURE
PROTECTION
SQ R
UVLO
Q
MAXIMUM
ON-TIME
PROTECTION
POWER-ON
RESET
−1
VALLEY
TEA1507
100 mV
clamp
DRIVER
START-UP
CURRENT SOURCE
0.75 V
0.5 V
5
I
sense
6
DRIVER
MGU230
4
DEM
8
DRAIN
7
HVS n.c.
OCP
LEB
blank
I
ss
2.5 V
burst detect
Fig.2 Block diagram.