Block Diagram - Sharp 21KF-80S Service Manual

21KF-80S
TEA1507 (IC701)

Block Diagram

1
V CC
S1
2
GND
3
CTRL
2.5 V
TEA1507
Pinning
SYMBOL PIN
V 1 supply voltage
CC
GND 2 ground
CTRL 3 control input
DEM 4 input from auxiliary winding for
demagnetization timing, OVP and OPP
I 5 programmable current sense input
sense
DRIVER 6 gate driver output
HVS 7 high voltage safety spacer, not
connected
DRAIN 8 drain of external MOS switch, input for
start-up current and valley sensing
SUPPLY
MANAGEMENT
internal UVLO start
supply
M-level
VOLTAGE
CONTROLLED
OSCILLATOR
FREQUENCY
CONTROL
OVER-
TEMPERATURE
PROTECTION
−1
POWER-ON
RESET
UVLO
burst
detect
MAXIMUM
ON-TIME
PROTECTION
DESCRIPTION
START-UP
CURRENT SOURCE
VALLEY
LOGIC
100 mV
VOLTAGE
PROTECTION
LOGIC
DRIVER
LEB
S Q
blank
R Q
OCP
short
winding 0.75 V
Block diagram.
handbook, halfpage
V CC
GND
CTRL
DEM
24
8
DRAIN
clamp
HVS
7
n.c.
4
DEM
OVER-
6
DRIVER
I ss
0.5 V
soft
start
S2
5
I sense
OVERPOWER
PROTECTION
MGU230
1 8 DRAIN
2 7 HVS
TEA1507
3 6 DRIVER
4 5 I sense
MGU231
Pin configuration.