Sharp 21KF-80S - Block Diagram

24
21KF-80S
TEA1507 (IC701)
Block Diagram
Pinning
SYMBOL PIN DESCRIPTION
V
CC
1 supply voltage
GND 2 ground
CTRL 3 control input
DEM 4 input from auxiliary winding for
demagnetization timing, OVP and OPP
I
sense
5 programmable current sense input
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
handbook, halfpage
MGU231
TEA1507
1
2
3
4
V
CC
GND
CTRL
DEM
DRAIN
HVS
DRIVER
I
sense
8
7
6
5
Pin configuration.
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
Block diagram.