TCL SY33 Service Manual page 22

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1
V CC
(2)
internal
supply
2
GND
(3)
FREQUENCY
CONTROL
I prot(CTRL)
3
−1
CTRL
(6)
3.8 V
TEA1506P;
TEA1506AP
(TEA1506T;
TEA1506 AT)
Pin numbers in parenthesis represent the SO version.
SUPPLY
MANAGEMENT
UVLO start
VOLTAGE
CONTROLLED LOGIC
OSCILLATOR
UP/DOWN
COUNTER
LOGIC
POWER-ON
RESET
S
UVLO R
S
OVER-
V CC < 4.5 V
TEMPERATURE
R
or UVLO
PROTECTION
(TEA1506AT)
MAXIMUM
ON-TIME
PROTECTION
Fig.2 Block diagram.
VALLEY
100
mV
OVER-
VOLTAGE
PROTECTION
DRIVER
LEB
Q
blank
Q
OCP
Q
Q
short
0.88 V
winding
OVERPOWER
PROTECTION
8
DRAIN
(14)
I prot(DEM)
clamp
4
DEM
(7)
6
DRIVER
(11)
I ss
0.5 V
soft
start
S2
5
I sense
(9)
MDB505