Daewoo DTP-28B1, Service Manual

Page: 37 / 76

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4-8-4 Pins description
pin name symbol description
1 Overcurrent / feedback O.C.P./ F.B. Input of over current detection signal and
feedback signal
2 Source S MOSFET source
3 Drain D MOSFET drain
4 Supply V
IN
Input of power supply for control circuit
5 Ground GND Ground
4-8-5 Control part electrical characteristics
IC PIN RATING
NUMBER MIN. TYPE MAX
Operation start voltage 4-5 V
IN
(on) 14.4 16 17.6 V
Operation stop voltage 4-5 V
IN
(off) 9 10 111 V
Circuit current in 4-5 I
IN
(on) - - 30 mA
operation
Circuit current in non- 4-5 I
IN
(off) - - 100 mA A
operation
Maximum OFF time - T
OFF
(max) 45 - 55 SEC
Minimum time for input of 1-5 T
TH
(2) - - 1.0 SEC
quaxi resonant signals
Minimum off time - T
OFF
(min) - - 1.5 SEC
O.C.P./F.B. terminal 1-5 V
TH
(1) 0.68 0.73 0.78 V
threshold voltage 1
O.C.P./F.B. terminal 1-5 V
TH
(2) 1.3 1.45 1.6 V
threshold voltage 2
O.C.P./F.B. terminal extraction 1-2 I
OCP/FB
1.2 1.35 1.5 mA
current
O.V.P. operation voltage 4-5 V
IN
(OVP) 20.5 22.5 24.5 V
Latch circuit sustaining voltage 4-5 I
IN
(H) - - 400 A
Latch circuit release voltage 4-5 V
IN
(La.off) 6.6 - 8.4 V
Thermal shutdown operating - T
J
(TSD) 140 - -
0
C
temperature
SYMBOL
UNIT
DESCRIPTION