Daewoo DWP-28W2ZLF - Manual (Page 47)

Appendix Service manual WP-795
- 20 -
1-7 -4 pin description
PIN NAME SYMBOL DESCRIPTION
1 Overcurrently
feedback
O.C. P/E.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
1-7 -5 Control part - electrical characteristics
Rating
Description
IC pins
Number
Symbol
Min. Type Max.
Unit
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 operation 4-5 I
IN
(on) - - 30 mA
Circ. current in non-operation 4-5 I
IN
(off) - - 100
µ
A
Maximum off time - T
OFF
(max) 45 - 55
µ
SEC
Minimum time for input of quaxi
resonant signals 1-5 T
TH
(2) - - 1.0
µ
SEC
Minimum off time - T
OFF
(min) - - 1.5
µ
SEC
O.C.P./F.B. terminal threshold
voltage 1 1-5 V
TH
(1) 0.68 0.73 0.78 V
O.C.P./F.B. terminal threshold
voltage 2 1-5 V
TH
(2) 1.3 1.45 1.6 V
O.C.P./F.B. terminal extraction
current 1-2 I
OCP/FB
1.2 1.35 1.5 mA
OVP operation voltage 4-5 V
IN
(OVP) 20.5 22.5 24.5 V
Latch circuit sustaining voltage 4-5 I
IN
(H) - - 400
µ
A
Latch circuit release voltage 4-5 V
IN
(Loff) 6.6 - 8.4 V
Thermal shutdown operating
temperature - T
J
(TSD) 140 - -
0
C
1-7 -6 MOSFET electrical characteristics
Rating
Description
IC pins
Number
Symbol
Min. Type Max.
Unit
Drain-to-source break down
voltage 3-2 V
DSS
650 - - V
Drain leakage current 3-2 I
DSS
- - 300
µ
A
On-resistance 3-2 R
DS
(on) - - 1.95
Ω
Switching time 3-2 tf - - 250 nsec
Thermal resistance - O
CH
- F - - 0.95 0 C/W