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| YKW-06 Datasheet, PDF (4/5 Pages) Weltrend Semiconductor – Step-down Switching Controller | |||
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YKW-06
Preliminary release Rev. 0.30 20060118
TYPICAL REFERENCE APPLICATION INFORMATION
VCC Q1
L1
C1
D1
VDD
R3
D2
1 OUT
VDD 8
C4
R5
2 SS
3 OVP
4 GND
COMP 7
BRT 6
R4
FB 5
C5
VR
C3
R1
R2
C2
A. Over voltage protection
OVP pin
OVP
Tovp
SS pin
OUT pin
B. EN pin function
VDD
SS pin
Tss
OUT pin
ENOVP (Internal)
C. SS & BRT & FB pin function
Ra=50K
SS
FB
BRT
VR
V1
V ref
Tss
V ref
Ia
R1
VFB=Ia*R1
24 2 TEL:03-5780241 FAX:03-5794278.5770419
Page 4 of 5
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