Ricoh RV5VH - Manual (Page 27)

23
RV5VH1
××
/RV5VH2
××
<Components> Coils L1 : 27µH, L2 : 220µH
Diodes Schottky type
Capacitors C1 : 47µF(tantalum type), C2 : 22µF(tantalum type)
C3 : 0.01µF(ceramic type)
C4 : 0.01µF(ceramic type)
PMOS 2SJ238(TOSHIBA), etc.
NPN Tr. 2SD1628G(SANYO), etc.
Resistors R1 : 100K
Ω
R2 : 0-500K Ω
R3 : 100K
Ω
R4 : 300
Ω
TYPICAL APPLICATION
• RV5VH1
××
CSW
V SEN
V OUT1
L X1
D OUT
FB
EXT2
GND
C2
L1
L2
D1
PMOS
R3
R1
R2 C3
D2
C1
Output DC/DC1
Output DC/DC2
• RV5VH2
××
CSW
V SEN
V OUT1
EXT1
D OUT
FB
EXT2
GND
C2
L1
L2
SBD
PMOS
R3
R1
R2 C3
SBD
C1
NPN Tr.
C4
R4
Output DC/DC1
Output DC/DC2
<Components> CoiIs L1 : 100µH, L2 : 220µH
Diodes Schottky type
Capacitors C1, C2 : 22µF(tantalum type), C3 : 0.01µF(ceramic type)
Tr PMOS : 2SJ238
Resistors R1, R2 : several hundreds k
Ω
, R3 : 100k
Ω