Rh5rh – Ricoh RH5RH13B User Manual
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V
IN
Trance1:1
Diode
OUT
Vss
V
OUT
+
Capacitor
Lx
RH5RH
××
1A
Starter Circuit
(Note) Use a RH5RH
××
2B,depend on the Output Current.
FIG. 8
ZD
ST
R
ST
Tr
V
OUT
side
V
OUT
side
V
IN
side
V
IN
side
Starter Circuit
Starter Circuit
ZDst 2.5V
≤
/ZDst
≤
Designation of Output Voltage
Rst Input Bias Current of ZDst and Tr.
(several k
Ω
to several hundreds k
Ω
)
• Step-up/Step-down Circuit with Flyback
*
The Starter Circuit is necessary for all above circuits.
1.for Step-up Circuit.
2.for Step-down and Step-up/Step-down Circuit.
RH5RH