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RH5RH552B-T1 Datasheet(PDF) 27 Page - RICOH electronics devices division

Part # RH5RH552B-T1
Description  PWM STEP-UP DC/DC CONVERTER
PDF  29 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

RH5RH552B-T1 Datasheet(HTML) 27 Page - RICOH electronics devices division

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26
VIN
Inductor
Diode
OUT
Vss
VOUT
+
Capacitor
EXT
ZD:6.8V
RH5RH502B
Tr
Cb
RZD
Rb
Starter Circuit
(Note) When the Output Current is small or the Output Voltage is unstable,use the Rzd for flowing the bias current through the Zener diode ZD.
FIG. 6
VIN
Inductor
Diode
OUT
Vss
VOUT
+
Capacitor
RH5RH
××1A
Tr
PNP
Lx
Rb1
Rb2
Starter Circuit
(Note) When the LX pin Voltage is over the rating at the time PNP Tr is OFF,use a RH5RH
××2B and drive the PNP Tr. by the external NPN Tr.
FIG. 7
APPLICATION CIRCUITS
• 12V Step-up Circuit
RH5RH
• Step-down Circuit



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