R1282D002A Datasheet, PDF (11/18 Pages) RICOH electronics devices division – 2CH PWM DC/DC CONTROLLER

R1282D002A
EXT1
OSCILLOSCOPE
EXT1
C1
GND
VIN
C2
Vrefout
OSCILLOSCOPE
C1
GND
VIN
C2
Vrefout
DTC1 DTC2
VFB1
VFB2
DTC1 DTC2
VFB1
VFB2
Test Circuit 7
Test Circuit 8
EXT2
OSCILLOSCOPE
C1
GND
VIN
C1
Vrefout
C2
DTC1 DTC2
VFB1
VFB2
GND
VIN
A ^AMPOUT1
Vrefout
C2
DTC1 DTC2
VFB1
VFB2
Test Circuit 9
Test Circuit 10
Typical Characteristics shown in the following pages are obtained with test circuits shown above.
Test Circuit 1,2 :
Test Circuit 3 :
Test Circuit 4 :
Test Circuit 5 :
Test Circuit 6 :
Test Circuit 7 :
Test Circuit 8 :
Test Circuit 9 :
Test Circuit 10 :
Typical Characteristic 4)
Typical Characteristic 5)
Typical Characteristic 5)
Typical Characteristic 6)
Typical Characteristics 7) 8)
Typical Characteristic 9)
Typical Characteristic 10)
Typical Characteristics 10)
Typical Characteristics 11) 12)
Note) Capacitors' values of test circuits
Capacitors: Ceramic Type:
C1=4.7µF, C2=1.0µF
Efficiency η(%) can be calculated with the next formula:
η=(VOUT1×IOUT1+VOUT2×IOUT2)/(VIN×IIN)×100
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