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R1280D002A - 2CH PWM DC/DC CONTROLLER

Datasheet Summary

Description

R1280D002A/C Pin No 1 2 Symbol EXT1 GND 3 AMPOUT1 4 DTC1 5 VFB1 6 VFB2 7 DTC2 8 Vrefout 9 VIN 10 EXT2 R1280D002B Pin No 1 2 3 4 5 6 7 8 9 10 Symbol EXT1 GND CE DTC1 VFB1 VFB2 DTC2 Vrefout VIN EXT2 Description External Transistor of Channel 1 Drive Pin (CMOS

Features

  • Input Voltage Range 2.5V to 5.5V.
  • Built-in Latch-type Protection Function by monitoring duty cycle (Fixed Delay Time Typ. 100ms).
  • Oscillator Frequency 700kHz (R1280D002A,B)/200kHz (R1280D002C).
  • Maximum Duty Cycle Typ. 90% (Only applied to R1280D002B Series).
  • High Reference Voltage Accuracy ±1.5%.
  • U. V. L. O. ThresholdTyp. 2.2V (Hysteresis: Typ. 0.1V).
  • Small Package thin SON-10 (package thickness Max. 0.9mm).

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Datasheet Details

Part number R1280D002A
Manufacturer RICOH
File Size 2.02 MB
Description 2CH PWM DC/DC CONTROLLER
Datasheet download datasheet R1280D002A Datasheet
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R1280D002x SERIES 2CH PWM DC/DC CONTROLLER NO.EA-086-160125 OUTLINE The R1280D002x Series are CMOS-based 2-channel PWM Step-up (as Channel 1)/Inverting (as Channel 2) DC/DC converter controllers. Each of the R1280D002x Series consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (UVLO) circuit. A high efficiency Step-up/Inverting DC/DC converter can be composed of this IC with inductors, diodes, power MOSFETs, resisters, and capacitors. Each Output Voltage can be adjustable with external resistors, while soft-start time can be adjustable with external capacitors. Maximum Duty Cycle of R1280D002A and C series can be also adjustable with external resistors.
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