A8483: 1.2 MHz Step-up Converter for Display Bias Supply

The A8483 is a simple five-pin 1.2 MHz current-mode step-up dc-to-dc converter. It includes an integrated 36 V FET and comes in a small 3 x 3 mm 10-lead thermally enhanced MLP/TDFN lead- (Pb) free package. It can be used in many applications (see datasheet circuits). For example, it delivers 15 V at 15 mA with 2.7 V input. Input voltage can range from 2.5 V to 10 V when connected directly to a battery or input rail. Output voltage can be set up to 35 V. Smaller external components and the integrated switch reduce component count and footprint for a variety of applications.

Applications include:

  • OLED bias supply / WLED backlight
  • Portable battery-powered equipment
  • Cellular phones
  • PDAs (Personal Digital Assistant)
  • Camcorders, personal stereos, MP3 players, cameras
  • Mobile GPS system
DATASHEETS
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  • Output voltage up to 35 V
  • 2.5 to 10 V input
  • 0.9 to 18 V input with separate bias supply
  • Delivers 15 V at 15 mA with 2.7 V input
  • Constant 1.2 MHz switching frequency provides low noise
  • 350 mA switch current limit
  • 1 µA shutdown current
  • Low-noise PWM/analog dimming

The A8483 is supplied in a 3 x 3 mm 10-lead thermally enhanced MLP/TDFN lead- (Pb) free package (suffix EK).

EK MLP/TDFN 5 lead

 

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Product Image Functional Block Diagram Pinout Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A8483EEK-T 5-lead MLP -40 ° C to 85 ° C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A8483EEKTR-T 5-lead MLP -40 ° C to 85 ° C Yes View Data Contact your
local sales rep
Check
Distributor Stock
APEK8483EEK-01 DEMO BOARD -40 ° C to 85 ° C No -- Contact your
local sales rep
Check
Distributor Stock

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.

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