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Related Links:

Datasheets:
A8481: Dual Output Boost Regulator Using Single Inductor (PDF)

Selection Guides:
Power Management ICs: Display Power and Backlight

when this product is updated

A8481
Dual Output Boost Regulator Using Single Inductor

Features

• Two independently controlled channels for dual display
• Output voltage up to 23 V
• 2.7 to 9 V input
• Output disconnect allows less than 1 µA supply current during shutdown
• Single-pin dimming control for WLED
• 1.2 MHz switching frequency
• 1.5 A switch current limit
• OVP, Pulse-by-Pulse OCP, OTP, and Soft Start

Applications

• Dual-panel cellular phone with OLED and WLED backlight
• Personal Digital Assistant (PDA)
• Camcorder, personal stereo, MP3 player, camera

Description

The A8481 is a step-up dc-to-dc converter in a thermally-enhanced MLP package. A constant 1.2 MHz switching frequency, with current-mode control scheme, provides stable low-noise operation at high load conditions.

The A8481 is a dual output OLED + WLED driver. This device is suitable for driving OLED bias supply as well as WLEDs for backlight. For OLED it is capable of delivering 80 mA at 18 V, and can drive five WLEDs at 20 mA.

Independent output control and output disconnect make this IC ideally suited for battery operated, dual display portable applications. The IC disconnects input from the output path during shutdown, allowing shutdown currents less than 1 µA.

The A8481 is available in a 10-pin 3 mm × 3 mm MLP package that has a nominal height of only 0.75 mm.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A8481EEJTR-T	10-lead MLP	Yes	view data	-40 °C to  85 °C	new	Contact Local Sales Representative

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.