A8480EEJTR-T

A8480EEJTR-T Datasheet


A8480 Boost Regulator for Display Bias or LED Driver

Part Datasheet
A8480EEJTR-T A8480EEJTR-T A8480EEJTR-T (pdf)
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A8480 Boost Regulator for Display Bias or LED Driver

Discontinued Product

These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available.

Date of status change November 2, 2009

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A8480 Boost Regulator for Display Bias or LED Driver

Output disconnect during shutdown 1 uA shutdown current
to 9 V input Operate with 1 or 2 Li+ battery input supply Output voltage up to 23 V MHz switching frequency A switch current limit Internal overvoltage and overtemperature protection,
and soft start

Package:
9-pin CSP suffix CG
10-pin MLP/DFN suffix EJ with exposed thermal pad

Approximate Scale 1:1

TheA8480 is a MHz optimized boost converter with internal soft-start and compensation to support WLED, flash/torch, and display bias applications. The input voltage range of to 9 V supports either 1 or 2 Li-ion battery applications. The high voltage integrated double-diffused MOSFET DMOS allows output voltages as high as 23 V with a switch current limit of A, this increases the maximum quantity of LEDs that can be used in series.

To maximize battery life in the application, the output can be completely disconnected from the battery voltage to virtually eliminate leakage current in the system. The disconnect switch can pass up to 80 mA current. For system protection, the A8480 has internal overtemperature and overvoltage protection.

The A8480 can be used as a general purpose boost converter by taking power through the CAP pin. In this configuration, it can provide up to 520 mA at 12 V with V input voltage.

The A8480 is available in both mm x mm, mm nominal height CSP, and 3 mm x 3 mm, mm nominal height MLP/DFN packages.

Applications include WLED flash/torch WLED backlight OLED bias supplies LCD bias supplies General purpose boost converter

VSUPPLY to 5 V

L1 22 uH

MBRA130LT3 VOUT

CIN 1 uF V

EJ only

B1[3] A8480

VIN [1] [PGND]

SW A3[10]

B2[2] FB[FB1]

CAP A2[9]

RADJ kΩ

FBADJ C1[4]

DIM C2[5]

OUT1 B3[8]

GND A1[7]

ON1 C3[6]
48 kΩ

COUT uF 16 V
30 Ω

VSUPPLY

EJ only

B1[3] A8480

VIN [1] [PGND]
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Datasheet ID: A8480EEJTR-T 516080