1

Parameter

Symbol

Limit

Unit

VIN voltage

Vin

GND-0.3 to 6

V

VO voltage

Vo

GND-0.3 to 6

V

EN1,EN2 voltage

Ven

GND-0.3 to Vin+0.3

V

VO current, LED current

Io, Iled

1500 *

mA

Operating temperature

Top

-40 to +85

°C

Storage temperature

Tstg

-40 to +125

°C

ELM901FxA-S

Symbol

a

Package

F: QFN

b

Package type

A: QFN16-4x4

B: QFN16-3x3(under development)

c

Product version

A

d

Taping direction

S: Refer to PKG file

ELM901 F x A - S

↑ ↑ ↑ ↑

a b c d

■General description

■Features

■Maximum absolute ratings

■Selection Guide

• Camera light supply

• High luminosity LED flashlight

■Application

11 -

• Low voltage operation

: 2.6V-4.4V

• Low power operation

: 300μA(1x), 9mA(2x)

• Low standby current

: Max.1μA

• Large output current

: Max.1A

• LED protection

: high current lightening timer

• Internal LED constant current circuit

: external resistance program

• Soft-start

: LED current start and switch of 1x & 2x mode

• Package

: QFN16-4x4,

QFN16-3x3(under development)

• Thermal shutdown function included

ELM901FxA is a high current LED driver with internal automatic mode switch pump circuit of pass-through

mode (1x mode) and boost charge mode (2x mode) and constant current drive circuit; maximum output current

of ELM901 series can reach 1A. ELM901 series is ideally suited for high luminosity white LED electrical

applications which are powered by 1-cell lithium-ion/polymer battery. The required external parts of ELM901

series can be limited to the minimum of 3 capacitors and 3 programming resistors. With 4mm x 4mm & 3mm x

3mm QFN package, ELM901 series is possible to be assembled within limited space.

The sink current, which can be switched to 3 different kinds by enable signal during operation,of LED pin is

set by external programming resistors. For LED protection, it is possible to set high current lighting timer with

external resistor; the light will be turned off forcibly by timer (3 options among 0.2 sec. to 1 sec.).

Built-in soft-start circuitry makes ELM901 series be able to limit excessive power during start-up and switch

of 1x & 2x mode.

* Based on long-term current denslty limitations. Assumes an operating duty cycle of ≤ 10% under absolute maximum conditions for

durations less than 10 seconds. Max current for continuous operation is 600mA.