ELM901F-SERIES Datasheet, PDF (1/11 Pages) ELM Electronics – 1A 2x Charge Pump LED Driver

ELM901FxA 1A 2x Charge Pump LED Driver
■General description
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.
■Features
■Application
• Low voltage operation : 2.6V-4.4V
• Camera light supply
• Low power operation
: 300μA(1x), 9mA(2x)
• High luminosity LED flashlight
• 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
■Maximum absolute ratings
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
* ^{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.
■Selection Guide
ELM901FxA-S
Symbol
a
Package
b
Package type
c
Product version
d
Taping direction
F: QFN
A: QFN16-4x4
B: QFN16-3x3(under development)
A
S: Refer to PKG file
ELM901 F x A - S
↑↑↑ ↑
abc d
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