ELM901FxA1A 2x Charge Pump LED Driver
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.
| Operation voltage | 2.6 to 4.4V |
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| Current consumption | 300µA(1x), 9mA(2x) |
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| Standby current | Max 1µA |
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| Output current | Max 1A |
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| LED protection | high current lightening timer |
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| Internal LED constant current circuit | external resistance program |
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| Soft-start | LED current start and switch of 1x & 2 x mode |
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| Thermal protection | 150°C |
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| Package | QFN16-4x4,
QFN16-3x3(under development) |
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| Datasheet | ELM901FxA |
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- Application
- Camera light supply
- High luminosity LED flashlight
