natlinear LN5921
The LN5921 is a high performance ultra low- dropout constant current bias supply for white LEDs. It can be used as an alternative to the simple ballast resistors in conventional parallel white LEDs applications. For dimming control, an enable input pin is controlled by processor GPIO output pulses for 32 level linear current.| Part No. | LN5921 |
|---|---|
| Datasheet | LN5921 Download |
| Manufacturer | natlinear |
| Description | Constant-Current White LED Bias |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Using a low frequency PWM waveform to this enable input pin also controls the average LED current which is proportional to the PWM duty. The LN5921 is suitable for single cell Li-ion bat-tery power device that using low forward voltage white LEDs. The white LEDs can be powered directly from battery without extra external components. This takes an advantage of highest efficiency and creates no EMI problem.●
APPLICATIONS
● Mobile Phones● White LED backlighting
● Camera Flash LED Lighting
● Ordering Information LN5921 ①② (Eg: LN5921SR) Item ① ② Symbol S Q M D R L
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FEATURES
● Ultra Low 200mV Dropout at 20mA● 0.6% High Accuracy Current Matching
● 20mA Full Scale Current
● 32 Level Linear Current Brightness Control
● PWM Brightness Control
● 2.5V to 5.5V Supply Voltage Range
● Thermal shutdown function
● Under-voltage protection function
● Package
● SOT-23-8L
● MSOP-8
● QFN3×3-16 Function Denotes Package Type: SOT23-8L Denotes Package Type: QFN3×3-16 Denotes Package Type: MSOP-8 Customer requirements Embossed Tape :Standard Feed Embossed Tape :Reverse Feed Rev.1.0 — June.
