LN5121 Step-up DC/DC Converter - Backlight Driver

Description

Step-up DC/DC Converter *Backlight Driver LN5121 * General .
The LN5121 Series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular.

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Datasheet Specifications

Part number: LN5121
Manufacturer: natlinear
File Size: 235.68 KB
Datasheet: LN5121-natlinear.pdf
Description: Step-up DC/DC Converter - Backlight Driver

Features

* Input voltage range : 2.5V
* 6V
* Output voltage range : up to 15V externally set-up reference voltage 0.2V
* Oscillation frequency : 1.0MHZ±20%
* On resistance : 2.0Ω
* Efficiency : 88%(When driving 3 white LEDs in series VIN=3.6V ILED=20mA)
* Control : PWM control

Applications

* on cellular phones, PDAs and digital cameras etc. Output voltage of up to 15V can be derived, and from a 2.5V input three white Led’s cab be driven in series. Luminance of the LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin. In addition, an internal MOSFET with a

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LN5121 Step-up Converter Backlight Driver natlinear

natlinear LN5121-like datasheet