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LN2117 - Step-up DC/DC Converter - Backlight Driver

General Description

The LN2117 Series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular phones, PDAs and digital cameras etc.

Key Features

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  • Input voltage range 2.5V.
  • 6V.
  • Output voltage range up to 20V.
  • Oscillation frequency 1MHz±20%.
  • Efficiency 88%(When driving 3 white LEDs in series VIN=3.6V ILED=20mA).
  • Control PWM control.
  • Stand-by Current ISTB=1.0uA(MAX).
  • Load capacitor 0.22uF,ceramic.
  • LX limit Current 300mA.
  • Ordering Information LN2117 ①②③④⑤⑥ Item Symbol ①B ②③④ ⑤ ⑥ 010-149 M R L.

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Datasheet Details

Part number LN2117
Manufacturer natlinear
File Size 316.11 KB
Description Step-up DC/DC Converter - Backlight Driver
Datasheet download datasheet LN2117 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Step-up DC/DC Converter —Backlight Driver LN2117 ■ General Description The LN2117 Series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of up to 20V can be derived, and from a 3.2V input four white Led’s cab be driven in series or alternatively, using a 3.0V input, a network of six LEDs may be driven. Luminance of the LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin. ■ Features  Input voltage range 2.5V—6V  Output voltage range up to 20V  Oscillation frequency 1MHz±20%  Efficiency 88%(When driving 3 white LEDs in series VIN=3.6V ILED=20mA)  Control PWM control  Stand-by Current ISTB=1.