ETA1617

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Powering Minds of the Smarts

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1

40V Boost Converter for LED driver / TFT Bias / USB Power

DESCRIPTION

The ETA1617 is a high efficiency step-up converter with an

internally integrated 40V power MOSEFT. It runs with an

optimal 0.8MHz frequency that enables use of small external

components while still providing best efficiencies. It has an

internal current limit as high as 1A, and it can drive up to 10

LEDs at 50mA output current. The incorporated 25-100KHz

true PWM-Dimming feature by EN pin can be used to digitally

program the LED current. For maximum protection, the

ETA1617 has an internal OVP protection at 38V to prevent the

chip from damages when the LED string is not connected to

the output.

ETA1617 is available in a space-saving SOT23-6 package.

FEATURES



Up to 91% Efficiency (6 LEDs)



Drive up to 10 LEDs with 50mA



Drive up to 40 LEDs in total



38V OVP protection



True PWM Brightness Control



200mV Feedback Voltage



1A current limit



SOT23-6 Package

APPLICATIONS



Cellphone and Smartphone



MID or Tablet PC



TFT-bias for LCD screen



Power for OLED



LED torch



Satellite Set Top Box

TYPICAL APPLICATION

OFF

ON

EN

GND

FB

SW

ETA1617

2.7V to 6V

4.7μF

15μH

2

4

1

3

4.7μF

IN

6

EN Or PWM dimming

Max.

10LEDs

Application for LED Backlight Driving