YB1520ST25 YOBON [YOBON TECHNOLOGIES,INC.], YB1520ST25 Datasheet

YB1520ST25

Manufacturer Part Number

YB1520ST25

Description

High Power Step-up DC-DC Converter, White LED Driver

Manufacturer

YOBON [YOBON TECHNOLOGIES,INC.]

Datasheet

1.YB1520ST25.pdf (18 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

YB1520ST25

Manufacturer:

YOBON

Quantity:

20 000

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Description

The YB1520 is a step-up DC-DC converter;

operates as current source to drive up to 9

white LEDs in series or 30 white LEDs in

parallel/series configuration. Series connecting

of the LEDs provides identical LED currents

resulting in uniform brightness and eliminating

the need for ballast resistors. The light intensity

of these LEDs is proportional to the current

passing through them. The YB1520 switches at

a fixed frequency of 700KHz, allowing the use

of tiny, low profile inductors and capacitors to

minimize

consideration applications for cellular phone

backlighting or other hand held equipment.

The YB1520 can drive up to 9 white LEDs from

a single Li-Ion battery and drive up to 30 white

LEDs from a 5V. The wide input voltage range

from 2.7V to 16V is ideal for portable and

automotive (5V/12V) applications with higher

conversion

brightness, the LED current can be pulsed by

applying a PWM (pulse width modulated) signal

with a frequency range of 100Hz to 50KHz to

the CTRL pin.

YB1520 has integrated Over Voltage Protection

that prevents damage to the device in case of a

high impedance output due to faulty LED or

open circuit caused by abnormal conditions.

Typical Application Circuit

YB1520 MRev.1.2

footprint

efficiency.

and

High Power Step-up DC-DC Converter, White LED Driver

cost

control

www.yobon.com.tw

space

LED

Features

Applications

Figure 1: Typical Application Circuit

Built-in internal switch

Adjustable output voltage up to 35V

2.7V to 16V input range

<1uA shutdown current

High efficiency

Drives up to 30 white LEDs in

Parallel/series

Over voltage protection

Small 5-Lead SOT-23 package

LCD Display Module

White LED Backlighting

PDAs, GPS terminals

Digital Cameras

Cellular Phone

Electronic Books

Portable Applications

YB1520

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