Description

The YB1519 is a high-power boost converter. An adjustable current limit, wide range of input voltage, and up to 40V of switch voltage are designed to drive white LEDs back-lighting for large LCD panel. It can drive up to 10 LEDs in series or 18 LEDs in parallel/series configuration.

The wide application VIN range makes YB1519 suitable for many types of battery applications such as Li-ions, Alkaline, or Sealed Lead Acid batteries. The adjustable inductor current optimizes the performance for different output drive capability by an external resistor.

The LED current is set by a resistor connected to FB pin. The On/Of duty with clock frequency from 1K to 100KHz at EN pin can control the LED brightness

Features

■ 2V to 16V Input Voltage

■ 40V Maximum Output Voltage

■ Drive up to 18 White LEDs

■ Adjustable Inductor Current

■ 1μs Constant Off-time PFM Control

■ 1KHz to 100KHz PWM Dimming Control

Applications

■ High Power WLED Backlight Solution

■ LCD Monitor

■ LCD TV

■ Car TV, Portable DVD

■ GPS navigation system

■ Handheld Game