YB1509

www.DataSheet4U.com YB1509 High-Power White LED Driver 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 Description The YB1509 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 YB1509 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 Applications „ PDA, Palmtops and Smart Phones „ LCD Monitor „ LCD TV „ Portable DVD player „ White LED backlighting „ GPS navigation system „ Handheld Game Typical Application Circuit VIN= 6 to14V 10uF 16V 22uH SL12 VIN 4.7uF 35V EN Bypass Iset LX YB1509 FB BZV55-B 36 2KOHM 10nF 6.3V GND 1K RFB 60OHM Figure 1. Typical application circuit YB1509 MRev.1.1 www.yobon.com.tw 1 www.DataSheet4U.com YB1509 High-Power White LED Driver Pin Configuration G ND 1 8 LX VIN 2 7 Iset YB 1509 B ypass 3 6 NC FB 4 ...