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YB1509 Datasheet

  • YB1509

  • High-Power White LED Driver

  • 7頁

  • YOBON

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YB1509
High-Power White LED Driver
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
Features
2V to 16V Input Voltage
40V Maximum Output Voltage
Drive up to 18 White LEDs
Adjustable Inductor Current
1碌s Constant Off-time PFM Control
1KHz to 100KHz PWM Dimming Control
Applications
PDA, Palmtops and Smart Phones
LCD Monitor
LCD TV
Portable DVD player
White LED backlighting
GPS navigation system
Handheld Game
Typical Application Circuit
V
IN= 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

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