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YOBON TECHNOLOGIES
YOBON TECHNOLOGIES


YB1509

High-Power White LED Driver


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YB1509 pdf
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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
„ 1µs 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
VIN= 6 to14V
10uF
16V
10nF
6.3V
EN
Bypass
Iset
1K
VIN
YB1509
GND
22uH
SL12
4.7uF
35V
LX
BZV55-B 36
FB
2KOHM
Figure 1. Typical application circuit
YB1509 MRev.1.1
www.yobon.com.tw
RFB
60OHM
1



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Pin Configuration
YB1509
High-Power White LED Driver
GND
1
8 LX
VIN 2
Bypass 3
YB 1509
7 Iset
6 NC
FB 4
5 EN
M SOP8
Figure 2. Pin configuration
Pin Description
Table 1
Pin Name
Description
1 GND Signal and power ground.
2 VIN Input supply pin.
3 Bypass Internal compensation usage. A 10nF bypass capacitor is recommended.
4 FB Feedback input pin.
5 EN Enable control input. Active high.
6 NC No connect.
7 ISET Set inductor current.
8 LX Switch pin, connect to external inductor.
Ordering Information
Order Number
Package Type
YB1509
MSOP-8
Supplied as
Package Marking
2500 units Tape & Reel
YB1509
YB1509 MRev.1.1
www.yobon.com.tw
2



Part Number YB1509
Description High-Power White LED Driver
Maker YOBON TECHNOLOGIES - YOBON TECHNOLOGIES
Total Page 7 Pages
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