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YB1315 Datasheet(PDF) 6 Page - YOBON TECHNOLOGIES,INC.

Part No. YB1315
Description  High Efficiency Charge Pump White LED Driver
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Maker  YOBON [YOBON TECHNOLOGIES,INC.]
Homepage  http://www.yobon.com.tw
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YB1315 Datasheet(HTML) 6 Page - YOBON TECHNOLOGIES,INC.

 
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Preliminary YB1315
High Efficiency Charge Pump White LED Driver
YB1315 Rev.0.1
www.yobon.com.tw
6
1x/1.5x
Charge Pump
10
11
9
12
8
13
Current Sinks
2
3
4
5
6
Control
1
15
16
14
7
C1+
EN1
EN2
C1-
C2+
C2-
VIN
GND
ISET
D5
D4
D3
D2
D1
PGND
VOUT
OVP
UVLO
Reference
Function Block
Figure 3: Function Block
Functional Description
The YB1315 uses a multi-mode fractional
charge pump to generate a supply voltage
and a precise sink circuitry to ensure a
constant driving current for each LED. The
charge pump operates in either 1x mode,
or 1.5x mode, depending on the input
voltage and output current loading. The
overall
power
consumption
is
best
optimized
by
automatically
switching
among the 2 different operation mode.
The charge pump is possible to generate a
total output current of 125mA or more,
25mA for each LED. But it is recommended
to operate the device under total 120mA.


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