YB1313 Datasheet, PDF (8/9 Pages) YOBON TECHNOLOGIES,INC. – 1x/1.5x/2x Charge Pump for White LED Application

YB1313
1x/1.5x/2x Charge Pump for White LED Application
η = ^POUT = ^{VOUT × IOUT} ×100%
P_IN
V_IN × I _IN
I _IN = I_OUT + I_Q
η = ^POUT =
V_OUT × I_OUT
×100%
P_IN V_IN × (I_OUT × Mode + I_Q )
Mode = 1.5 or 2
And then LEDs efficiency is defined as LED
forward voltage produces output current
divided by input power:
η = ^POUT =
V_F × I_OUT
×100%
P_IN V_IN × (I_OUT × Mode + I_Q )
Capacitor Selection
Ceramic capacitors such as X5R or X7R are recommended to be used with the YB1313. For the two
flying capacitors C1 and C2, it is important to use low ESR capacitors to avoid unnecessary
efficiency losses. Low ESR capacitors on VOUT reduce the ripple voltage on the supply of the
current sources. Table 5 lists capacitor types that have been tested with the YB1313.
Table 5. Recommended Capacitors and WLED
Part
Value Voltage
C1608X5R1A105KT000E
1μF
10V
C1608X7R1A105KT0S0N
1μF
10V
C2012X7R1C225KT000N 2.2μF
16V
ECJ1VB1A105K
1μF
10V
ECJ2FB1A105K
1μF
10V
ECJ2FB1A225K
LTW-193TS5
2.2μF
16V
－
－
Manufacturer
TDK
Panasonic
Lite-On
Size
0603
0805
0805
0603
0805
0805
－
Website
www.component.tdk.com
www.panasonic.com
www.liteon.com.tw
YB1313 MRev.1.1
www.yobon.com.tw
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