KB4312 Datasheet, PDF (5/9 Pages) Kingbor Technology Co – Tiny Package, High Performance, Constant Current Switching Regulator for White LED

Kingbor Technology Co.,Ltd
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APPLICATION CIRCUIT
Vin=2.7~6V
10uH
VOUT=6~24V
KB4312
1uF
1N5819
1uF
1
LX
6 _{VCC OVP} 5
KB4312B
PWM or ON/OFF
4 _EN
FB ³
GND
2
240mV
Figure 1a.KB4312 For 2 to 6 LEDs Back Light Unit.(Step-Up)
20MA
Rset
12R~51R
Vin=2.7~6V
1uF
ON/OFF
BAT54s
1
1uF
3
2
10uH
1N5819
1
LX
5 _VCC
FB ³
KB4312A
4 _EN
GND
2
R1
510K
1.27V
R2
47K
2.2K
-10V
1uF _10V
10uF
VOUT +15V (15mA)
10uF
R1= (
VOUT
1.27V
-1 ) x R2
Vin=5~20V
1K _1uF
5.1V
1uF
ON/OFF
10uH
1
1uF ₃
2
BAT54s
1uF
1
3
2
2.2K
1uF _10V
-10V
10uF
VOUT +15V(15mA)
1
LX
5 _VCC
R1
510K
FB ^{3 1.27V}
KB4312A
4 _EN
R2
GND
47K
2
10uF
R1= (
VOUT
1.27V
-1 ) x R2
5