ncp5050 ON Semiconductor, ncp5050 Datasheet - Page 2

• Manufacturer Part Number: ncp5050
• Description: 4.5 W Inductive Boost Led Driver For Flash And Lcd Backlight
• Manufacturer: ON Semiconductor

ENABLE
2.8k
CTRL
R1
PCA
5
3
FLASH/TORCH
90
80
70
60
50
40
30
20
10
Band Gap
1.7MHz
0
10
OSC
4.7 mF 0603
PWM CONTROLLER
6.3 V
Figure 3. Simplified Block Diagram
Shut down
Thermal
C1
250k
Figure 2. Typical Efficiency
2.7 to 5.5 V
C
PVIN
http://onsemi.com
in
CM
1
4
NCP5050
I
out
R
100
HCS
HCS
R2
2
(mA)
2.0
2.7 mH
(7.0 V @ 350 mA)
L1
6
V
OVP
out
LCS
= 2 LEDs
8
R3
R
SW
V
LCS
in
10
1 mF 0805 25V
1
= 3.7 V
10.0
PGND
D1
2
7
1000
VS
FB
C2
C
Up to 20 V / 4.5 W
out
D2
D6