Li - Ion to 6 LED converter
ZXSC400
ISSUE 1 - JANUARY 2003
13
2.5 3.0 3.5 4.0
60
70
80
90
2.5 3.0 3.5 4.0
0
5
10
15
20
25
30
Input Voltage vs LED Current
6WhiteLEDs
I
LED
=20mA
Efficiency (%)
Input voltage (V)
Input Voltage vs Efficiency
6WhiteLEDs
Load Current (mA)
Input Voltage (V)
Ref Value Part Number Manufacture Comments
U1 ZXSC400 Zetex LED driver IC
Q1 FMMT619 Zetex 40V NPN
D1 ZHCS1000 Zetex 1A Schottky diode
L1 22H CMD4D11-220MC Sumida 1mm height profile
R1
47m⍀
LR1206 / RL1220 IRC / Cyntec 1206 / 0805 size
R2
15⍀
Generic Generic 0603 size
C1 2.2F/6V3 GRM Series Murata 0805 size
C2 2.2F/25V GRM Series Murata 1206 size
LED NSCW215 Nichia White SMT LED
Bill of Materials
