Maximum brightness solution
(Notes)
VBATT
L1
U1
VCC
VDRIVE
STDN
I SENSE
G ND
ZXSC310
D1
Q1 ZHCS1000
FMMT617
D2
C1
R1
This circuit provides a continuous current output to the
LED by rectifying and buffering the DC-DC output. This
ensures maximum LED brightness.
ZXSC310
Materials list
Ref
Value
U1
N/A
Q1
N/A
D1
1A
R1
100m⍀
C1
2.2F
L1
100µH8
8See Application section.
Part Number
ZXSC310E5
FMMT617
ZHCS1000
Generic
Generic
Manufacture
Zetex Plc
Zetex Plc
Zetex Plc
Various
Various
PROVISIONAL ISSUE A - SEPTEMBER 2001
7
Comments
Single cell converter, SOT23-5
Low VCE(sat) NPN, SOT23
1A Shottky diode, SOT23
0805 Size
Low ESR ceramic capacitor
Surface mount inductor