SM8121A Datasheet, PDF (16/19 Pages) Nippon Precision Circuits Inc – White LED Driver IC

6 LEDs
SM8121A
SBD
L
6.8µH
SW
COUT
1.0µF
VDD
ILED
LED
VIN
CIN
4.7µF
VSS
SM8121
FB
CE
R
C_IN: 2012Y5VIC 475Z (TDK)
C_OUT: 2012Y5VIH 105Z (TDK)
L: LQH3N6R8K34 (Murata)
SBD: RB551V-30 (ROHM)
LED: NSCW455 (NICHIA)
100
95
90
85
80
75
70
65
60
55
50
0
VIN=4.5V
VIN=3.6V
VIN=2.3V
5
10 15 20
ILED [mA]
100
95
90
ILED=15mA
85
ILED=5mA
80
75
ILED=2mA
70
65
60
55
50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN [V]
25
20
R=25Ω
15
R=33Ω
10
R=50Ω
5
R=100Ω
R=250Ω
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN [V]
NIPPON PRECISION CIRCUITS INC.—16