L1937 Datasheet, PDF (5/7 Pages) Unisonic Technologies – WHITE LED STEP-UP CONVERTER

UTC L1937
LINEAR INTEGRATED CIRCUIT
VIN
5V
CIN
1DŽF
L
22DŽH
D
VDC
DIMMING
VIN
SW
90k
SHDN FB
GND
5k
R1
4Ƹ
85
COUT
80
0.22DŽF
75
70
Seven LED Efficiency
5V to Seven White LEDs
65
0
5
10
15
LOAD CURRENT (mA)
VIN
3V ~ 5V
CIN
1DŽF
L
22DŽH
D
VDC
DIMMING
VIN
SW
90k
SHDN FB
GND
5k
R1
4Ƹ
Four LED Efficiency
85
COUT
0.22DŽF
80
VIN=3V
75
VIN=3.6V
70
Li-Ion to Four White LEDs
65
0
5
10
15
20
LOAD CURRENT (mA)


UTC UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R103-021,A