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| LT3498_15 Datasheet, PDF (18/24 Pages) Linear Technology – 20mA LED Driver and OLED Driver with Integrated Schottky | |||
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LT3498
TYPICAL APPLICATIONS
Li-Ion to Two White LEDs and OLED/LCD Bias
VIN = 3V TO 5V
CIN
4.7μF
C2
0.47μF
C1
L1
L2
1μF
10μH
10μH
20mA
CAP1 SW1
VIN
SW2 CAP2 VOUT2
LT3498
16V
24mA
C3
10μF
LED1 CTRL1 GND1 GND2 CTRL2
RSENSE1
10Ω
OFF ON
SHUTDOWN
AND
DIMMING
CONTROL
OFF ON
SHUTDOWN
AND
CONTROL
FB2
RFB2
2.21MΩ
3498 TA02
CIN, C2: X5R OR X7R WITH SUFFICIENT VOLTAGE RATING
C1: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN TMK316BJ106ML
L1, L2: MURATA LQH32CN100K53
LED Efï¬ciency
VIN = 3.6V, 2 LEDs
75
70
65
60
55
50
45
40
0
5
10
15
LED CURRENT (mA)
20
3498 TA02b
3498fa
18
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