LT3498EDDB#TRPBF Linear Technology, LT3498EDDB#TRPBF Datasheet - Page 22

• Manufacturer Part Number: LT3498EDDB#TRPBF
• Description: IC LED DRVR WT/OLED BCKLGT 12DFN
• Manufacturer: Linear Technology
• Type: Backlight, OLED, White LEDr

Specifications of LT3498EDDB#TRPBF

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: OLED, White LED
• Frequency: 1.8MHz ~ 2.8MHz
• Voltage - Supply: 2.5 V ~ 12 V
• Voltage - Output: 32V
• Mounting Type: Surface Mount
• Package / Case: 12-DFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -

LT3498
TYPICAL APPLICATIONS
22
80
75
65
55
50
70
60
0
1μF
C1
5
V
IN
LED Effi ciency,
LED CURRENT (mA)
C
C1: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN TMK316BJ106ML
D1: CENTRAL SEMICONDUCTOR CMDSH-3
L1: MURATA LQH32CN150K53
L2: MURATA LQH32CN100K53
= 3.6V, 6 LEDs
IN
, C2: X5R OR X7R WITH SUFFICIENT VOLTAGE RATING
10
R
10Ω
SENSE1
20mA
Li-Ion to Six White LEDs and OLED/LCD Bias
15
CAP1
LED1
3498 TA06b
DIMMING CONTROL
SHUTDOWN AND
V
SW1
IN
20
OFF
CTRL1
= 3V TO 5V
15μH
ON
L1
GND1
V
IN
LT3498
10μH
GND2
L2
C
4.7μF
SHUTDOWN AND
IN
SW2
CONTROL
OFF
CTRL2
D1
ON
CAP2
80
55
50
45
40
75
70
65
60
0.1
OLED Effi ciency and Power Loss
V
FB2
OUT2
V
LOAD FROM V
LOAD FROM CAP2
POWER LOSS FROM V
POWER LOSS FROM CAP2
IN
C2
0.47μF
= 3.6V, V
LOAD CURRENT (mA)
1
R
2.21MΩ
FB2
OUT2
3498 TA06
OUT2
C3
10μF
16V
24mA
OUT2
10
= 16V
3498 TA06c
100
400
350
300
250
200
150
100
50
0
3498fa