The IS31LT3505 is a constant current step-up converter with internal NMOS. The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness as well as constant output voltage to drive other devices. The output current of each channel can be set by an external resistor and dimming the brightnes.
6V to 30V supply voltage
High efficiency: 90 % typical
PWM dimming control
Fast 1.0MHz switching frequency
Internal high power 35V NMOS
Internal soft start
Adjustable LED Open Protection
Over-temperature protection
MSOP-10 APPLICATIONS
TV monitor backlighting
PDA, handheld computer
GPS receiver
TYPICAL APPLICATION CIRCUIT
L1 10μ H 300Ω 100kΩ D1 (Schottky,ss26)
6.0V~30V
4 9
EN VDD
LX OVP VP
10
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R1
6 2
C3 1 μF R2 C OUT 22μ F
C IN 22μ F
C1 1μF
IS31LT3505
C2 1μF
10nF 10 μF
1, 3, 5
GND
FB
7
R SE T
Figure 1 Application Circuit (Cons.
The IS31LT3505 is a constant current step-up converter with internal NMOS. The step-up converter topology allows series .
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | IS31LT3515 |
ISSI |
High Voltage LED Lighting Driver | |
2 | IS31LT3117 |
Lumissil |
4-CHANNEL CONSTANT CURRENT REGULATOR | |
3 | IS31LT3117 |
ISSI |
4-CHANNEL CONSTANT CURRENT REGULATOR | |
4 | IS31LT3135 |
ISSI |
MAIN/SUB DUAL-CHANNEL LED DRIVER | |
5 | IS31LT3170 |
Lumissil |
10-TO-150MA CONSTANT-CURRENT LED DRIVER | |
6 | IS31LT3170 |
ISSI |
10-TO-150MA CONSTANT-CURRENT LED DRIVER | |
7 | IS31LT3171 |
Lumissil |
10-TO-150MA CONSTANT-CURRENT LED DRIVER | |
8 | IS31LT3171 |
ISSI |
10-TO-150MA CONSTANT-CURRENT LED DRIVER | |
9 | IS31LT3172 |
Lumissil |
10-TO-200MA CONSTANT-CURRENT LED DRIVER | |
10 | IS31LT3173 |
Lumissil |
10-TO-200MA CONSTANT-CURRENT LED DRIVER | |
11 | IS31LT3177 |
Lumissil |
10-TO-200MA CONSTANT-CURRENT LED DRIVER | |
12 | IS31LT3178 |
Lumissil |
10-TO-200MA CONSTANT-CURRENT LED DRIVER |