The IS31LT3952 is a DC-to-DC switching converter that integrates an N-channel MOSFET to operate in a buck configuration. The device can operate from a wide input voltage between 4.5V and 38V and provides a constant current of up to 1.5A for driving a single LED or multiple series connected LEDs. The external resistor, RISET, is used to set a constant LED out.
Wide input voltage supply from 4.5V to 38V - Withstand 40V load dump
True average output current control
1.5A maximum output over operating temperature
range
Cycle-by-cycle current limit
Integrated high-side MOSFET switch
Dimming via direct logic input or power supply
voltage
Internal control loop compensation
Under-voltage lockout (UVLO) and thermal
shutdown protection
2μA low power shutdown
Spread spectrum to optimize EMI
Robust fault protection:
- Pin-to-GND short - Component open/short faults - Adjacent pin-to-pin short - LED open/short - Thermal shutdown
APPLICATIONS.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | IS31LT3953 |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
2 | IS31LT3954A |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
3 | IS31LT3957A |
Lumissil |
HIGH VOLTAGE LED LIGHTING CONTROLLER | |
4 | IS31LT3910 |
ISSI |
UNIVERSAL HIGH BRIGHTNESS LED DRIVER | |
5 | IS31LT3916 |
ISSI |
Offline LED driver | |
6 | IS31LT3918 |
ISSI |
HIGH VOLTAGE LED LIGHTING DRIVER | |
7 | IS31LT3929 |
ISSI |
Flyback configuration LED driver | |
8 | IS31LT3932 |
ISSI |
High PF universal LED Driver | |
9 | IS31LT3935 |
ISSI |
TRIAC Dimmable AC/DC LED Driver | |
10 | IS31LT3938 |
Lumissil |
HIGH VOLTAGE LED LIGHTING DRIVER | |
11 | IS31LT3938 |
ISSI |
High Voltage LED Lighting Driver | |
12 | IS31LT3948 |
Lumissil |
PFM MODE BOOST LED DRIVER |