The IS32LT3957A is a current mode PWM controller designed to drive a low side external NMOS FET for wide input/output voltage range and high LED current applications. An external resistor senses the high side output current of the LED string. A high side sense is the most flexible current sensing scheme, since it functions in either boost or buck-boost mode .
Wide high voltage input range: 5V to 75V
Supports boost, buck-boost, SEPIC and buck
topology
±3.5% output current accuracy over -40°C ~
+125°C temperature
Adjustable operating frequency range of
100kHz~1MHz
Programmable soft start to avoid inrush current
Fixed under voltage lockout threshold
EMI reduction capabilities
- Programmable spread spectrum function - Operating frequency synchronization with
external clock source
Supports either analog or PWM dimming
Fault protection with reporting:
- VCC under voltage lockout (not reported) - Programmable output over voltage protecti.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | IS32LT3952 |
Lumissil |
CONSTANT-CURRENT 1.5-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
2 | IS32LT3953 |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
3 | IS32LT3953 |
ISSI |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
4 | IS32LT3953B |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
5 | IS32LT3954 |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
6 | IS32LT3954A |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER | |
7 | IS32LT3958 |
Lumissil |
HIGH VOLTAGE LED LIGHTING CONTROLLER | |
8 | IS32LT3958A |
Lumissil |
HIGH VOLTAGE LED LIGHTING CONTROLLER | |
9 | IS32LT3965 |
Lumissil |
1.5-AMPERE PWM DIMMABLE SYNCHRONOUS BUCK LED DRIVER | |
10 | IS32LT3117 |
ISSI |
4-CHANNEL CONSTANT CURRENT REGULATOR | |
11 | IS32LT3120 |
Lumissil |
LINEAR LED DRIVER | |
12 | IS32LT3120 |
ISSI |
LINEAR LED DRIVER |