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The IS31LT3948 is a PFM step-up DC-DC converter designed for driving the white LED arrays for large size LCD panel backlighting applications. It can deliver stable constant output current from a few milliamps up to 2A, programmed via an external resistor. The IS31LT3948 utilizes a control scheme in which the output is automatically adjusted to the optimum ou.
external PWM dimming, which allows the flexible control of the back-lighting luminance. The IS31LT3948 has a wide input voltage range from 5V to 100V (Note). An integrated OVP circuit protects the chip and the system even under no-load conditions. Note: The IS31LT3948 has an internal 5V shunt regulator connected to the VCC pin. A dropping resistor must be connected between the VCC pin and VIN to limit current flow. VIN voltages above 100V are allowed but care must be taken to ensure that the output voltage remains greater than VIN, and that the NMOS voltage rating is sufficiently large. FEATU.
IS31LT3948 - Lumissil
The IS31LT3948 is a PFM step-up DC-DC converter designed for driving the white LED arrays for large size LCD panel backl.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | IS31LT3910 |
ISSI |
UNIVERSAL HIGH BRIGHTNESS LED DRIVER |
|
| 2 | IS31LT3916 |
ISSI |
Offline LED driver |
|
| 3 | IS31LT3918 |
ISSI |
HIGH VOLTAGE LED LIGHTING DRIVER |
|
| 4 | IS31LT3929 |
ISSI |
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|
| 5 | IS31LT3932 |
ISSI |
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|
| 6 | IS31LT3935 |
ISSI |
TRIAC Dimmable AC/DC LED Driver |
|
| 7 | IS31LT3938 |
Lumissil |
HIGH VOLTAGE LED LIGHTING DRIVER |
|
| 8 | IS31LT3938 |
ISSI |
High Voltage LED Lighting Driver |
|
| 9 | IS31LT3952 |
Lumissil |
CONSTANT-CURRENT 1.5-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER |
|
| 10 | IS31LT3953 |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER |
|
| 11 | IS31LT3954A |
Lumissil |
CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER |
|
| 12 | IS31LT3957A |
Lumissil |
HIGH VOLTAGE LED LIGHTING CONTROLLER |
|