Allegro MicroSystems A8431
The A8431 is a noninverting boost dc-dc converter that provides a programmable constant current output up to 32 V for driving white LEDs in series.The A8431 also offers an OVP (overvoltage protection) pin. The A8431 incorporates a power switch and a feedback sense amplifier to provide a solution with minimum external components. The A8431 is provided in a 0.75 mm high, 6-pin, 2 x 3 mm MLP package.- Min Voltage : 2.5V
- Max Voltage : 10V
- Max Operating Temp : 85°C
- Min Operating Temp : -40°C
Source:
Octopart
| Part No. | A8431 |
|---|---|
| Datasheet | A8431 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | White LED Driver Constant Current Step-up Converter |
| Buy | Stock & Price |
FEATURES
Output voltage up to 32 V (OVP level) 2.5 V to 10 V input Drives up to 4 LEDs at 20 mA from a 2.5 V supply Drives up to 5 LEDs at 20 mA from a 3 V supply 1.2 MHz switching frequency 300 mA switch current limit 1 µA shutdown current OVP pin eliminates the need for an external Zener diode on the outputABSOLUTE MAXIMUM RATINGS
SW Pin ................................................–0.3 V to 36 V OVP Pin ..............................................–0.3 V to 36 V Remaining Pins .................................. –0.3 V to 10 V Ambient Operating Temperature, TA....... –40°C to 85°C Junction Temperature, TJ(max)............................... 150°C Storage Temperature, TS .................... –55°C to 150°CAPPLICATIONS
LED backlights Portable battery-powered equipment Cellular phones PDAs (Personal Digital Assistant) Camcorders, personal stereos, MP3 players, cameras Mobile GPS systems Use the following complete part numbers when ordering: Part Number A8431EEH-T Package 6-pin, ML...
