LM1938

HTC Korea LM1938 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive up to 27 LEDs from a 5V supply.
Additional feature includes output voltage limiting when LEDs are disconnected.

LM1938 features :

• Inherently matched LED current
• High Efficiency: 84% typical
• Drives up to 27 LEDs from a 5V supply
• 36V rugged bipolar switch
• Fast 1.3MHz switching frequency
• Variable dead-time provides control over total range
• VOVP(MAX) = 29V
• Moisture sensitivity level 3

LM1938 applications :

• Cellular Phones
• PDAs, handheld computers
• 36V rugged bipolar switch
• MP3 Players
• GPS Receivers