General Description
AP9235 is DC/DC step-up converter that deliver an accurate constant current for driving LEDs. Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor. The AP9235 is ideal for driving up to eight white LEDs in series or up to 30V.
Ordering Information
Package Code Temperature Code Optional Spec Code AP9235 □(□□)□
Temperature Range: -40°C to 85°C
Features
• Input voltage range: 2.8 to 30V
• Switch current limit 2A
• Drives LED strings up to 30V
• 1MHz fixed frequency minimizes the external components
• Dimming frequency for EN/PWM pin: 20kHz~1MHz
• Internal softstart limits the inrush current
• Open LED over voltage protection
• RoHS Compliant and Halogen Free
Applications
• GPS Navigation Systems
• Handheld Devices
• Portable Media Players
