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AP9235
General Debion 
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 Inbation 
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 bs 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 
Typical Applications
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