AP1688 LED Buck Controller

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            AP1688 LED Buck Controller
                    Universal input voltage, high power factor, and high-efficiency LED buck controller from Diodes Incorporated
    

Image of Diodes Incorporated's AP1688 Buck Controller The AP1688 from Diodes Incorporated is a high power factor, constant current buck controller for universal input voltage applications. The buck controller operates under boundary conduction mode (BCM) to achieve high efficiency, low electromagnetic interference (EMI), and low total harmonic distortion (THD).

An open loop algorithm is adopted in the AP1688, which will make the system achieve excellent line and load regulations with high PF for universal mains input.

The AP1688 features fast start-up, low start-up current, low operation current, and high efficiency. It also has comprehensive protection features including under-voltage lock out (UVLO), over-voltage protection (OVP), over-current protection (OCP), over- protection (OTP), and LED short and open protection.

The AP1688 is available in SO-8 package.

Features
Optimized for buck topology Boundary conduction mode (BCM) operation to achieve high efficiency High power factor > 0.9 High efficiency > 90% System current accuracy: ±5% Good line regulation and load regulation Low start-up current Tight CC regulation performance for universal input mains voltage range	Eliminates control loop compensation circuitry Easy EMI Open-load and reload detection Over-temperature protection Over-current protection Over-voltage and short and open circuit protection Lead-free and RoHS-compliant Halogen- and antimony-free, "Green" device

Applications

Universal mains LED lighting