21ics Diodes Incorporated has introduced a current-mode pulse-width modulation (PWM) controller, the AP3127/H, optimized for consumer portable products such as smartphone chargers and notebook power adapters, providing a high performance A low cost solution. Other applications in the consumer electronics and communications markets include: set-top boxes, game consoles, modems, and networking equipment.
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Under normal operation, the PWM switching frequencies of the AP3127 and AP3127H controllers are internally fixed to 65 kHz and 100 kHz, respectively. However, under moderate load conditions, the device will enter a power-saving mode and reduce the switching frequency with frequency foldback to increase system efficiency. However, the lowest switching frequency is still maintained at 20kHz to ensure that any audible noise is removed. In the case of no load or light load, these integrated circuits minimize standby power through the burst mode, and its built-in frequency jitter function reduces the emission of electromagnetic interference.
In addition to providing superior power control with higher average efficiency, the AP3127/H includes a comprehensive range of protection features to ensure stable, robust and reliable operation compared to competing products with the same pin. This covers a variety of overload and error conditions, such as overcurrent, secondary side overvoltage (SOVP), internal over temperature (OTP), and secondary side undervoltage protection (SUVP) that protects the supply when a short circuit occurs on the output cable. .
The AP3127/H pulse width modulation controller is available in a standard SOT26 package and shipped in quantities of one thousand.
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