NEW PRODUCT
Description
A Product Line of Diodes Incorporated
AP3125B
GREEN MODE PWM CONTROLLER
Pin Assignments
The A...
NEW PRODUCT
Description
A Product Line of Diodes Incorporated
AP3125B
GREEN MODE PWM CONTROLLER
Pin Assignments
The AP3125B is a current mode PWM controller which is optimized for high performance, low standby power and cost effective offline flyback converters.
The PWM switching frequency at normal operation is internally fixed (about 65kHz). In middle load, the IC will enter green mode to improve system efficiency with the help of frequency foldback. A minimum switching frequency (about 20kHz) is set to avoid the audible noise. In no load or light load, the IC will enter the burst mode to minimize standby power. Furthermore, the frequency dithering function is built-in to reduce EMI emission.
Internal slope compensation allows more stable Peak-Current Mode control over wide range of input
voltage and load conditions. Internal line compensation ensures constant output power limit over entire universal line
voltage range.
Comprehensive protection features are included, such as cycle-bycycle current limit (OCP), VCC Over
Voltage Protection (VOVP), internal OTP, Over Load Protection (OLP) and pins’ fault protection. Built-in Brownout (BNO) and Line Over
Voltage Protection (LOVP) are also integrated in AP3125B.
(Top View) Pin 1 Mark
GND 1 FB 2 BNO 3
6 GATE 5 VCC 4 SENSE
SOT26
Features
Very Low Start-up Current Current Mode Control Non-audible-noise Green-mode Control Internal Slope Compensation Soft Start During Startup Process Frequency Fold Back for High Av...