品牌索引
产品分类 > 小信号开关二极管> 瞬态电压抑制器TVS/ESD> 双极管二极管> 调谐二极管> 齐纳(稳压)二极管> 小信号肖特基二极管> 频带转换二极管> 中/高功率管> 射频PIN二极管> Sinterglass二极管> 整流器 > N沟道(N-Channel)> P沟道(P-Channel)> 双N沟道(Dual N-Channel)> 双P沟道(Dual P-Channel)> 双N和P沟道(Dual N and P-Channel)
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FAN7528The FAN7528 is an active power factor correction (PFC) controller for boost PFC applications which operates in the critical conduction mode (CRM). It uses the voltage mode PWM that compares an internal ramp signal with the error amplifier output to generate MOSFET turn-off signal. Because the voltage mode CRM PFC controller does not need the rectified AC line voltage information, it can save the power loss of the input voltage sensing network that is necessary for the current mode CRM PFC controller. The FAN7528 provides the dual output voltage control function without the AC line voltage sensing for adapter applications. It changes the PFC output voltage according to the AC line voltage. It provides many protection functions such as over voltage protection, open-feedback protection, over current protection and under voltage lock out protection. The FAN7528 can be disabled if the INV pin voltage is lower than 0.45V and then the operating current decreases to 65uA. Using a new variable on-time control method, THD is lower than the conventional CRM boost PFC ICs. |
