DN05022/D,设计电路可以被认为具有两个独立的部分。有一个 LED 管理部分和一个
调光器管理/PWM 信号部分。 LED 管理部分对输出电容器充电,以使 LED 在直流状态下运行。调光器管理部分为调光器中的 TRIAC 提供
负载电流,并为串通 MOSFET 提供
栅极电压。该系列 MOSFET 的
栅极驱动器以峰值电流额定值对 LED 进行 PWM 控制。 NSIC2050B 恒流稳压器可调节流经 LED 的电流。 NSI50010Y限制调光器管理电路的功耗
说明
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DN05022/D, Design Circuit can be thought of as having two separate portions. There is an LED management portion and a dimmer management/PWM Signal portion. The LED management portion charges the output capacitor to run the LEDs in a DC state. The dimmer management portion provides loading current for the TRIAC in a dimmer and provides a gate voltage to the series-pass MOSFET. The gate drive of the series MOSFET PWMs the LEDs at their peak current rating. The NSIC2050B Constant Current Regulators regulate the current through the LEDs. The NSI50010Y limits the power consumption of the dimmer management circuit