该UC1825 系列的PWM控制ICs是高fre-优化频率开关模式电源应用.特殊护理给予了尽量减少比较器传输延迟并同时最大限度地提高带宽和压摆率逻辑电路误差放大器.该控制器是专为使用或电流租金模式或电压模式为系统的输入电压能力保护电路包括一个带有1V电流限制比较器门槛，TTL兼容关闭端口和软启动引脚这将增加一倍为最大占空比钳位.这种逻辑是完全锁存提供抖动的自由经营，禁止在多个脉冲输出.根据电压分离断面滞后800mV保证低启动电流.在欠压分离中，输出puts高阻抗.这些器件具有图腾柱设计源输出和沉容性负载，如门，高峰值电流功率MOSFET.关于国家的目的是作为一个高的水平.
UC2825NG4 Printed Circuit Board Layout Considerations
High speed circuits demand careful attention to layout and component placement. To assure proper perfor-mance of the UC1825 follow these rules: 1) Use a ground plane. 2) Damp or clamp parasitic inductive kick energy from the gate of driven MOSFETs. Do not allow the out-put pins to ring below ground. A series gate resistor or ashunt 1 Amp Schottky diode at the output pin will serve this purpose. 3) Bypass VCC, VC, and VREF. Use 0.1µF monolithic ceramic capacitors with low equivalent series inductance. Allow less than 1 cm of total lead length for each capacitor between the bypassed pin and the ground plane. 4) Treat the timing capacitor, CT, like a bypass ca-pacitor.
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