UC2824中文资料具有 9.2V/8.4V UVLO 和 80% 占空比、温度范围为 -40°C 至 85°C 的增强型 30V、1.5A 双端 1MHz PWM 控制器数据手册TI规格书

描述 Description

The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward.Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

特性 Features

• Complementary Outputs
• Practical Operation Switching Frequencies to 1 MHz
• 50-ns Propagation Delay to Output
• High Current Dual Totem Pole Outputs (1.5 A Peak)
• Wide Bandwidth Error Amplifier
• Fully Latched Logic With Double Pulse Suppression
• Pulse-by-Pulse Current Limiting
• Soft Start/Maximum Duty Cycle Control
• Under-Voltage Lockout with Hysteresis
• Low Start Up Current (1.1 mA)
• Trimmed Bandgap Reference (5.1 V ± 1%)

简介

UC2824属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由TI制造生产的UC2824DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。