SG1825C中文资料Current Mode PWMs Isolated Switching Regulators - Current Mode PWM, 1.5Mhz数据手册Microchip规格书

描述 Description

The SG1825C is a high-performance pulse width modulator optimized for high frequency current-mode power supplies. Included in the controller are a precision voltage reference, micro power start-up circuitry, soft-start, high frequency oscillator, wideband error amplifier, fast current limit comparator, full double-pulse suppression logic, and dual totem pole output drivers. Innovative circuit design and an advanced linear Schottky process result in very short propagation delays through the current limit comparator, logic, and output drivers. This device can be used to implement either current mode or voltage mode switching power supplies. It also is useful as a series-resonant controller to frequencies beyond 1MHz. The SG1825C is specified for operation over the full military ambient temperature range of -55°C to 125°C.Microchip Ordering Part  Standard Microcircuit Drawing (SMD) SG1825CJ-DESCCross Reference 5962-8768101EASG1825CJ-DESCCross Reference 5962-8768101EX

特性 Features

Improved Reference Initial Tolerance (±1% max.)
Improved Oscillator Initial Accuracy (±3% typ.)
Improved Startup Current (500µA typ.)- Propagation Delay to Outputs (50ns typ.)
10V to 30V Operation
5.1V Reference Trimmed to ±1%
2MHz Oscillator Capability
1.5A Peak Totem-Pole Drivers
U.V. Lockout with Hysteresis
No Output Driver “FLOAT”
Programmable Softstart
Double-Pulse Suppression Logic
Wideband Low-Impedance Error Amplifier
Current-Mode or Voltage-Mode Control

简介

SG1825C属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的SG1825CDC-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。