描述 Description

The SG1524B is a pulse width modulator for switching power supplies that features improved performance over industry standards like the SG1524. A direct pin-for-pin replacement for the earlier device, it combines advanced processing techniques and circuit design to provide improved reference accuracy, and extended common mode range at the error amplifier and current limit inputs. A DC-coupled flip-flop eliminates triggering and glitch problems, and a PWM data latch prevents edge oscillations. The circuit incorporates true digital shutdown for high speed response, while an under voltage lockout circuit prevents spurious outputs when the supply voltage is too low for stable operation. Full double-pulse suppression logic insures alternating output pulses when the Shutdown pin is used for pulse-by-pulse current limiting. The SG1524B is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2524B is characterized for the industrial range of -25°C to 85°C, and the SG3524B is designed for the commercial range of 0°C to 70°C.

特性 Features

? 7V to 40V Operation
? 5V Reference Trimmed to 1%
? 100Hz to 400kHz Oscillator Range
? Excellent External Sync Capability
? Dual 100 mA Output Transistors
? Wide Current Limit Common Mode Range DC-Coupled Toggle Flip-flop
? PWM Data Latch -Undervoltage Lockout
? Full Double-pulse Suppression Logic
? Full Double-pulse Suppression Logic
? 60V Output Collectors

簡介

SG3524B屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由制造生產的SG3524BDC-DC 開關控制器PMIC（電源管理集成電路）DC 到 DC 開關式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓撲結構可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。