SG5842JA Datasheet | System General

Highly Integrated Green-Mode PWM Controller Features - Green-Mode PWM Controller - Low Start-up Current (14µA) - Low Operating Current (4m A) - Programmable PWM Frequency with Hopping (5842JA) - Peak-Current-Mode Control - Cycle-by-Cycle Current Limiting - Synchronized Slope pensation - Leading-Edge Blanking - Constant Output Power Limit - Totem Pole Output with Soft Driving - VDD Over-Voltage Protection (OVP) - Programmable Over-Temperature Protection (OTP) .Data Sheet- 4U.c Inotemrnal Latch Circuit (OTP, OVP) - Internal Open-Loop Protection - VDD Under-Voltage Lockout (UVLO) - GATE Output Maximum Voltage Clamp (18V) APPLICATIONS General-purpose switch mode power supplies and flyback power converters, including: - Notebook Power Adapters - Open-Frame SMPS DESCRIPTION The highly integrated SG5842A/JA series of PWM controllers provides several Features to enhance the performance of flyback converters. Product Specification SG5842A/JA To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency at light-load conditions. To avoid acoustic-noise problem, the minimum PWM frequency set above 22KHz. This green-mode function enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5842A/JA is manufactured using the Bi CMOS process. This allows a low start-up current, around 14µA, and an operating current of only 4m A. As a result, a large start-up resistance can be used. The SG5842A/JA built-in synchronized slope pensation achieves stable peak-current-mode control. SG5842JA integrates a frequency hopping function that helps reduce EMI emission of a power supply with minimum line...