Description
●The SG6846A is especially designed for SMPS with surge-current output, incorporated with a two-level OCP function. Besides the cycle-by-cycle current limiting, if the switching current is higher than two thirds the peak
●current threshold for 1700ms, over-current protection is activated such that the SG6846A is latched off.
●Features
●Low Startup Current: 8µA
●Low Operating Current: 3.7mA
●Peak-Current Mode of Operation with Cycle-by Cycle Current Limiting
●PWM Frequency Continuously Decreasing with Burst Mode at Light Loads
●VDDOver-Voltage Protection (OVP)
●AC Input Brownout Protection with Hysteresis
●Constant Output Power Limit (Full AC Input Range)
●Internal Latch Circuit for OVP, OTP, and OCP
●Two-level OCP Delay: 1600ms
●Output Short-Circuited Delay Time: 100ms
●Programmable PWM Frequency with Frequency Hopping
●OCP Threshold is Half Peak Current Limit
●Feedback Open-loop Protection with 1700ms Delay
●Built-in Soft-Start
●Applications
●General-purpose switch-mode power supplies and flyback power converters, including:
●Power Adapters
●Open-frame SMPS
●SMPS with Surge-current Output, such as for Printers, Scanners, Motor Drivers
