711 SMD711_BDD002).pdfVIP

High Voltage Switching SMD711 Regulator - Controller SMD711 FEATURES DESCRIPTION Operate from a rectified 85~265 VAC line The SMD711 is a monolithic high voltage switching source. regulator-controllers with PWM/PFM control that is Oscillation frequency: 80 kHz to 100 kHz. specifically designed to operate from a rectified Output voltage external setting (FB) type 85~265 VAC line source. available. FB terminal voltage (VFB) 1.0 V. This device contain a reference voltage source, Built-in Start-UP current source. oscillation circuit, error amplifier, phase Duty ratio: 0% to 5% typ.- PFM control, 5% to compensation circuit, PWM control circuit, power 82% typ. - PWM control supply 450 V MOS-transistor, and other Built-in current limiting circuit: Assigned by components. Since the oscillation frequency is a external resistor. high 90 kHz, with the addition of a small external Soft-start function: Built-in Soft-start circuit. component, the IC can function as switching regulator with high efficiency. The SMD711 provides low-ripple power, high-efficiency, and excellent transient characteristics thanks to a PWM control circuit capable of varying the duty ratio linearly from 0% to