HV9123

HV9120/HV9123 High-Voltage, Current-Mode, PWM Controller Features 10 to 450V input voltage range <1.3 mA supply current >1 MHz clock 49% maximum duty version Applications Off-line high frequency power supplies Universal input power supplies High density power supplies Very high efficiency power supplies Extra wide load range power supplies Package Types 1 16 Description HV9120 and HV9123 are Switch-Mode Power Supply (SMPS) controllers suitable for the control of a variety of converter topologies, including flyback and forward converter. Using an internal, high-voltage regulator, HV9120 and HV9123 can derive a bias supply for starting-up and powering a converter from a variety of power sources, such as a 12V battery or the rectified AC (230 VAC) line. HV9120/HV9123 controllers include all essentials for a power-converter design, such as a bandgap reference, an error amplifier, a ramp generator, a high-speed PWM comparator, and a gate driver. A shu...