HV-9120

HV9120 HV9123 High-Voltage Current-Mode PWM Controller Ordering Information +VIN Min Max 10V 450V 10V 450V www.DataSheet4U.com Feedback Accuracy <±2% <±2% Max Duty Cycle 49% 99% 16 Pin Plastic DIP HV9120P HV9123P Package Options 16 Pin 20 Pin SOIC Plastic PLCC HV9120NG HV9120PJ HV9123NG HV9123PJ DIE HV9120X HV9123X Standard temperature range for all parts is industrial (-40° to +85°C). Features ❏ ❏ ❏ ❏ ❏ 10 to 450V input acceptance range <1.3mA supply current >1.0MHz clock >20:1 dynamic range @ 500KHz Low internal noise General Description The Supertex HV9120 and HV9123 are Switch Mode Power Supply (SMPS) controller subsystems that can start and run directly from almost any DC input, from a 12V battery to a rectified and filtered 240V AC line. They contain all the elements required to build a single-switch converter except for the switch, magnetic assembly, output rectifier(s) and filter(s). A unique input circuit allows the 912x to self-start directly from a high voltage input, and subsequently take the power to operate from one of the outputs of the converter it is controlling, allowing very efficient operation while maintaining input-to-output galvanic isolation limited in voltage only by the insulation system of the associated magnetic assembly. A ±2% internal bandgap reference, internal operational amplifier, very high speed comparator, and output buffer allow production of rugged, high performance, high efficiency power supplies of 50 watts or more, which can still b...