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2016 Microchip Technology Inc. DS20005519A-page 1
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
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 shutdown latch
provides on/off control. Device power consumption is
less than 6 mW when shutdown.
HV9120 offers 50% maximum duty and HV9123 offers
nearly 100% duty.
Package Types
See Table 3-1 for pin information
16-lead SOIC
16-lead PDIP
1
16
4
1
16
HV9120/HV9123
High-Voltage, Current-Mode, PWM Controller
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