|
LM5022_09 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – 60V Low Side Controller for Boost and SEPIC | |||
|
LM5022
October 7, 2009
60V Low Side Controller for Boost and SEPIC
General Description
The LM5022 is a high voltage low-side N-channel MOSFET
controller ideal for use in boost and SEPIC regulators. It con-
tains all of the features needed to implement single ended
primary topologies. Output voltage regulation is based on
current-mode control, which eases the design of loop com-
pensation while providing inherent input voltage feed-forward.
The LM5022 includes a start-up regulator that operates over
a wide input range of 6V to 60V. The PWM controller is de-
signed for high speed capability including an oscillator fre-
quency range up to 2 MHz and total propagation delays less
than 100 ns. Additional features include an error amplifier,
precision reference, line under-voltage lockout, cycle-by-cy-
cle current limit, slope compensation, soft-start, external syn-
chronization capability and thermal shutdown. The LM5022 is
available in the MSOP-10 package.
Features
â Internal 60V Startup Regulator
â 1A Peak MOSFET Gate Driver
â VIN Range 6V to 60V
â Duty Cycle Limit of 90%
â Programmable UVLO with Hysteresis
â Cycle-by-Cycle Current Limit
â External Synchronizable (AC-coupled)
â Single Resistor Oscillator Frequency Set
â Slope Compensation
â Adjustable Soft-start
â MSOP-10 Package
Applications
â Boost Converter
â SEPIC Converter
Typical Application
© 2009 National Semiconductor Corporation 202122
20212201
www.national.com
|
▷ |