PWM Current-Mode Controller
NCP1216, NCP1216A
PWM Current-Mode
Controller for High-Power
Universal Off-Line Supplies
Housed in a SOIC−8 or PDIP−7 p...
Description
NCP1216, NCP1216A
PWM Current-Mode
Controller for High-Power
Universal Off-Line Supplies
Housed in a SOIC−8 or PDIP−7 package, the NCP1216 represents an enhanced version of NCP1200 based controllers. Due to its high drive capability, NCP1216 drives large gate−charge MOSFETs, which together with internal ramp compensation and built−in frequency jittering, ease the design of modern AC−DC adapters.
With an internal structure operating at different fixed frequencies, the controller supplies itself from the high−voltage rail, avoiding the need of an auxiliary winding. This feature naturally eases the designer task in some particular applications, e.g. battery chargers or TV sets. Current−mode control also provides an excellent input audio susceptibility and inherent pulse−by−pulse control. Internal ramp compensation easily prevents sub−harmonic oscillations from taking place in continuous conduction mode designs.
When the current setpoint falls below a given value, e.g....
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