CM6901_12 Datasheet, PDF (8/15 Pages) Champion Microelectronic Corp. – SLS (SRC/LLC+SR) Controller with 1 FM+2 PWMs

CM6901
SLS (SRC/LLC+SR) Controller with 1 FM+2 PWMs
Timing Diagram
Dead Time
PRIDRVB
PRIDRV
Rising Edge Delay Time
Falling Edge Delay Time
Oscillator
The oscillator frequency is determined by the values of RT and CT.
fosc = 1 / (tRAMP + t DEADTIME)
tRAMP = RT * CT * ln((VREF + ICHG*RT -1.25)/(VREF + ICHG*RT -3)) where ICHG = 4*(FEAO-VBE)/RSET
Resonant Section
FM Modulator
Frequency modulation of the resonant controller section is accomplished by controlling the charging current of the
oscillator through resonant error amplifier. The frequency of the resonant section is ½ of the oscillator frequency.
Compensation is accomplished by connecting R and C in series to the FEAO pin.
ICHG = 4*(FEAO-VBE)/RSET
ICHG(max) = 20V/RSET
2012/05/09 Rev2.0
Champion Microelectronic Corporation
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