CM6901 Datasheet, PDF (1/15 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
GENERAL DESCRIPTION
FEATURES
CM6901 is a SLS, SRC/LLC + SR resonant controller ‹ 90+ Controller
and it can operate at both SRC and LLC region with ‹ Smaller and Thinner Transformer
synchronous rectification to achieve high efficiency. Its ‹ 20ms with reasonable Bulk Cap(hold up time)
unique features: FM + 2 PWMING modes. It is used for ‹ SLS, SRC/LLC + SR resonant controller
DC-DC conversion in offline application.
‹ Supply Voltage Range : 10V to 20V.
Light load regulation is accomplished by transitioning ‹ 2 Gate Drivers: Typical Peak Drive from 12V
the controller from frequency modulation mode into
supply : (PMOS~200 ohm and NMOS~100 ohm).
PWM mode. To have the optimal balance performance ‹ UVLO =11V with 1V Hystetesis.
between hold-up time and efficiency, its frequency range ‹ Reference OK Comparator.
crosses fr1(resonant frequency).
‹ FM + 2 PWMING Mode Operation
‹ Light Load PWMING (light load regulation)
CM6901 system has a constant voltage feedback loop ‹ SR Ideal Diode PWMING(cross resonant frequency
with precision 2.5V VFB reference. The 1V ILIMIT can
application )
be latched when a standby converter is applied; ‹ GM FEAO, FM modulation Error Amplifier
otherwise, it is an auto-restart I limit.
‹ GM DEAO, PWM Error Amplifier
‹ Close Loop Soft start Capability with Shutdown
Function.
‹ Auto-Restart during Current Limit .
‹ Precision 2.5V VFB threshold for constant voltage
feedback loop.
‹ Precision 1V I limit threshold.
APPLICATIONS
‹ DC-DC power supply.
‹ Operates in FM/PWM mode.
CM6901 Pin Configuration
2009/11/02 Rev1.4
Champion Microelectronic Corporation
Page 1