LM25115,pdf datasheet (Seconda

The LM25115 controller contains all of the features necessary
to implement multiple output power converters utilizing
the Secondary Side Post Regulation (SSPR) technique. The
SSPR technique develops a highly efficient and well regulated
auxiliary output from the secondary side switching
waveform of an isolated power converter. Regulation of the
auxiliary output voltage is achieved by leading edge pulse
width modulation (PWM) of the main channel duty cycle.
Leading edge modulation is compatible with either current
mode or voltage mode control of the main output. The
LM25115 drives external high side and low side NMOS
power switches configured as a synchronous buck regulator.
A current sense amplifier provides overload protection and
operates over a wide common mode input range. Additional
features include a low dropout (LDO) bias regulator, error
amplifier, precision reference, adaptive dead time control of
the gate signals and thermal shutdown.