APW7145 SOP8

توضیحات

The APW7120 is a fixed 300kHz frequency, voltage
mode, synchronousPWM controller. Thedevicedrives
two low cost N-channel MOSFETs and is designed to
work with single 5~12V or two supply voltage(s),
providing excellent regulation for load transients.
The APW7120 integrates controls, monitoring and
protection functions into a single 8-pin package to
provide a low cost and perfect power solution.
A power-on-reset (POR) circuit monitors the VCC
supply voltage to prevent wrong logic controls. An
internal 0.8V reference provides low output voltage
down to 0.8V for further applications.An built-in digital
soft-start with fixed soft-start interval prevents the
output voltage from overshoot as well as limiting the
input current. The controller’s over-current protection
monitors the output current by using the voltage drop
across the low-side MOSFET’s RDS(ON)
, eliminating the
need of a current sensing resistor. Additional under
voltage and over voltage protections monitor the
voltage on FB pin for short-circuit and over-voltage
protections. The over-current protection cycles the
soft-start function until 4 over-current events are
counted.
Pulling and holding the voltage on OCSET pin below
0.15V with an open drain device shuts down the
controller