SG2074 Datasheet, PDF (1/4 Pages) Freescale Semiconductor, Inc – Digital Switched-Mode Power Supply (SMPS)

Building Control
Digital Switched-Mode Power
Supply (SMPS)
Overview
The main purpose of a power supply is to
provide clean and stable power to a load,
regardless of power grid conditions. The
SMPS has been widely used in office
equipment, computers, communication
systems and other applications because of
its high efficiency and high energy density.
EXAMPLE DIGITAL SMPS
L1
D1
T1
T2
C1
L2
V+
D2
C2
D3
AC110V
or
AC220V
Q1
T4
Shunt
Vsynch
GND1
If
Vf
AN0 PWM AN1 AN2
Current
Regulator
Voltage
Regulator _Vref
56F801
SCI
T3
GND2
C3 GND2
D4
D5 _L3
V-
If
Vf
PWM1 AN0 AN1
Current
Regulator
Voltage ^Vref
Regulator
SCI
56F8323
SCI
Key Benefits
> Power applications become
more flexible and universal
> High input power factor
lowers power pollution to the
power grid
> Intelligent mode management
and fault supervision
> Operating status can be
monitored and controlled in
real time
> Lower system and
maintenance cost