AMG-PS131
FACT SHEET
DSP-based PFC for Power Factors close to unity and
an auxiliary low voltage DC power supply
The AMG-PS131 is a universal DSP-based PFC solution with switching-mode power supply,
to be used in applications requiring power factor values close to unity and a highly efficient DC
power supply. Typical application areas for the AMG-PS131 are high power motors and
lighting systems. The power factor controller (PFC) is based on boost topology and is fully
software controlled. The PFC algorithm is loaded into the DSP from an on-chip, non-volatile
memory after Reset. The parameters of the algorithm can be changed using a two-wire inter-
face (I
2
C compatible). The IC contains an auxiliary switching-mode power supply in flyback
topology with current feedback. It is designed to supply external circuitry with a highly stable
low voltage.
Highlights
Independent DSP based PFC regulation engine
PFC values >0.99
Secondary SMPS controller for auxiliary low voltage generation
Example Application Circuit
AC
VDC
15V
5V
VCC
DRV
AMG-PS131
DSP
VAC
PFCIOUT
PFCIINN
PFC_PWM
VDC
DC
SWDRV
SWIFB
Two-wire
Interface
SCL
SDA
GND
EEPROM
SWVFB
SWVCOMP
15V
DRV
Figure 1: Simplified example application circuit.
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ALPHA-MICRO [ ALPHA MICROELECTRONICS GMBH ]
