ALPHA-MICRO AMG

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 interface (I2C 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
DRV
VCC
AMG-PS131
DSP
PFC_PWM
VAC
VDC
PFCIOUT
DC
PFCIINN
SWDRV
SWIFB
Two-wire
Interface
SCL
SDA
EEPROM
SWVFB
15V
SWVCOMP
DRV
GND
Figure 1: Simplified example application circuit.
www.alpha-microelectronics.de
am.info@alpha-microelectronics.de
© 2010
AMG-PS131
FACT SHEET
Features
PFC
 Fully reconfigurable digitally controlled power factor controller in 0.25μm CMOS
technology
 On-chip AC phase-locked sinusoidal 45Hz to 65Hz oscillator for mains noise rejection
 High accuracy through on-chip 10-bit ADC and dedicated RISC processor
 Achievable high efficiency (>95%) and power factor (>0.99)
 Broad range of user selectable PWM frequency (15kHz to 200kHz)
 Low EMC filter requirements due to use of spread-spectrum PWM
 Two-wire interface to load software
 Supports 90V to 275V; 50/60Hz mains standards
 On-chip PLL with 1% RC reference oscillator to generate 64MHz clock signal
 On-chip over-current and short-circuit protection, brown-out control
 Ambient temperature range: -25°C to 85°C
 Package: TQFP64 10x10 (smaller packages in evaluation)
Switching-mode Power Supply
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Current-mode switching power supply controller in CMOS technology
Immediate response to low-frequency AC line swings
Output voltage and current levels determined by external components only
Energy saving cycle-skipping mode for operation with low levels of output power
On-chip reference voltage source
Available options
 On-chip gate drivers
 On-chip OTP or EEPROM memory for stand alone operation of PFC
 User interface for extended control function
Ordering Information
 AMG-PS131-ITQ64T
Development Tools
 Application notes: AMG-AN-PS131
 Evaluation board
 GUI for easy parameter change
www.alpha-microelectronics.de
am.info@alpha-microelectronics.de
© 2010