AMG-XB404 Datasheet, PDF (27/73 Pages) alpha microelectronics gmbh – Fully Integrated Single Motor Controller for Electrical Motors

AMG-XB404
Fully Integrated Single Motor Controller for Electrical Motors
5.5. Power Factor Correction Controller (PFC)
The AMG-XB404 PFC's features:
 Fully configurable digitally controlled PFC
 Constant frequency, continuous conduction mode (CCM)
 16 bit RISC core
 256 words x 22 bits program memory
 64 words x 16 bits data memory
 Adjustable PWM-Frequency, Range: 5kHz ~ 150kHz, Spread spectrum option
 On-chip over-current and short-circuit protection, brown-out control
 On-chip AC-phase-locked sinusoidal oscillator (45Hz ~ 65Hz) for improved AC line noise
reduction
Rect.
AC
HV
L1
R1
R2
V
Aux
DRV
D1
R6
C1
R7
HVDC
8 bit
on-chip bus
PFC
Contr.
ADC
AGND
PFC_PWM
Measuring
VAC
Amplifier
VDC
PFCIFB
R3
PFCI
R4
R5
Figure 15: Simplified PFC controller application schematic
The AMG-XB404's PFC controller supports standard boost-topology power factor correction
depicted in figure 15. It is designed to achieve IEC61000-3-2 level PFC performance when
combined with appropriately dimensioned power electronics and line filtering. The PFC controller
interacts directly with the ADC unit to acquire the rectified AC voltage, the DC bus voltage, and the
rectified AC current value. It generates a pulse width modulated logic-level switching signal
connected to an external gate driver circuit. A detailed block schematic of the PFC controller is
shown in figure 16 p. 28.
The PFC controller is built around an autonomous 16 bit RISC processor core supporting
15 different instructions (see table 12 p. 29). It runs at the same high clock frequency as the
DMCE. A 22 bits wide, 256 words deep SRAM serves as the processor's program memory. All
instructions operate on a 6 bit data address space which is divided into address ranges for general
purpose registers, constants, hardware ports, and values stored in a dedicated SRAM (see
table 13 p. 31).
AMG-XB404
Revision: A
2. Nov. 2012 © All rights reserved
Page 27 of 73