Datasheet
Buck/Boost Converter PICtail™ Plus Daughter Board User’s Guide
DS70336A-page 8 © 2008 Microchip Technology Inc.
The dsPIC33F SMPS family of devices provides the following features:
• Integrated program and data memory on a single chip
• Ultra-fast interrupt response time and hardware interrupt priority logic
• Up to 4 Msps, on-chip ADC with two SARs, and up to four dedicated and two
shared sample/hold circuits for multiple loop control
• Four independent, high-resolution PWM generators specially designed to support
different power topologies
• Four analog comparators for control loop implementation and system protection
• On-chip system communications (I
2
C™/SPI/UART)
• On-chip Fast RC oscillator for lower system cost
• High-current sink/source for PWM pins: 16 mA/16 mA
• CPU performance: 40 MIPS
• Extensive power saving
• CodeGuard™ Security enabled
FIGURE 1-1: DAUGHTER BOARD BLOCK DIAGRAM
AN4
AN0
AN1
AN2
AN3
INPUT CONNECTOR J2
V
IN
V
IN
AN4
AN0
AN1
AN2
AN3
AN8
AN9
INPUT CONNECTOR J1
V
INSENSE
I1
V1
PWM1H
I2
V2
PWM2H
PWM2L
Load
PWM1L
I3
V3
PWM3H
V
IN
V1
PWM1L
V
OUT
1
PWM1H
LOAD
I1
LOAD
GND
V
OUT
2
V
IN
V2
PWM2L
I2
V
IN
V
OUT
3
PWM3H
I3
V3
PWM2H