Starter Kit Functionality And Features - Microchip Technology Digital Power Starter Kit User Manual

Digital Power Starter Kit User's Guide
1.3

STARTER KIT FUNCTIONALITY AND FEATURES

FIGURE 1-1:
USB
PC
DS52078A-page 16
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The Digital Power Starter Kit is a power supply board that consists of one independent
DC/DC synchronous Buck converter and one independent DC/DC Boost converter.
Figure 1-1 illustrates a high-level block diagram of the Starter Kit.
The Digital Power Starter Kit provides closed-loop Proportional-Integral-Derivative
(PID) control in the software to maintain the desired output voltage level. The dsPIC
DSC device provides the necessary memory and peripherals for A/D conversion, PWM
generation, analog comparison and general purpose I/O, preventing the need to
perform these functions in external circuitry.
SMPS dsPIC DSC devices are specifically designed to provide low-cost and efficient
control for a wide range of power supply topologies. The specialized peripherals facilitate
closed-loop feedback control of switch mode power supplies, providing communication
for remote monitoring and supervisory control.
The dsPIC33F SMPS family of devices provide the following features:
• Integrated program and data memory on a single chip
• Ultra-fast interrupt response time with interrupt priority logic
• Up to 2 Msps, on-chip ADC with Successive Approximation Register (SAR), and
three Sample-and-Hold (S&H) circuits.
• Three independent, high-resolution PWM generators, specially designed to support
different power topologies
• Two high-speed analog comparators for control loop implementation and system
protection
• On-chip system communications (I
• 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 features
DIGITAL POWER STARTER KIT SYSTEM DIAGRAM
V
IN
Vin_FB
AN4
V
DD
AN5
5k
5k
AN6
RB8
SW1
Temperature
AN7
Sensor
On-Board
Debugger
2
C™/SPI/UART)
V
IN
Current Sense
AN0
Buck
PWM1H
PWM1L
VFB Buck
AN1
V
IN
PWM4H
Current Sense
AN2
Boost
VFB Boost
AN3
LCD
Voltage/Current/
Temperature/Fault
®
Resistive
VFB Buck Load
PWM2H
Resistive
Load
VFB Boost
PWM2L
 2012 Microchip Technology Inc.