Freescale Semiconductor kinetis TWR-SMPS-LVFB User manual

TWR-SMPS-LVFB
Quick Start Guide
Low-Voltage, Full-Bridge
Power Conversion Module
Tower System
Development Board
for Switch Mode
Power Supply

2
Auxiliary
Power Supply
Circuit
J1: Input from
AC-DC Adapter
J5: Input from DC
Power Source
MOSFET
H-Bridge
J4: Output Load
Connector
Dynamic
Load Circuit
Primary
Elevator
LEDs
Figure 1: Front side of TWR-SMPS-LVFB
Secondary
Elevator
TWR-SMPS-LVFB Tower System Module
Freescale Tower System
The TWR-SMPS-LVFB module is part of the Freescale Tower System,
a modular development platform that enables rapid prototyping and
tool re-use through reconfigurable hardware. Take your design to the
next level and begin constructing your Tower System platform today.
Quick Start Guide
Get to Know the TWR-SMPS-LVFB

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Introduction to TWR-SMPS-LVFB
Tower System Module
The TWR-SMPS-LVFB Tower System Module is a development kit that can be used
in conjunction with the Tower System development platform, providing ready-made
software and hardware development for a low-voltage, full-bridge DC-DC switch mode
power supply and using various control algorithms.
TWR-SMPS-LVFB Tower System Module Features
• Power topology full-bridge DC-DC converter with synchronous rectification
• Input and output voltage sensing with under and over voltage protection
• Transformer primary current sensing with over load and short circuit protection
• Primary current sensing for average and peak current control implementation
• Full-bridge MOSFET driver to driver primary full bridge MOSFETs
• Half-bridge MOSFET driver for synchronous MOSFET driving
• Dynamic/transient load circuit to test digital control loop performance on transient load
• Power supply input voltage input of 20-30V DC, output voltage 5V and load up to 8A
• Input power supply reverse polarity protection circuitry
This kit includes:
• TWR-SMPS-LVFB (Peripheral Module)
• Load Circuit for System Simulation
• Power supply
Required Modules with TWR-SMPS-LVFB
• Tower System Elevator Module, TWR-ELEV
• Tower System compatible controller module (for example, the TWR-KV46F150M)

Quick Start Guide
Step-by-Step Hardware Installation Instructions
1Attach Load
Resistor Setup
Attach the load resistor setup to output
connector J4 (output load connector) on
the TWR-SMPS-LVFB:
• Connect RED wire at pin 3 of J4
• Connect GREEN wire at pin 2 of J4
• Connect BLACK wire at pin 1 of J4
2Assemble Your
Tower System
• Locate the Elevator modules identifiable
by the four card edge connectors on
each.
• The controller module will be connected
to slot 4 and the TWR-SMPS-LVFB will
be connected to slot 1 of the elevator
card. The slot number is labeled on the
elevator cards. Identify these now.
• Each Elevator modules has one primary
and secondary card. The primary is
denoted by white card edge connectors
and the secondary is denoted by black
card edge connector.
• Identify now the primary and secondary
card edges for TWR-SMPS-LVFB
and compatible controller module.
Plug the “Primary” card edge of each
module into “Primary” Elevator and the
“Secondary” Elevator module onto
the “Secondary” card edges.
• Please refer to Freescale Tower system
Factsheet (TWRFS) for more information.
4
3
2
1
2.5 OHM
1.2 OHM
J4
Load resistor set-up
+5V
Load resistor set-up
CAUTION
Hot! Do not touch the load resistor when it is powered on.

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Step-by-Step Hardware Installation Instructions
3Connect DC
Power Supply
Connect the DC power supply provided in
the kit to connector J1. If using an external
power supply then the input voltage range
on J5 should be 20 to 30V DC and the
current should be limited to less than
3A. Do not touch the load resistor when
the DC power supply is connected. The
temperature at the load resistor is very high.
4Turn ON DC
Power Supply
Turn ON the DC power supply. When
power is applied, the D12 power-on LED
will illuminate. The TWR-SMPS-LVFB board
powers the Tower System with 5V and
3.3V on-board power supplies.
5Running
A Demo
Please refer to freescale.com/
TWR-SMPS-LVFB to understand what
MCU controller cards are supported, and
to download a Quick Start Guide to learn
more about running the low-voltage
SMPS demo.

Quick Start Guide
TWR-SMPS-LVFB Tower System Module Demo
The TWR-SMPS-LVFB Tower System demonstration implements average current mode
control of full bridge converter and is implemented on the TWR-KV46F150M controller
card. Other cards are also supported. Refer to freescale.com/TWR-SMPS-LVFB for
the full list of supported controller cards. For more details, refer to the TWR-KV46F150M
Quick Start Guide for TWR-SMPS-LVFB on freescale.com/TWR-KV46F150M.
TWR-SMPS-LVFB Demo Software Features
• Constant 5V output with load changes from zero Amps to 8Amps
• Constant 5V output with input voltage from 20V to 30V
• Average current mode control with voltage feed forward
• Output overshoot and undershoot <5% of output voltage with load changes
from 25% to 75% of load
• Demo and application mode of demo code
• Dynamic load control
• Over voltage, under voltage and over current fault protection
• FreeMASTER integration for output voltage and current waveform observation, demo
software running status information
• User interface control loop co-efficient parameters
WARNING
Changing of control loop to be out of range may cause output to be unstable and may destroy
the board. Be aware:
• Do not change voltage loop control coefficients Kp, Ki and Kpi more than +/-10% of the
set default value.

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Support
Visit freescale.com/support for a list of phone
numbers within your region.
Warranty
Visit freescale.com/warranty for complete
warranty information.
Get Started
Download installation software and documentation under
“Jump Start Your Design” at freescale.com/TWR-SMPS-LVFB.
For more information, visit freescale.com/
TWR-SMPS-LVFB, freescale.com/Kinetis or
freescale.com/Tower
For more information, visit freescale.com
Freescale, the Freescale logo and Kinetis are trademarks of Freescale
Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. Tower is a trademark of
Freescale Semiconductor, Inc. ARM and Cortex are registered trademarks of
ARM Limited (or its subsidiaries) in the EU and/or elsewhere. All rights reserved.
All other product or service names are the property of their respective owners.
© 2015 Freescale Semiconductor, Inc.
Doc Number: TWRSMPSLVFBQSG REV 0 Agile Number: 926-28534 REV A