NXP Semiconductors
KTFRDM34933EVBUG
FRDM-34933EVB evaluation board
KTFRDM34933EVBUG
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© NXP B.V. 2017. All rights reserved.
User guide
Rev. 1.0 — 15 March 2017
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3.4 System requirements
The kit requires the following:
•
USB-enabled PC with Windows
®
XP or higher
4 Getting to know the hardware
4.1 Board overview
The evaluation board features the dual H-bridge ICs, which features the ability to drive
either a single two phase stepper motor or two brushed DC motors. The dual H-bridge
ICs incorporate internal control logic, a charge pump, gate drive, high current, and low
R
DS(on)
MOSFET output circuitry.
4.2 Board features
The evaluation board is designed to easily evaluate and test the main component, the H-
bridge devices. The board's main features are as follows:
•
Compatible with Freedom series evaluation boards such as FRDM-KL25Z
•
Built in fuse for both part and load protection
•
Screw terminals to provide easy connection of power and loads
•
Test points to allow probing of signals
•
Built-in voltage regulator to supply logic level circuitry
•
LED to indicate status of logic power supply of the evaluation board, as well as a
general purpose indicator
4.3 Device features
The evaluation board feature the following NXP product:
Table 1. Device features
Evaluation board
Device
Device features
FRDM-34933EVB
MC34933 (16-pin QFN)
The NXP MC34933 is a four channel dual H-bridge
IC that is ideal for portable electronic applications
to control single stepper motor or two Brush DC
motors.
•
2.0 V to 7.0 V dual H-bridge motor driver with
enable and tristate bridge control via a parallel
MCU interface. Output current 1.0 A continuous,
1.4 A peak.
•
The IC has low RDS on-resistance of 1.0 Ohm
(max.) and the drivers can be PWM-ed up to 200
kHz control frequency.
•
Contains an integrated charge pump and level
shifter (for gate drive voltages), in addition to
integrated shoot through current protection
and under voltage circuit detector to avoid
malfunction
•
Four output control modes: forward, reverse,
brake, tristate (open)
