Texas Instruments (TI) has introduced a new current-sense amplifier for in-line motor
phase current measurement
that improves overall motor
efficiency compared to existing
current-sense amplifiers. The
INA240 offers enhanced pulse-width modulation (PWM)
rejection for systems running at
up to 80V to support a variety
of applications such as motor
control, solenoid control, and
power delivery systems.
Key features and benefits
• Enhanced PWM rejection
for improved motor efficiency:
The presence of high speed in-line PWM motor control
systems requires high AC and
DC accuracy. The INA240’s enhanced PWM rejection
improves transient suppression and gives designers the
ability to reduce their blanking time, optimize the motor
control algorithm, and ultimately improve motor efficiency.
• Flexible for a variety of motor applications: The
INA240 operates at PWM rates in excess of 100 kHz, with
switching-edge rates as high as 10 V/ns while enabling
system voltages as high as 80V.
In addition, to address the
needs for a wide range of
systems, this device supports
the negative voltages (-4V)
induced by the inductive
kickback of the motor.
performance and accuracy: The
INA240 has one of the
industry’s best combinations of
low offset voltage ( 5 µV), offset
drift ( 50 nV/°C), gain error, and
drift performance (0.05 percent
and 0.5 ppm/°C, respectively).
The device also provides an
excellent AC common-mode
rejection ratio (CMRR) of 93 dB
at 50 kHz. The INA240 delivers
performance over a wide range
of operating conditions.
• Enhanced performance
for any motor control solution:
The INA240’s precision is
showcased in a 48V 10A in-line three-phase high frequency
Gallium Nitride (GaN) inverter for brushless motor reference
design. This BoosterPack™plug-in module reference design
is paired with a C2000™LaunchPad™kit, demonstrating
how designers can use the INA240 and LMG5200 GaN half-bridge power stage to reduce switching losses over an
extended temperature range up to 125°C, facilitate the use
14 SERVO 02.2017
Energy Propel Systems Combo
Hitec’s Energy Propel motors are now available in convenient combination packs. With built-in
programmable speed controls and high performance
efficient motors, the Energy Propel line delivers the
functionality and space-saving design multi-rotor projects
require. Each bundle pack comes with two clockwise and
two counter-clockwise motors to fully equip a rotorcraft and
get it airborne quickly. Pricing begins at $121.88 and the
combos are available in six sizes.
Motor features include:
• Motor and ESC combination provides a lightweight
and space-saving alternative to separate components.
• High performance, efficient motor.
• Programmable speed control.
• Updatable firmware.
• BLHeli featuring active braking/damping light.
• ONE SHOT synchronization protocol for faster
communication between the flight control and ESC.
• Simple wiring eliminates failure points.
• Backed by Hitec’s one year warranty.
For further information, please contact:
www.hitecrcd.com Hitec RCD