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High-Efficiency
H-Bridge Reference Design |
NVE's unique isolator/FET drivers
and isolated DC-to-DC convertors enable high-speed, high-efficiency H-bridges.
A new reference design is shown below. Four inputs from a microcontroller or power-management
IC control the left and right, high-side and low-side FETs in the H-bridge.
Our unique passive-input isolators allow a variety of inputs and do not require
an input-side power supply. |
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Ultrahigh CMTI Isolator/Drivers for the High Side
NVE "CMTI-grade" isolator/FET drivers have the highest CMTI in the industry.
That allows efficient, high-speed switching. These devices are ideal for driving
high-side FETs in high-performance H-bridges and other energy conversion applications.
The high CMTI grade is 100% tested to ensure each part delivers a minimum of 200 kilovolt/microsecond
Common-Mode Transient Immunity (CMTI). Simple external deglitch circuitry can
extend the CMTI to an extraordinary 350 kilovolt/microsecond (typical).
Failsafe-LOW Isolator/Drivers for the Low Side
A dual-channel failsafe-LOW isolator ensures no shoot-through in FET driver applications.
These parts also have an extended supply range of up to 6.6 volts to directly
drive a variety of power FETs or gate driver ICs.
Ultraminiature MSOP
Parts are available in 3 mm by 3 mm MSOP-8 packages, which are the world’s
smallest isolators.
Unique Technology
The devices are manufactured with NVE’s award-winning IsoLoop® spintronic
GMR technology for compact size, high speed, and excellent noise immunity. A unique
ceramic/polymer composite barrier provides rugged isolation and virtually unlimited
barrier life.
This is the reference design bill of materials:
Part Number
|
Description
|
Notes |
| IL610CMTI-1E |
Ultrahigh
CMTI
Isolator/FET driver, Failsafe HIGH, MSOP |
>200
kV/µs CMTI; 100 Mbps;
Extended 3 – 6.6 V supply
(for high-side drivers) |
| IL611F-1E |
2-channel
Isolator/FET driver, Failsafe LOW, MSOP
|
Extended
supply range
(two channels for low-side drivers) |
| ILDC13V-15E |
3.3–6V
Isolated
DC-DC Convertors
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3
x 5.5 mm DFN--the world’s smallest
DC-to-DC convertors
(for high-side gate supplies) |
Arduino Shield Demo Board
An available Arduino Shield H-bridge demonstration
board is rated at 40 V and 50 A to control up to 2 kW loads
with a simple three-wire Arduino interface (PWM, Dir, and Enable). The board has
everything you need--just add an Arduino and a power supply. You can download
an Arduino demonstration program from our GitHub
Repository.
Demonstration
We demonstrate two H-bridge Shields controlling an e-bike motor and electric brake:
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