EVAL-CN0196-EB1Z Analog Devices, EVAL-CN0196-EB1Z Datasheet

EVAL-CN0196-EB1Z

Manufacturer Part Number

EVAL-CN0196-EB1Z

Description

EVALBOARD/CN0196-EB1Z

Manufacturer

Analog Devices

Datasheet

1.EVAL-CN0196-EB1Z.pdf (6 pages)

Specifications of EVAL-CN0196-EB1Z

Pack_quantity

Comm_code

85437090

Lead_time

Eccn

EAR99

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EVALUATION AND DESIGN SUPPORT

Circuit Evaluation Boards

Design and Integration Files

CIRCUIT FUNCTION AND BENEFITS

The circuit, shown in Figure 1, is an H-bridge composed of high

power switching MOSFETs that are controlled by low voltage

logic signals. The circuit provides a convenient interface

between logic signals and the high power bridge. The bridge

uses low cost N-channel power MOSFETs for both the high and

low sides of the H-bridge. The circuit also provides galvanic

isolation between the control side and power side. This circuit

can be used in motor control, power conversion with embedded

control interface, lighting, audio amplifiers, and uninterruptable

power supplies (UPS).

Modern microprocessors and microconverters are generally low

power and operate on low supply voltages. Source and sink

current for 2.5 V CMOS logic outputs ranges from µA to mA .

Driving an H-bridge switching 12 V with a 4 A peak current

requires the use of carefully selected interface and level

translation components, especially if low jitter is needed.

The

independently selectable single-pole double-throw (SPDT)

switches. With a 5 V dc power supply, a voltage as low as 2 V

is a valid high input logic voltage. Therefore, the

provides appropriate level translation from the 2.5 V controlling

signal to the 5 V logic level needed to drive the

half-bridge driver.

Rev.0

Circuits from the Lab™ circuits from Analog Devices have been designed and built by Analog Devices

engineers. Standard engineering practices have been employed in the design and construction of

each circuit, and their function and performance have been tested and verified in a lab environment at

room temperature. However, you are solely responsible for testing the circuit and determining its

suitability and applicability for your use and application. Accordingly, in no event shall Analog Devices

be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause

whatsoever connected to the use of any Circuits from the Lab circuits. (Continued on last page)

CN-0196 Circuit Evaluation Board (EVAL-CN0196-EB1Z)

ADuC7061 MiniKit (EVAL-ADuC7061MKZ)

Schematics, Layout Files, Bill of Materials

ADG787

is a low voltage CMOS device that contains two

H-Bridge Driver Circuit Using Isolated Half-Bridge Drivers

Circuits from the Lab™ reference circuits are engineered and

tested for quick and easy system integration to help solve today’ s

analog, mixed-signal, and RF design challenges. For more

information and/or support, visit www.analog.com/CN0196.

ADuM7234

ADG787

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The

employs Analog Devices’ iCoupler® technology to provide

independent and isolated high-side and low-side outputs

making it possible to use N-channel MOSFETs exclusively in

the H-bridge. There are several benefits in using N-channel

MOSFETs: N-channel MOSFETs typically have one third of the

on resistance of P-channel MOSFETs and higher maximum

current; they switch faster, thereby reducing power dissipation;

and the rise time and fall time is symmetrical.

The 4 A peak drive current of the

power MOSFETs can switch on and off very fast, thereby

minimizing the power dissipation in the H-bridge stage. The

maximum drive current of the H-bridge in this circuit can be

up to 85 A, which is limited by the maximum allowable

MOSFET current.

The

microcontroller with integrated pulse width modulated (PWM)

controllers that have outputs that can be configured to drive an

H-bridge after suitable level translation and conditioning.

CIRCUIT DESCRIPTION

Level Translation of 2.5 V PWM Control Signal to 5 V

The

signals, while the minimum logic high input threshold for the

ADuM7234

incompatibility, the

level translator. The minimum input logic high control voltage

to the ADG787 is 2 V, which is compatible with the 2.5 V logic

from the ADuC7061. The output of the

between 0 V and 5 V, which is more than sufficient to drive the

ADuM7234

ADuC7061

EVAL-ADuC7061MKZ

Devices Connected/Referenced

ADuM7234

ADG787

ADuC7061

ADuM3100

ADP1720

ADCMP350

is 3.5V with a 5 V power supply. Because of this

is a low power, ARM7 based precision analog

is an isolated, half-bridge gate driver that

ADG787

Isolated Precision Half-Bridge 4 A Driver

2.5 Ω CMOS Low Power Dual 2:1 Switch

ARM7 Based Microcontroller with Dual

24-Bit Σ-Δ ADCs

Digital Isolator

50 mA Linear Regulator

Comparator with 0.6 V Reference

delivers 2.5 V logic level PWM

switch is used as an intermediate

ADuM7234

Circuit Note

ADG787

ensures that the

www.analog.com

switches

CN-0196

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