Analog Devices EVAL-LTC7066-AZ Manual de usuario

Evaluation Board User Guide

EVAL-LTC7066-AZ

150V Half-Bridge Driver with Floating Grounds and Adjustable Dead-Time

Rev 0

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TECHNICAL SUPPORT

One Analog Way, Wilmington, MA 0 1887- 2356, U.S.A.

Tel: 781.329.4700

General Description

The EVAL-LTC7066-AZ evaluation circuit is a half-bridge

driver that drives two N-channel MOSFETs. The two 5V

logic-compatible PWM inputs independently drive each of

the two N-channel gate outputs to each MOSFET. The

eval kit has several unpopulated PCB pads to help

facilitate the user in customizing the board for their

application.

The LTC7066 driver has a powerful 0.8Ωpull-down and

1.5Ωpull-up MOSFET drivers driving two 150V N-channel

MOSFETs. The gate drivers on the LTC7066 are capable

of driving MOSFETs with different ground references;

however, this eval kit has these ground references

committed.

Design files for this circuit board are available.

Performance Summary (TA= 25°C)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Logic Input Supply (VIN-LOGIC)

Power Input Supply (VIN-POWER)

150

Maximum Output Current

PWM Control Frequency

2,000+

kHz

Maximum PWM Control Voltage

5.5

Quick Start Procedure

The EVAL-LTC7063-AZ can be evaluated without connecting any additional components or a load. However, the user

may find adding two load resistors, as shown in Figure 1, provides a better means for evaluating. Alternatively, the user

can configure their own application circuit. Test with a resistor divider as a load:

1. Connect two 100Ωpower resistors to the SW node, as shown in Figure 1.

2. Apply VIN-POWER supply.

3. Apply VIN-LOGIC supply.

4. Apply two 5V, 1kHz square-wave signals 180° apart with a 48% duty cycle, as shown below. Limiting the duty

cycle to 48% and staggering them 180° apart will ensure no shoot-through.

Evaluation Board User Guide

LTC7066-AZ

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Rev 0

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5. Monitor the BG, TG, and SW pins with a scope.

6. See Figure 2 for expected results with:

a. VIN-POWER = 40V

b. VIN-LOGIC = 10V

Figure 1. EVAL-LTC7066-AZ Test Setup

Figure 2. Test Results

Evaluation Board User Guide

LTC7066-AZ

analog.com

Rev 0

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Schematic

Revision History

REVISION

NUMBER

REVISION

DATE

DESCRIPTION

PAGES

CHANGED

6/23

Initial release

—

Evaluation Board User Guide

LTC7066-AZ

ASSUMED BY ANALOG DEVICES FOR ITS USE, NOR FOR ANY INFRINGEMENTS OF PATENTS OR OTHER RIGHTS OF THIRD PARTIES THAT

MAY RESULT FROM ITS USE. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. NO LICENCE, EITHER EXPRESSED OR

IMPLIED, IS GRANTED UNDER ANY ADI PATENT RIGHT, COPYRIGHT, MASK WORK RIGHT, OR ANY OTHER ADI INTELLECTUAL PROPERTY

RIGHT RELATING TO ANY COMBINATION, MACHINE, OR PROCESS WHICH ADI PRODUCTS ALL INFORMATION CONTAINED HEREIN IS

PROVIDED “AS IS” WITHOUT REPRESENTATION OR WARRANTY. NO RESPONSIBILITY IS OR SERVICES ARE USED. TRADEMARKS AND

REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS.

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