MAX14870EVKIT [MAXIM]

Operates from a Wide 4.5V to 36V Supply;


型号：	MAX14870EVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Operates from a Wide 4.5V to 36V Supply
文件：	总7页 (文件大小：414K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

General Description

Quick Start

The MAX14870 evaluation kit (EV kit) is a fully assembled

and tested circuit board that evaluates the MAX14870 full-

bridge DC motor driver.

Recommended Equipment

● MAX14870 EV kit

● 100kHz function generator

● 24V, 2A power supply

● 3.3V, 100mA power supply

● DC brushed motor

The EV kit can also be used to evaluate the MAX14872.

Features

● Operates from a Wide 4.5V to 36V Supply

● Standalone or Software-Controlled Operation

● Proven PCB Layout

Procedure

The EV kit is fully assembled and tested. Follow the steps

below to verify board operation before exercising the full

features of the device:

● Fully Assembled and Tested

● PMOD Compatible Connector

1) Verify that all the jumpers are in their default posi-

tions, as shown in Table 1.

2) Connect the 24V supply to the VDD test point (TP8)

and the ground test point (TP5) on the EV kit.

3) Connect one wire of the the motor to the J3 terminal

block (M1).

Ordering Information appears at end of data sheet.

4) Connect the other wire of the motor to the J3 terminal

block (M2).

5) Connect the oscilloscope to the M1 test point (TP11),

the M2 test point (TP12), and the PWM test point

(TP3).

6) Connect DIR (TP2) to ground.

7) Turn on the 24V power supply.

8) Using the function generator, connect a 0V to 3V,

10kHz switching signal to the PWM test point (TP3).

9) Monitor M1, M2, and PWM.

10)Change the duty cycle on the PWM input to increase/

decrease the speed of the motor.

19-7698; Rev 2; 10/19

Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

High-Voltage Transient Protection

Detailed Description of Hardware

The EV kit includes pads for two diodes, D1 and D2.

These diodes are not required during normal operation,

but can be added for protection against high-voltage tran-

sients during short-circuit events.

The MAX14870 EV kit is a fully tested circuit board dem-

onstrating the capabilities of the MAX14870 motor driver.

Current Regulation

A 100mΩ resistor is connected between COM and ground

for current regulation. To disable current regulation, place

a shunt on the J1 jumper and connect J4 to 2‒3 to con-

nect COM and SNS, respectively, to ground.

Fault Indicator LED

The FAULT output is connected to the 3.3V logic supply

through R4. A fault is generated when an overcurrent

condition occurs on M1 and/or M2. LED1 turns on during

a fault condition.

Current Sensing

Connect the J4 jumper to 1‒2 to monitor the motor current

during operation when J1 is open.

NOTE: To ensure that LED1 turns on during a short-circuit

event, use a power supply capable of supply at least 6A

when testing short-circuit functionality.

Table 1. Jumper Descriptions

JUMPER

SHUNT POSITON

DESCRIPTION

Open*

Closed

1-2*

COM is connected to ground through a 100mΩ resistor.

COM is connected to ground.

SNS is connected to COM.

2-3

SNS is connected to ground. Current regulation is disabled.

*Default position.

Ordering Information

PART

TYPE

MAX14870EVKIT#

EV Kit

#Denotes RoHS compliant.

Maxim Integrated

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

MAX14870 EV Kit Bill of Materials

ITEM REF_DES

DNI/DNP QTY MFG PART #

GRM21BR71H105KA12

MANUFACTURER

VALUE

DESCRIPTION

;

CL21B105KBFNNN;

C2012X7R1H105K085A

MURATA;

SAMSUNG

UMK212B7105KG;

CGA4J3X7R1H105K125 ELECTRONICS;

CAPACITOR; SMT (0805); CERAMIC CHIP; 1UF; 50V; TOL=10%; TG=-55 DEGC TO +125

1 C1, C2

2 J1

2 AB

TDK;TAIY

1UF

DEGC; TC=X7R

CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH; 2PINS; -65

DEGC TO +125 DEGC

CONNECTOR; MALE; THROUGH HOLE; 0.025 INCH SQUARE POST HEADER; RIGHT

ANGLE; 6PINS

1 PCC02SAAN

SULLINS

PCC02SAAN

TSW-106-08-S-S-RA

3 J2

1 TSW-106-08-S-S-RA

SAMTEC

PHOENIX

1935161 CONTACT

4 J3

1935161 CONNECTOR; FEMALE; THROUGH HOLE; GREEN TERMINAL BLOCK; STRAIGHT; 2PINS

CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT THROUGH; 3PINS; -65

PCC03SAAN DEGC TO +125 DEGC

5 J4

6 LED1

1 PCC03SAAN

1 597-3111-407F

SULLINS

DIALIGHT

597-3111-407F

DIODE; LED; SMT LED; RED; SMT (1206); PIV=4V; IF=0.03A

MACHINE FABRICATED; ROUND-THRU HOLE SPACER; NO THREAD; M3.5; 5/8IN;

7 MH1-MH4

8 R1

9 R2

9032 KEYSTONE

9032 NYLON

1 CRCW0402270RFK

1 CRA2512-FZ-R100ELF BOURNS

VISHAY DALE

270 RESISTOR; 0402; 270 OHM; 1%; 100PPM; 0.0625W; THICK FILM

0.1 RESISTOR; 2512; 0.1 OHM; 1%; 75PPM; 3W; METAL FILM

CRCW040210K0FK;

1 RC0402FR-0710KL

CRCW06031K00FK;

2 ERJ-3EKF1001

VISHAY DALE;

10 R3

YAGEO PHICOMP

VISHAY DALE;

PANASONIC

10K

RESISTOR; 0402; 10K; 1%; 100PPM; 0.0625W; THICK FILM

11 R5, R6

RESISTOR; 0603; 1K; 1%; 100PPM; 0.10W; THICK FILM

TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN;

YELLOW; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH;

TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; RED;

PHOSPHOR BRONZE WIRE SIL;

IC; DRV; FULL-BRIDGE DC MOTOR DRIVER; TDFN12-EP 3X3

PCB:MAX14870

DIODE; RECT; SMA (DO-214AC); PIV=50V; IF=2A

12 TP1-TP6, TP9-TP12

5014 KEYSTONE

N/A

13 TP8

14 U1

15 PCB

16 D1, D2

5010 KEYSTONE

MAXIM

N/A

1 MAX14870ETC+

1 MAX14870

0 MURA205T3G

MAX14870ETC+

PCB

MURA205T3G

MAXIM

ON SEMICONDUCTOR

DNP

TOTAL

Maxim Integrated

│ 3

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

MAX14870 EV Kit Schematic

M U R A 2 0 5 T 3 G

D 2

D N I

M U R A 2 0 5 T 3 G

D 1

D N I

1 3

V D D

1 0

Maxim Integrated

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

MAX14870 EV Kit PCB Layout Diagrams

MAX14870 EV Kit PCB Layout—Top Silkscreen

MAX14870 EV Kit PCB Layout—Top Layer

MAX14870 EV Kit PCB Layout—Layer 2

Maxim Integrated

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

MAX14870 EV Kit PCB Layout Diagrams (continued)

MAX14870 EV Kit PCB Layout—Layer 3

MAX14870 EV Kit PCB Layout—Bottom Layer

MAX14870 EV Kit PCB Layout—Bottom Silkscreen

Maxim Integrated

│ 6

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Evaluates: MAX14870, MAX14872

MAX14870 Evaluation Kit

Revision History

REVISION REVISION

PAGES

CHANGED

DESCRIPTION

NUMBER

DATE

6/15

9/19

Initial release

—

Updated all sections

1‒7

Updated the Quick Start section and added the Current Regulation, Current Sensing,

and High-Voltage Transient Protection sections

10/19

1‒2

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses

are implied. Maxim Integrated reserves the right to change the circuitry and speciﬁcations without notice at any time.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

2019 Maxim Integrated Products, Inc.

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