ANALOG DEVICES ADPL13602EVKIT Evaluation Kit User Guide

ANALOG DEVICES ADPL13602EVKIT Evaluation Kit

Product Information

Specifications

• Product Name: ADPL13602EVKIT# Evaluation Kit
• Evaluated Component: ADPL13602 high-efficiency, synchronous step-down DC-DC converter
• Output Voltage: 5V/2.4A
• Input Supply Range: 6.5V to 36V
• Switching Frequency: 500kHz
• Features: Adjustable input undervoltage lockout, adjustable soft-start, open-drain RESET signal

FAQ

• Q: What is the default setting for the EN/UVLO Jumper (JU1)?
  • A: The default position is not installed, which means it is in SHUNT POSITION 1-2.

General Description

The ADPL13602EVKIT# evaluation kit (EV kit) provides a proven design to evaluate the ADPL13602 high-efficiency, synchronous step-down DC-DC converter. The EV kit provides 5V/2.4A at the output from a 6.5V to 36V input supply. The switching frequency of the EV kit is preset to 500kHz for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, and open-drain RESET signal.

The EV kit also provides a good layout example, which is optimized for thermal performance. For more details about the IC benefits and features, refer to the ADPL13602 data sheet.

Features And Benefits

• Operates from a 6.5V to 36V Input Supply
• 5V Output Voltage
• Delivers Up to 2.4A Output Current
• 500kHz Switching Frequency
• Enable/Undervoltage Lockout Input,Resistor–Programmable UVLO Threshold
• Adjustable Soft-Start Time
• Open-Drain RESET Output
• Overcurrent and Overtemperature Protection
• Proven Printed Circuit Board (PCB) Layout
• Fully Assembled and Tested

Ordering Information appears at end of data sheet.

EV Kit Photo

Quick Start

Required Equipment

• ADPL13602EVKIT#
• 6.5V to 36V, 2.5A DC-input power supply
• Load capable of sinking 2.4A
• One digital voltmeter (DVM)

Equipment Setup and Test Procedure

The EV kit is fully assembled and tested. Follow the steps below to verify the board operation.

Caution: Do not turn on power supply until all connections are completed.

1. Set the power supply at a voltage between 6.5V and 36V. Then, disable the power supply.
2. Connect the positive terminal of the power supply to the VIN PCB pad and the negative terminal to the nearest PGNDPCB pad. Connect the positive terminal of the 2.4A load to the VOUT PCB pad and the negative terminal to the nearestPGND PCB pad.
3. Connect the DVM across the VOUT PCB pad and the nearest PGND PCB pad.
4. Verify that the shunt is installed across pins 1-2 on jumper JU1 (see Table 1 for more details).
5. Select the shunt position on JU2 according to the intended mode of operation (see Table 2 for details)
6. Turn on the DC power supply.
7. Enable the load.
8. Verify that the DVM displays 5V.
9. Verify that the DVM displays 1.8V across RESET and SGND PCB pads.

Detailed Description

The ADPL13602EVKIT# EV kit is designed to deliver load current up to 2.4A at 5V output voltage from a 6.5V to 36V input supply. The switching frequency of the EV kit is configured at 500kHz by leaving the RT resistor open.

The EV kit includes an EN/UVLO PCB pad and jumper JU1 to enable the output at a desired minimum input voltage. Jumper JU2 allows the selection of the mode of operation based on light load performance requirements. An additional RESET PCB pad is available to monitor whether the converter output is in regulation.

Soft-Start Input (SS)

The EV kit offers an adjustable soft-start function to limit inrush current during the startup. The soft-start time is adjusted by the value of C3, the external capacitor connected between SS and SGND. The selected output capacitance (CSEL) and the output voltage (VOUT) determine the minimum value of C3, as shown by the following equation:

The soft-start time (tSS) is related to the soft-start capacitor C3 by the following equation:

For example, to program a 0.82ms soft-start time, C3 should be 6800pF.

Enable/Undervoltage-Lockout (EN/UVLO) Programming

The ADPL13602 offers an enable and an adjustable input undervoltage lockout feature. In this EV kit, leave the EN/UVLO jumper (JU1) open for normal operation. When JU1 is left open, the ADPL13602 is enabled when the input voltage rises above 6.3V. To disable ADPL13602, install a jumper across pins 2-3 on JU1. See Table 1 for JU1 settings. The EN/UVLO PCB pad on the EV kit supports external enable/disable control of the device. Leave jumper JU1 open when external enable/disable control is desired. A potential divider formed by R1 and R2 sets the input voltage (VINU) above which the converter is enabled when JU1 is left open.

Choose R1 to be 3.32MΩ max, then calculate R2 as follows:

where, VINU is the voltage at which the device is required to turn on.
R1 and R2 are in kΩ,
Refer to the ADPL13602 data sheet for more details on setting the input under- voltage lockout level.

Table 1. Converter EN/UVLO Jumper (JU1) Settings

Not installed*

| Connected to the center node of resistor-divider R1 and R2| Enabled, UVLO level is set by the resistor-divider between VIN and SGND
2-3| Connected to SGND| Disabled

*Default position.

Mode Selection (MODE)

The ADPL13602EVKIT# EV kit provides a jumper (JU2) that allows the ADPL13602B to operate in Pulse-Width Modulation (PWM) and Discontinuous conduction mode (DCM) modes. The EV kit also provides a MODE PCB pad to monitor the MODE pin voltage of the converter in the desired mode of operation. Refer to the ADPL13602 data sheet for more details on the modes of operation. Table 2 shows the mode selection (JU2) settings that can be used to configure the desired mode of operation.

Table 2. Mode Selection (JU2) Settings

*Default position.

Active-Low, Open-Drain Reset Output (RESET)

The ADPL13602EVKIT# EV kit provides a RESET PCB pad to monitor the status of the converter. RESET goes high when VOUT rises above 95% (typ) of its nominal regulated voltage. RESET goes low when VOUT falls below 92% (typ) of its nominal regulated voltage.

Hot Plug-In and Long Input Cables

The ADPL13602EVKIT# PCB layout provides an optional electrolytic capacitor (C6 = 47μF/50V). This capacitor limits the peak voltage at the input of the ADPL13602 when the DC input source is “hot-plugged” to the EV kit input terminals with long input cables. The equivalent series resistance (ESR) of the electrolytic capacitor dampens the oscillations caused by the interaction of the inductance of the long input cables and the ceramic capacitors at the buck converter input.

ADPL13602EVKIT# EV Kit Performance Report

(VIN = 24V, VOUT = 5V, IOUT = 2.4A, fSW = 500kHz, TA = +25ºC, unless otherwise noted.)

(VIN = 24V, VOUT = 5V, IOUT = 2.4A, fSW = 500kHz, TA = +25ºC, unless otherwise noted.)

Component Suppliers

Note

• Indicate that you are using the ADPL13602 when contacting these component suppliers.

Ordering Information

Bill of Materials

ADPL13602EVKIT# Bill of Materials

SL. NO| DESIGNATOR| DESCRIPTION| QUANTITY| MANUFACTURER PART NUMBER
---|---|---|---|---
1| C1| 4.7µF, 10%, 50V, X7R, Ceramic capacitor (1206)| 1| MURATA GRM31CR71H475KA12
2| C2| 2.2µF, 10%, 10V, X7R, Ceramic capacitor (0603)| 1| MURATA GRM188R71A225KE15
3| C3| 6800pF, 10%, 50V, X7R, Ceramic capacitor (0402)| 1| MURATA GCM155R71H682KA55
4| C4| 22µF, 20%, 16V, X7R, Ceramic capacitor (1210)| 1| TDK C3225X7R1C226M250AC
5| C5, C10, C17| 0.1µF, 10%, 16V, X7R, Ceramic capacitor (0402)| 3| TAIYO YUDEN EMK105B7104KV

6

| ****

C6

| ALUMINUM-ELECTROLYTIC; 47UF; 50V; TOL=20%; MODEL=EEV SERIES| ****

1

| ****

PANASONIC EEE-TG1H470UP

7| C9| 0.1µF, 10%, 50V, X7R, Ceramic capacitor (0402)| 1| TDK C1005X7R1H104K050BE
8| C11, C15| 150pF, 5%, 100V, COG, Ceramic capacitor (0402)| 2| TDK C1005C0G2A151J050BA
9| L1| INDUCTOR, 15µH, 3.4A (5mm x 5mm)| 1| COILCRAFT XGL5050-153ME
10| R1| RES+, 3.32MΩ, 1% (0402)| 1| VISHAY DALE CRCW04023M32FK
11| R2| RES+, 825KΩ, 1% (0402)| 1| VISHAY DALE CRCW0402825KFK
12| R3| RES+, 200KΩ, 1% (0402)| 1| VISHAY DALE CRCW0402200KFK
13| R4| RES+, 27.4KΩ, 1% (0402)| 1| VISHAY DALE CRCW040227K4FK
14| R6| RES+, 10KΩ, 1% (0402)| 1| BOURNS CR0402-FX-1002GLF
15| R7| RES+, 4.7Ω, 1% (0402)| 1| VISHAY DALE CRCW04024R70FK

16

| ****

U1

| HIGH-EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER WITH INTERNAL COMPENSATION (TQFN16-EP 3mm x 3mm)| ****

1

| ****

ADPL13602BATE+

17| JU1-JU2| 3-pin header (36-pin header 0.1” centers )| 2| Sullins: PEC03SAAN
18| –| Shunts| 2| SULLINS STC02SYAN

19

| ****

MH1-MH4

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

4

| ****

KEYSTONE 9032

20| C13, C14| OPEN: Capacitor (1206)| 0| —
21| L2| OPEN: INDUCTOR| 0| —
22| FB1| OPEN: Ferrite Bead (0805)| 0| —

23

| C7, C8, C12, C16| ****

OPEN: Capacitor (0402)

| ****

0

| ****

—

24| R5| OPEN: Resistor (0402)| 0| —

DEFAULT JUMPER TABLE

Schematic

ADPL13602EVKIT# Schematic

PCB Layout Diagram

ADPL13602EVKIT# PCB Layout Diagram

Revision History

REVISION NUMBER| REVISION DATE| DESCRIPTION| PAGES CHANGED
---|---|---|---
0| 12/23| Initial release| —

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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References

• Mixed-signal and digital signal processing ICs | Analog Devices
• Panasonic Australia | Air Con | Cameras | Home Appliances
• SullinsCorp | SullinsCorp Connector Solutions – Custom Connectors
• Vishay Intertechnology: Passives & Discrete Semiconductors
• Document Feedback Form | Analog Devices
• Mixed-signal and digital signal processing ICs | Analog Devices

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