Kinetic Technologies KTS1898A EVAL Kit Instruction Manual

: May 15, 2024
: Kinetic Technologies

EVAL Kit Manual

KTS1898A

6ARMS VBUS ISINK Load Switch for 28V EPR Systems

Brief Description

The KTS1898A Evaluation (EVAL) Kit is used to demonstrate and evaluate the KTS1898A functionality, performance, and PCB layout. The kit includes a fully assembled and tested PCB with the KTS1898A IC installed, two pairs of high- current XT30-to-Banana power cables, and a printed copy of the Quick Start Guide (also contained within this document). The KTS1898A has EN active-low input logic with internal 1MΩ pull-down.

Ordering Information

Part Number

|

Description

| IC Package
---|---|---
KTS1898AEOAE-MMEV01|

KTS1898A EVAL Kit

|

WLCSP-25

3D CAD Image

Kinetic Technologies KTS1898A EVAL Kit - a1

EVAL Kit Physical Contents

Item #

| Description|

Quantity

---|---|---

1

| KTS1898A EVAL fully assembled PCB|

1

2

| XT30-to-Banana power cables, red/black pair|

2 pairs

3

| Anti-static bag|

1

4

| Quick Start Guide, printed 1 page (A4 or US Letter)|

1

5

| EVAL Kit box|

1

QR Links for Documents

IC Landing Page

| EVAL Kit Landing Page
---|---

https://www.kinet-ic.com/KTS1898/

|

https://www.kinet-ic.com/KTS1898aeoae-mmev01

User-Supplied Equipment

Required Equipment

Bench Power Supply for VIN – V/9V/12V/15V/20V/28V/32V and 0.5A/1.5A/3A/5A/6A, as needed for the intended application. For testing over-voltage protection and withstand voltage, a 35V adjustable bench power supply is preferred.
Digital Multimeter – one or more, used to measure input/output voltages and currents.

Optional Equipment

Bench Power Supply for VIO – 1.5V to 5V, low current. Needed for shutdown mode (EN = H) and fault monitoring (ACOK pull-up voltage).
Oscilloscope – for dynamic testing of voltages (and currents with a current probe, if available).
Load – either an eLoad, power resistors, or an actual system load.
Additional Digital Multimeters

Recommended Operating Conditions

Symbol

| Description|

Value

|

Units

---|---|---|---

VIN

| Absolute Input Withstand Voltage
Input Operating Voltage|

-0.3 to 35
3 to 32

|

V
V

VIO

| VIO Operating Voltage|

1.5 to 5.5

|

V

IOUT

| Output Load Current|

0 to 6

|

A

Jumper Descriptions

Designator

|

Name

| Description|

Default

---|---|---|---

P1

|

EN

| Active-Low Enable Input
H: Shutdown Mode – switch disabled (A-Version)
L: Enable Mode – normal switch operation (A-Version)|

L

Quick Start Procedures

Set Jumpers to default: EN = L
Connect one pair of XT30-to-Banana power cables to the XT30 connector at VIN and GND (right edge of EVAL Kit).
Before connecting the EVAL Kit to the VIN bench supply, turn on the supply and adjust the voltage as close to 0V as possible. Then turn off the supply. While off, connect the banana ends of the XT30-toBanana power cables to the VIN bench supply.
Turn on the VIN bench supply and very slowly ramp its voltage to an appropriate voltage, such as 5, 9, 12, 15, 20, 28 or 32V. While ramping VIN slowly, use the bench supply’s output current indication (or a digital multimeter) to monitor the VIN current. If the current becomes high, reduce the VIN voltage quickly to prevent damage. Then inspect the setup for any wiring errors.
With valid VIN voltage, use a digital multimeter to check the output voltage between the KVOUT and GND terminals on the EVAL Kit. It should be nearly the same as the input voltage.
Use a digital multimeter to check the “ideal diode” droop regulation voltage between the KVIN and KVOUT terminals on the EVAL Kit. At no-load conditions, it should be close to 15mV. At light-load conditions (<1A), it should be in the range of 10mV to 30mV.
Use a digital multimeter to check the no-load supply current at VIN. Consult the KTS1898A datasheet for the expected current range at the VIN voltage condition in use. For conditions of VIN = 5.0V, EN = L, and no-load, it should be close to 218µA.

Typical Test Setup Diagram

As an example, use the following test setup to measure items 6 and 7 in the Quick Start Procedures.

Kinetic Technologies KTS1898A EVAL Kit - a2

Electrical Schematic

Kinetic Technologies KTS1898A EVAL Kit - a3

Bill of Materials (BOM)

Item #

| Quantity| Designator| Description| Value| Package| Manufacturer| Manufacturer Part Number| Digikey Part Number| Mouser Part Number
---|---|---|---|---|---|---|---|---|---
1| 1| C1| CAP CER 10uF 50V X5R 0805| 10uF| 0805| Samsung| CL21A106KBYQNNE| 1276-CL21A106KBYQNNETR-ND|

187-CL21A106KBYQNNE

2

| 1| C2| CAP CER 10uF 50V X5R 0805| NC| 0805| Samsung| CL21A106KBYQNNE| 1276 -CL21A106KBYQNNETR-ND| 187-CL21A106KBYQNNE
3| 2| C3, C4| CAP CER 10uF 35V X5R 0805| 10uF| 0805| Murata| GRM21BR6YA106KE43L| 490-10514-1-ND|

81-GRM21BR6YA106KE3L

4

| 2| C5, C6| CAP CER 10uF 35V X5R 1206| NC| 1206| | | |
5| 2| CN1, CN2| 30A Right Angle Through Hole Power Connectors| | | AMASS|

XT30PW-M

| |

6

8

| 1| R1| RES SMD 47K 1% 1/10W 0603| 47K| 0603| Yageo| RC0603FR-0747KL| 311-47 .0KHRCT-ND| 603-RC0603FR-0747KL
9| 1| R2| RES SMD 0603| NL|

0603

| | | |

10

| 1| R3| RES SMD 1K 1% 1/10W 0603| 1K| 0603| Yageo| RC0603FR-071KL| 311-1 .00KHRCT-ND| 603-RC0603FR-071KL
11| 4| TP1, TP2, TP3, TP4| TERM TURRET SINGLE L=5.56MM TIN| | TH| Keystone| 1502-2| 36-1502-2-ND|

534-1502-2

12

| 3| TP5, TP6, TP9| PC TEST POINT MULTIPURPOSE RED| | TH| Keystone| 5010| 36-5010-ND| 534-5010
13| 1| TP7| PC TEST POINT MULTIPURPOSE YELLOW| | TH| Keystone| 5014| 36-5014-ND|

534-5014

14

| 1| TP8| PC TEST POINT MULTI PURP ORANGE| | TH| Keystone Electronics| 5013| 36-5013-ND| 534-5013
15| 3| TP10, TP11, TP12| PC TEST POINT MULTIPURPOSE BLACK| | TH| Keystone| 5011| 36-5011-ND|

534-5011

16

KTS1898AEOAE-TA

| |

Printed Circuit Board (PCB)

Additional Test Procedures

Logic Pins Testing:
a. Before connecting the EVAL Kit to the VIO bench supply, turn on the supply and adjust the voltage as close to 0V as possible. Then turn off the supply. While off, connect the VIO bench supply to VIO and GND terminals on the EVAL Kit (with user-supplied banana-to-clip leads).
b. Turn on the VIO bench supply and very slowly ramp its voltage to an appropriate voltage, such as 1.8, 3.3, or 5V. While ramping VIO slowly, use the bench supply’s output current indication (or a digital multimeter) to monitor the VIO current. If the current becomes high, reduce the VIO voltage quickly to prevent damage. Then inspect the setup for any wiring errors.
c. With valid VIO and VIN voltages, check the EN and ACOK functionality. Check the shutdown supply current at VIN with EN = H. With EN = L, check the ACOK flag pulls high to VIO when VIN < 2.5V and when VIN > 33V.
Testing with Load:
a. Use the second XT30-to-Banana power cable pair to apply loads from VOUT to GND.
b. Under heavy-load conditions, use caution. The KTS1898A IC may become hot; avoid skin contact. The voltage between the KVIN and KVOUT terminals at 5A load condition should be close to 150mV due to on-resistance of the switch.
c. Use multimeters and an oscilloscope to make DC and transient measurements as desired.

Setting OVLO

By default, the EVAL Kit uses the internal 33V setting for the Over-Voltage Protection (OVP) threshold. The OVLO pin and associated resistive voltage divider (R2, R3) are used to externally set the over-voltage threshold in the range of 4V to 33V. As shipped, R2 is not populated and R3 is populated with a 1kΩ pull-down so that OVLO is 0V and the KTS1898A uses the internal 33V setting.

To set a different OVP threshold using the OVLO pin, populate R2. See the KTS1898A datasheet to calculate the necessary value of resistance.

Adding Additional Input Capacitance

The CIN input capacitance of the EVAL Kit is 10uF by design. 10uF is the maximum allowed by USB standards on the VBUS pin of the USB connector. However, for non-standard applications, the C2 footprint (not populated) is available to add additional input capacitance.

Evaluating Other ICs

This EVAL Kit may optionally be used to evaluate the similar KTS1898B VBUS current-sink protection load switch. Before ordering samples of this device, please confirm capability to reflow and exchange WLCSP devices.

Troubleshooting

Symptom	Root Cause	Solution
ACOK does not go high during faults.	VIO supply is off or not connected.

Connect and enable a VIO pull-up supply. ACOK has an Absolute Maximum Rating of 6V.
EN = H does not disable the switch.| VIO supply is off or not connected.| Connect and enable a VIO pull-up supply.
Optionally, remove the jumper on P1 and connect EN (at pin 2 of P1) to VIN with a clip-to-clip lead.
EN has an Absolute Maximum Rating of 35V.

Important Notices

Legal notice

Kinetic Technologies assumes no responsibility or liability for information contained in this document. Kinetic Technologies reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or services without notice. The information contained herein is believed to be accurate and reliable at the time of printing.

Reference design policy

This document is provided as a design reference and Kinetic Technologies assumes no responsibility or liability for the information contained in this document. Kinetic Technologies reserves the right to make corrections, modifications, enhancements, improvements, and other changes to this reference design documentation without notice.

Reference designs are created using Kinetic Technologies’ published specifications as well as the published specifications of other device manufacturers. This information may not be current at the time the reference design is built. Kinetic Technologies and/or its licensors do not warrant the accuracy or completeness of the specifications or any information contained therein.

Kinetic Technologies does not warrant that the designs are production worthy. Customer should completely validate and test the design implementation to confirm the system functionality for the end use application.

Kinetic Technologies provides its customers with limited product warranties, according to the standard Kinetic Technologies terms and conditions.

For the most current product information visit us at www.kinet- ic.com

Life support policy

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SUBSTANCE COMPLIANCE

Kinetic Technologies IC products are compliant with RoHS, formally known as Directive 2002/95/EC of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment. However, this evaluation kit does not fall within the scope of the EU directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and may not meet the requirements of these or related directives. To the best of our knowledge the information is true and correct as of the date of the original publication of the information. Kinetic Technologies bears no responsibility to update such statement.

Feb 2024 – Revision 01a Kinetic Technologies Confidential