Kinetic technologies KTD2690 Single Flash LED Driver User Manual
- June 12, 2024
- Kinetic Technologies
Table of Contents
- Kinetic technologies KTD2690 Single Flash LED Driver
- Product Information
- Product Usage Instructions
- Brief Description
- Ordering Information
- 3D CAD Image
- User-Supplied Equipment
- Jumper Descriptions
- Quick-Start Procedures
- Graphical User Interface
- Electrical Schematic
- Printed Circuit Board (PCB)
- Additional Test Procedures
- Troubleshooting
- Important Notices
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Kinetic technologies KTD2690 Single Flash LED Driver
Product Information
Product Name | KTD2690 EVAL Kit |
---|---|
Part Number | KTD2690EVAB-MMEV01 |
IC Package | UDFN22-10 |
Description | KTD2690 is a single flash LED driver with a programmable 1.5A |
current source. The EVAL Kit is used to demonstrate and evaluate
the functionality, performance, and PCB layout of the KTD2690 in
UDFN package.
Product Usage Instructions
- Ensure that the following user-supplied equipment is available:
- – VIN, VOUT, LED LX power supply with a voltage range of 2.7V to 5.5V
- Optional equipment:
- – Graphical User Interface (GUI) software
- Recommended operating conditions:
- – VIN, VOUT, LED LX voltage: 2.7V to 5.5V
- Jumper Descriptions:
Designator | Name | Description | Default |
---|---|---|---|
P1 | VIN_I2C | Jumper to connect the LED (D1). To use the on-board LED (D1), |
the jumper is present. To use an external LED, the jumper is
removed.| Open
P3| STROBE| Jumper to short the 0.1 sense resistor (R3). When the jumper is
not present, measuring the voltage across P5 testpoints allows
calculating the LED current ILED = VP5 / 0.1.| LED open
Follow the Quick-Start Procedures in the user manual for more detailed instructions on using the EVAL Kit and the Graphical User Interface (GUI) software.
Graphical User Interface (GUI) Window
To Check the I2C Connection to the Device:
- Open the GUI software.
- Follow the instructions in the user manual for checking the I2C connection to the KTD2690 device.
To Turn on Flash Mode by I2C Command for 1000ms Duration at 375mA Flash Current:
- Open the GUI software.
- Follow the instructions in the user manual for turning on the flash mode using the I2C command.
Note: Refer to the Electrical Schematic and Bill of Materials(BOM) in the user manual for additional technical information about the EVAL Kit.
Brief Description
The KTD2690 Evaluation (EVAL) Kit is used to demonstrate and evaluate the KTD2690 in UDFN package functionality, performance, and PCB layout. The kit includes a fully assembled and tested PCB with the KTD2690 IC installed, and a printed copy of the Quick-Start Guide (also contained within this document).
Ordering Information
Part Number | Description | IC Package |
---|---|---|
KTD2690EVAB-MMEV01 | KTD2690 EVAL Kit | UDFN22-10 |
3D CAD Image
EVAL Kit Physical Contents
Item # | Description | Quantity |
---|---|---|
1 | KTD2690 EVAL Kit fully assembled PCB | 1 |
2 | MCP2221A Board – General Purpose USB to GPIO I2C – Stemma QT / Qwiic | 1 |
3 | Stemma QT / Qwiic JST SH 4-pin Cable – 100mm Long | 1 |
4 | Anti-static bag | 1 |
5 | KTD2690 EVAL Kit Quick-Start Guide — printed 1-page (A4 or US Letter) | 1 |
6 | EVAL Kit box | 1 |
QR Links for Documents
User-Supplied Equipment
Required Equipment
- Bench Power Supply for VIN 5V and 3A, as needed for the intended application.
- Digital Multimeter – one or more, used to measure input/output voltages and currents.
Optional Equipment
- Oscilloscope – for dynamic testing of voltages (and currents with a current probe, if available).
- Additional Digital Multimeters
Recommended Operating Conditions
Symbol | Description | Value | Units |
---|---|---|---|
VIN, VOUT, LED | 2.7 to 5.5 | V | |
LX | ≤ 6 | V |
Jumper Descriptions
Designator | Name | Description | Default |
---|
P1
| ****
VIN_I2C
| I2C logic supply
· Open: VIN_I2C should be supplied externally from the MPC2221A board via the 4-wire Stemma cable
· VIN: with the jumper present, VIN_I2C is supplied from VIN
| ****
open
P3
| ****
STROBE
| Flash STROBE control input
· GND: STROBE input set low to GND (disabled)
· VIN: STROBE input set high to VIN (enabled)
|
P4
| ****
LED
| Jumper to connect the LED (D1).
To use the on-board LED (D1), the jumper is present. To use an external LED, the jumper is removed.
| ****
LED
P5
| ****
GND
| Jumper to short the 0.1Ω sense resistor (R3).
When the jumper is not present, measuring the voltage across P5 testpoints allows to calculate the LED current ILED = VP5 / 0.1.
| ****
open
Quick-Start Procedures
- Connect one pair of Banana-to-clip power cables to the test points at VIN and GND (left side 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 Banana-to-clip power cables to the VIN bench supply.
- Turn on the VIN bench supply and very slowly ramp its voltage to an appropriate voltage of 3.6V. 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.
- Use a digital multimeter to check the Standby supply current at VIN. For conditions of VIN = 3.6V in Standby mode, it should be below 2A.
- Connect the Stemma QT 4-wire cable (GND, SDA, SCL) to the KTD2690 evaluation board connector CN3, as shown in the Typical Test Setup Figure below.
- Connect the other end of the Stemma QT 4-wire cable to the MCP2221A USB to I2C interface board.
- Connect the MCP2221A board to a computer via the USB type-C cable.
- Connect the MCP2221A board output G0 to the KTD2690 board STROBE testpoint via the wire (STROBE) cable.
- Install GUI software.
Graphical User Interface (GUI)
- Download and install GUI software located on EVAL Kit Page (https://www.kinet-ic.com/ktd2690evab-mmev01/
- After installing software, the interface will appear with the status message “USB Device Attached” at the bottom left side of the window.
- If the displayed message is “USB Device Detached”, make sure the computer is properly connected to the board.
Typical Test Setup Diagram
Use the following test setup for the Quick-Start Procedures.
Graphical User Interface
(GUI) Window
To Check the I2C Connection to the Device
- In the “Reg 0x06 Device ID Register” section, click on the “Read 0x06” button.
- The GUI should display the Device ID equal to 001.
- If the device is not responding (I2C engine timeout), make sure VIN are powered from the 3.6V supply.
To Turn on Flash Mode by I2C Command for 1000ms Duration at 375mA Flash Current
- Set the Flash Current Code in Reg 0x03 register section by selecting “0x1F: 375mA” in the “LED Flash Current Code” list. Then click on “Write 0x03” button.
- Turn on Flash Mode in Reg 0x01 register section by selecting “11: Flash Mode” in the Mode Setting list, and then click on “Write 0x01” button.
- The LED current can be measured briefly by connecting a digital multimeter on P5 header across R3 0.1Ω resistor and GND. For 375mA, the voltmeter should measure a voltage around 38mV.
Electrical Schematic
Bill of Materials (BOM)
Line #| Quantity| Designator| Description| Value| Package| Manufacturer|
Manufacturer Part Number| Digikey Part Number| Mouser Part Number
---|---|---|---|---|---|---|---|---|---
1| 1| C1| CAP 100uF 10V X5R 1206| 100uF| 1206| Murata| GRM31CR61A107ME05L| 490
-GRM31CR61A107ME05LTR-ND| 81-GRM31CR61A107ME5L
2| 1| C2| CAP 10uF 16V X5R 0603| 10uF| 0603| Murata| GRM188R61C106MA73D|
490-7201-1-ND| 81-GRM188R61C106MA3D
3| 1| C3| CAP 10uF 16V X5R 0805| 10uF| 0805| Murata| GRM21BR61C106KE15L|
490-3886-1-ND| 81-GRM21BR61C106KE15
4| 1| CN3| CONN HEADER SMD R/A 4POS 1MM| | | JST Sales America Inc.| SM04B-
SRSS-TB(LF)(SN)| 455-1804-1-ND|
5| 1| D1| LED SST20 WHITE| | SMD| Luminus
Devices Inc.
| SST-20-WCS-B120-L4651| 1214-SST-20-WCS-B120-L4651CT-ND| 896-20WCSB120L4651
6| 1| L1| FIXED IND 1UH 2.9A 48
MOHM SMD
| 1uH| | Murata
Electronics
| DFE201612E-1R0M=P2| 490-16593-1-ND|
7
| ****
2
| ****
P1, P4
| CONN HEADER VERT 6POS 2.54MM| | Through Hole| Sullins Connector
Solutions
| ****
PREC002SAAN-RC
| ****
S1012EC-02-ND
|
8| 1| P3| CONN HEADER VERT
3POS 2.54MM
| | Through
Hole
| Sullins| PREC003SAAN-RC| S1012EC-03-ND|
9
| ****
1
| ****
P5
| CONN HEADER VERT 2POS 2.54MM| | Through Hole| Sullins Connector
Solutions
| ****
PREC002SAAN-RC
| ****
S1012EC-02-ND
|
10| 2| R1, R2| RES 47K 1% 1/10W 0603| DNP| 0603| Yageo| RC0603FR-0747KL|
311-47.0KHRCT-ND| 603-RC0603FR-0747KL
11| 1| R3| RES 0.1 OHM 1% 1/10W
0603
| 0.1R| 0603| Yageo| RL0603FR-070R1L| 311-.10QCT-ND| 603-RL0603FR-070R1L
12| 2| TP1, TP2| TERM TURRET SINGLE
L=5.56MM TIN
| | 1POS| Keystone| 1502-2| 36-1502-2-ND| 534-1502-2
13| 1| TP3| PC TEST POINT MULTIPURPOSE RED| | Through Hole| Keystone| 5010|
36-5010-ND| 534-5010
14| 3| TP4, TP5, TP6| PC TEST POINT MULTIPURPOSE BLACK| | Through Hole|
Keystone| 5011| 36-5011-ND| 534-5011
15
| ****
1
| ****
U1
| Inductorless, Single Flash LED Driver with Programmable 1.5A
Current Source
| | | ****
Kinetic Technologies
| ****
KTD2690EVAB-TR
| |
Printed Circuit Board (PCB)
Additional Test Procedures
To Turn on Torch Mode by I2C Command at 103mA Torch Current
- Set the Torch Current Code in Reg 0x04 register section by selecting “0x22: 103mA” in the “LED Torch Current Code” list. Then click on “Write 0x04” button.
- Turn on Torch Mode in Reg 0x01 register section by selecting “10: Torch Mode” in the Mode Setting list, and then click on “Write 0x01” button.
- The LED current can be measured by connecting a digital multimeter on P5 header across R3 0.1Ω resistor and GND. For 102mA, the voltmeter should measure a voltage around 10mV.
- Turn off Torch Mode in Reg 0x01 register section by selecting “00: Standby” in the Mode Setting list, and then click on “Write 0x01” button.
Troubleshooting
Symptom | Root Cause | Solution |
---|---|---|
“USB Device Detached” displayed on the bottom left of the GUI | MPC2221A board | |
not plugged in to computer or to the EVB | Make sure the MPC2221A board is |
connected to the computer via the USB cable.
Device is not responding to I2C command| MPC2221A board not plugged in to
computer or to the EVB| Make sure the MPC2221A board is connected to EVB
SDA/SCL/GND connector header CN3, and the USB cable is plugged into the
computer.
Device is not responding to I2C command| KTD2690 evaluation board VIN supply
is not powered| Make sure the KTD2690 board VIN testpoint is powered from an
external power supply.
LED is not turning on in Flash mode or in Torch mode| LED not connected on the
board| If using the on-board LED D1, make sure the jumper P4 is present.
Important Notices
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therein.
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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
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