Texas Instruments TPS92691 User Manual Download Page 24

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6.

Disclaimers:

6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE

DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.

6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND

CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
THE EVM.

7.

USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS.

USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS

LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

8.

Limitations on Damages and Liability:

8.1

General Limitations

. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,

INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,
LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL
BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.

8.2

Specific Limitations.

IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION

ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.

9.

Return Policy.

Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)

will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.

10.

Governing Law:

These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,

without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
in any United States or foreign court.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2015, Texas Instruments Incorporated

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Summary of Contents for TPS92691

Page 1: ...7 Optimizing EVM Performance Based on LED String Voltage and Current 17 8 TPS92691EVM 001 Assembly Drawing and PCB layout 17 9 Bill of Materials 19 List of Figures 1 Connection Diagram 4 2 TPS92691EV...

Page 2: ...Nominal Operation 14 21 Over Voltage Protection 14 22 SYNC Operation 14 23 PWM Dimming Duty Cycle 50 Frequency 240 Hz 14 24 PWM Dimming Duty cycle 50 Frequency 240 Hz 14 25 PWM Dimming Duty cycle 4 F...

Page 3: ...with either high or low side current sensing implementations The DC current set point can be varied over a 15 1 ratio using the high impedance analog adjust IADJ input An integrated gate driver circui...

Page 4: ...SS pin of the TPS92691 Q1 device The voltage range is from 0 V to 5 V if driven externally The SS voltage can be monitored with this test point Pulling SHUTDOWN to GND will also serve to disable the p...

Page 5: ...lifier can be monitored with this test point The pin can be connected to an external comparator or microcontroller to detect LED short circuit LED to VIN and LED to GND fault conditions 4 Electrical P...

Page 6: ...S92691EVM 001 Schematic Configured With a High Side Current Sense and a High Side Series PFET Device 6 TPS92691 SEPIC LED Driver Evaluation Board SLVUAL8 December 2015 Submit Documentation Feedback Co...

Page 7: ...Alternate Configuration With a Low Side Current Sense and a Low Side Series NFET Device 7 SLVUAL8 December 2015 TPS92691 SEPIC LED Driver Evaluation Board Submit Documentation Feedback Copyright 2015...

Page 8: ...wing performance curves are presented for the EVM configured with a high side current sense resistor and a series PFET device Figure 2 The EVM circuit can be modified to implement low side current sen...

Page 9: ...ent mA 5 10 15 20 25 30 35 40 99 99 5 100 100 5 101 D004 LEDs 3 LEDs 7 LEDs 13 www ti com Performance Data and Typical Characteristic Curves 6 2 Line Regulation Figure 7 Output LED Current vs Input Vo...

Page 10: ...98 5 99 99 5 100 100 5 101 101 5 102 D007 VIN 10V VIN 14V VIN 18V Performance Data and Typical Characteristic Curves www ti com 6 3 Load Regulation Figure 10 Output LED Current vs LED String Configura...

Page 11: ...00mA ILED 300mA ILED 500mA www ti com Performance Data and Typical Characteristic Curves 6 4 Temperature Characteristics Figure 13 LED Current Error vs Ambient Temperature VIN 14 V Number of LEDs in s...

Page 12: ...resistor divider network R23 and R4 The internal reference clamp of 2 4 V can be activated by depopulating resistor R4 and connecting IADJ to VCC through pull up resistor R23 External control via IADJ...

Page 13: ...VIADJ VIN 14 V Number of LEDs in Series 3 6 6 PWM Dimming In order to enable EVM at power up the PWM pin of TPS92691 Q1 is tied to VCC through a 100 k pullup resistor R14 The PWM pin can be over driv...

Page 14: ...ge Time 400 ms div spaCh3 Switch sense current resistor R15 voltage Time 1 s div Figure 21 Over Voltage Protection Figure 22 SYNC Operation spaCh1 DDRV voltage Ch2 PWM input TP3 spaCh1 DDRV voltage Ch...

Page 15: ...re 26 PWM Dimming Duty cycle 4 Frequency 240 Hz 240 Hz spaCh2 IADJ voltage Ch3 IMON voltage spaCh1 IMON voltage Ch2 IADJ voltage spaCh4 LED current Time 200 s div spaCh4 LED current Time 10 s div Figu...

Page 16: ...Ch4 LED current Time 1 ms div Figure 30 Start Stop Warm Crank Transient Response 6 8 EMI Figure 31 Conducted EMI Based on CISPR 25 Class 3 Limits 16 TPS92691 SEPIC LED Driver Evaluation Board SLVUAL8...

Page 17: ...is achieved by pulling the IADJ pin to VCC through an external resistor The slope compensation voltage can be adjusted by changing the switch current sense resistor RIS R15 based on the maximum expect...

Page 18: ...ti com Figure 33 Top Layer and Top Overlay Top View Figure 34 Bottom Layer and Bottom Overlay Bottom View 18 TPS92691 SEPIC LED Driver Evaluation Board SLVUAL8 December 2015 Submit Documentation Feed...

Page 19: ...3 1 100pF CAP CERM 100 pF 50 V 5 C0G NP0 0603 C1608C0G1H101J TDK C28 1 0 01uF CAP CERM 0 01 F 100 V 10 X8R 0603 C1608X8R2A103K TDK D1 1 30V Diode Schottky 30 V 0 2 A SOD 323 SOD 323 BAT54HT1G ON Semic...

Page 20: ...03 CRCW060310K0FKEA Vishay Dale R15 1 0 06 RES 0 06 1 1 W 2010 2010 CSRN2010FK60L0 Stackpole R16 1 1 00k RES 1 00 k 1 0 25 W 1206 1206 CRCW12061K00FKEA Vishay Dale R17 1 0 RES 0 5 0 25 W 1210 1210 MCR...

Page 21: ...ing the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repa...

Page 22: ...transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indic...

Page 23: ...ified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sens...

Page 24: ...REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE L...

Page 25: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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