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Test Procedure and Results

SLVUBM3B – January 2019 – Revised December 2019

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LM76202-Q1 Evaluation Module

Table 5. Default Jumper Setting for LM76202-Q1EVM

Jumper

Position

Closed

Closed between

Pin 2 and 3

Closed

Closed between

Pin 1 and 2

Closed

between Pin 1

and 2

Open

Description

D1 (RED) Is

powered from

VOUT

UVLO = 4 V

D4 (Green) Is
powered from

VOUT

Current limit with

auto-retry (MODE

= RTN)

ILIM = 2.23 A

UVLO is not set from R2 and

R5 resistors.

Figure 2. LM76202-Q1 EVM Setup

Test Procedure and Results

6.1

Hot-Plug Test

Use the following instructions to measure the output slew rate and input inrush current during Hot-Plug
event.

•

Set the input supply voltage VIN to 12.5 V and current limit of 10 A. Enable the power supply.

•

Hot-plug the supply at input connector T1.

•

Observe the waveform at VIN, VOUT, FLT and IIN with an oscilloscope to measure the output slew
rate and rise time .

Figure 3

shows an example of inrush current captured on the LM76202-Q1EVM.

Содержание LM76202-Q1

Страница 1: ...hematic 3 2 LM76202 Q1 EVM Setup 5 3 LM76202 Q1EVM Output Slew Rate with Inrush Current Limiting VIN 12 5 V CdVdT 12 nF COUT 47 µF No load 6 4 LM76202 Q1EVM Current Limit Operation VIN 12 5 V ILIM 2 23 A ROUT 3 Ω MODE RTN 7 5 LM76202 Q1EVM Output Hot Short VIN 12 5 V ILIM 2 23 A MODE RTN 8 6 LM76202 Q1EVM Output Overvoltage Protection VIN 36 V ILIM 2 23 A ROUT 28 Ω MODE RTN 9 7 LM76202 Q1EVM Wake ...

Страница 2: ...tput overvoltage protection 34 V Load protection from transients ISO 7637 2 Pulse 1 and ISO 16750 2 Pulse 5b UVLO configuration using onboard jumpers LED status indication for FLT output and VOUT 1 2 EVM Applications Automotive ECU protection Camera supply protection Telematics Industrial transport 2 Description The LM76202 Q1EVM enables evaluation of LM76202 Q1 and LM74202 Q1 ideal diodes Table 1...

Страница 3: ...ng load 4 1 1 Test Points Description Table 3 Test Points Description Test Points Label Description TP1 FLT FLT Signal output TP2 VIN1 Positive voltage input TP3 VOUT1 Positive voltage output TP6 RTN1 RTN signal TP7 GND Input ground signal TP8 GND Output ground signal Table 4 Jumper Description Jumper Label Description J1 Pull up for FLT This jumper is used for pulling up FLT to VOUT OPEN For pull...

Страница 4: ...etting UVLO CLOSED R2 and R5 resistor are used for setting UVLO 5 Test Equipment and Setup 5 1 Power Supplies One adjustable power supply 0 V to 60 V output 0 A to 10 A output current limit UCS 200N and LD 200N for generating transient voltages as per ISO 7637 2 and ISO 16750 2 specifications 5 2 Meters One DMM needed 5 3 Oscilloscope A DPO2024 or equivalent three 10x voltage probes and a DC curre...

Страница 5: ...Green Is powered from VOUT Current limit with auto retry MODE RTN ILIM 2 23 A UVLO is not set from R2 and R5 resistors Figure 2 LM76202 Q1 EVM Setup 6 Test Procedure and Results 6 1 Hot Plug Test Use the following instructions to measure the output slew rate and input inrush current during Hot Plug event Set the input supply voltage VIN to 12 5 V and current limit of 10 A Enable the power supply H...

Страница 6: ...structions to perform current limit test Set the input supply voltage VIN to 12 5 V and current limit of 10 A and enable the power supply Connect the power supply on connector T1 of the EVM By default the EVM is configured for 2 23 A current limit Connect a load of 3 Ω 20 W at connector T2 of the EVM The device limits the current to 2 23 A turns off the internal MOSFET after reaching the thermal s...

Страница 7: ...N 6 3 Output Hot Short Test Use the following instructions to perform output Hot Short test Set the input supply voltage VIN to 12 5 V and current limit of 10 A and enable the power supply Short the output of the device on connector T2 VOUT to GND with a short and thick wire 5cm long and 4 sq mm thick Observe the waveforms of VIN VOUT FLT and IIN using an oscilloscope Figure 5 shows an example of ...

Страница 8: ...RTN 6 4 Overvoltage Cut off Protection Test Use the following instructions to perform output overvoltage protection test Set the input supply voltage VIN to 36 V and current limit of 10 A and enable the power supply Connect a load of 28 Ω 30 W at connector T2 of the EVM Observe the waveforms of VIN VOUT FLT and IOUT using an oscilloscope Figure 6 shows an example of overvoltage cutoff protection o...

Страница 9: ... 6 5 Wake up Into Short Test Use the following instructions to perform Wake up into Short test Set the input supply voltage VIN to 12 5 V and current limit of 10 A and enable the power supply Short the output of the device on connector T2 VOUT to GND with a short and thick wire 5cm long and 4 sq mm thick Observe the waveforms of VIN VOUT FLT and IIN using an oscilloscope Figure 7 shows an example ...

Страница 10: ...est Select the ISO 7637 2 Pulse 1 in UCS 200N simulator Set the parameters for pulse as Battery voltage 12 V Us 150 V Ri 10 Ω tr 1 µs t1 0 5 s t2 200 ms Connect the output of UCS 200N to input connector T1 of the EVM Connect a load of 12 Ω on the output connector T2 of the EVM Enable the output of UCS 200N and start the test Observe the waveforms of VIN VOUT and IOUT using an oscilloscope Figure 8...

Страница 11: ...age transient test Select the ISO 16750 2 Pulse 5b in LD 200N simulator Set the parameters for pulse as U s or Vp 21 V Ri 0 5 Ω tr 5 ms t1 60 s td 100 ms Connect the output of LD 200N to input connector T1 of the EVM Connect a load of 14 Ω on the output connector T2 of the EVM Enable the output of LD 200N and start the test Observe the waveforms of VIN VOUT and IOUT using an oscilloscope Figure 9 ...

Страница 12: ...uation Module Figure 9 LM76202 Q1EVM Positive Input Voltage Transient Test 12 V battery voltage transient voltage 36 V RLOAD 14 Ω 7 Board Layout Figure 10 and Figure 11 show component placement of the EVM Board Figure 12 and Figure 13 show PCB layout for top and bottom layers of the EVM Figure 10 LM76202 Q1EVM Top Assembly Figure 11 LM76202 Q1EVM Bottom Assembly ...

Страница 13: ...AA TDK C4 1 47 uF CAP AL 47 uF 63 V 20 AEC Q200 Grade 2 SMD D8xL10 2mm EEE HA1J470UP Panasonic C6 1 0 012 uF CAP CERM 0 012 uF 100 V 10 X7R 0603 0603 C0603C123K1RACTU Kemet D1 1 Red LED Red SMD Red LED 1 6x0 8x0 8mm SML D12U1WT86 Rohm Semiconductor D2 1 33 V Diode TVS Bi 33 V SMC SMC SMCJ33CA 13 F Diodes Inc D3 1 60 V Diode Schottky 60 V 2 A SMA SMA B260A 13 F Diodes Inc D4 1 Green LED Green SMD 1...

Страница 14: ... 36 k RES 5 36 k 1 0 1 W AEC Q200 Grade 0 0603 0603 CRCW06035K36FKEA Vishay Dale R13 1 8 06 k RES 8 06 k 1 0 1 W AEC Q200 Grade 0 0603 0603 CRCW06038K06FKEA Vishay Dale R14 1 12 1 k RES 12 1 k 1 0 1 W AEC Q200 Grade 0 0603 0603 CRCW060312K1FKEA Vishay Dale R15 1 60 4 k RES 60 4 k 1 0 1 W AEC Q200 Grade 0 0603 0603 CRCW060360K4FKEA Vishay Dale TP1 TP6 TP4 TP5 4 Test Point Multipurpose White TH Whit...

Страница 15: ...e numbers in the current version Changes from A Revision September 2019 to B Revision Page Updated Section 1 2 Updated Section 2 2 Added Section 9 14 Changes from Original January 2019 to A Revision Page Changed 10 A DC load from 55 V to 60 V in Section 5 4 4 Changes made in Section 6 4 8 Updated Figure 6 9 Changes made in Section 6 7 11 Updated Figure 9 12 Updated Figure 10 and Figure 11 12 Updat...

Страница 16: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Страница 17: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Страница 18: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Страница 19: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Страница 20: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM 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...

Страница 21: ...se resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for...

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