NIS54xxGEVB NIS54xx Evaluation Board User`s Manual
Contents
1. Resistors eFuse r vin Switch to Short Circuit the Output Semicon J NIS54x GEVA REV 1 6 UC ji of BOAR V ka ae f mS ENABLEJ S CIRL V amp y Load Resistors Kelvin or Direct Sensing Output Capacitors Figure 3 Features of the evaluation board http onsemi com NIS54xxGEVB NIS5431 Overvoltage Protection Connect the eFuse to a variable DC power supply Place jumpers J2 10 Q J1 5431 J4 J8 and J13 Turn the power supply from 3 3 to 10 V to observe the overvoltage protection circuit in operation The input voltage will rise but the output voltage will be maintained at the Vclamp level of about 3 8 V After conducting 1 1 A with a voltage drop of 6 2 V the device will reach its thermal shutdown point and latch off The green indicator LEDs will turn off and the yellow fault indicator LED will be on An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Ch Source Output voltage Ch4 Enable Yoltage Ch a Y Che 5 0 Y M 40 0mm 6 5k T6Opspt Cha A Ch4 5 0 Y A ChI 5 97 Figure 4 In this test the input voltage blue trace is brought to 10 V The output voltage red trace is clamped at 3 8 V After some time the device enters thermal shutdown2. http onsemi com NIS54xxGEVB NIS5431 Reset from Thermal Shutdown Continue with jumpers J2 10 Q J1 5431 J4 J8 and J13 Once the eFuse reaches thermal shutdown the enable pin will fall to 1 4 V Return the power supply to 3 3 V and press the blue button to reset the eFuse An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Ch Source Output voltage Ch a Y Che 5 0 Y M 40 0mm 6 5k T60pENot Cha A Ch4 5 0 Y A Ch4 BOON Figure 5 This test shows how the enable pin is used to reset the device after a thermal shutdown event After pressing the blue button the enable pin falls to 0 V and then comes to about 3 3 V after releasing the blue button At that point the eFuse turns on An auto retry device will reset automatically from thermal shutdown and pressing the blue button is not necessary http onsemi com NIS54xxGEVB NIS5431 Overcurrent Protection Continue with jumpers J2 10 Q J1 5431 J4 J8 and J13 With VCC set to 3 3 V press the large green button to short circuit the output A power supply capable of supplying more than 3 A is recommended The mechanical switch will bounce but the eFuse will have no issue responding to this disturbance It will respond to the fault within 10 us and the current wi
3. input cable is manually plugged into the board The eFuse limits the current enters thermal shutdown and latches off Auto retry devices such as the NIS5450MT2 will not latch off http onsemi com
4. the enable pin falls to 1 4 V Return the power supply to 5 V and press the blue button to reset the eFuse An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between States Chi Yor Che Source Output Yoltage Ch3 Total Input Current Ch4 Enable voltage Ch 5 0 Che 5 0 Y M 40 Orme 125k5 8 oO pst Ch 1 04 Ch4 o 0 A Che FOO Figure 11 This test shows how the enable pin is used to reset the device after a thermal shutdown event After pressing the blue button the enable pin falls to 0 V and then comes to about 3 3 V after releasing the blue button At that point the efuse turns on An auto retry device such as the NIS5450MT2 will reset automatically from thermal shutdown and pressing the blue button is not necessary http onsemi com NIS54xxGEVB NIS545x Overcurrent Protection Continue with jumpers J2 10 Q J1 545x J4 and J13 With VCC set to 5 V press the large green button to short circuit the output A power supply capable of supplying more than 3 A is recommended The mechanical switch will bounce but the eFuse will have no issue responding to this disturbance It will respond to the fault within 10 us and the current will be limited to the short circuit current limit level After some time the device will enter thermal shutdown due to
5. 10 Q on the board e A pushbutton switch to short circuit the load featuring an indicator LED which is on when the output voltage is high during normal operation e Aneasy means of connecting an external copper heat sink for thermal evaluation e Kelvin or direct sensing options via the jumper between pin 1 and 2 for the NIS54xx NIS54xxGEVB J18 DELTRON RED O Ja O J14 vcc Q J23 J24 TP HOOK TP HOOK TP HOOK J19 DELTRON BLACK J15 J16 TP HOOK TP HOOK 0 O DELTRON YELLOW J17 no Q J5 TP HOOK TP HOOK TP HOOK Co ps m m e MI We va et ec rng SHORT RESET amp 3 _ F o S 880R a 3 a a L i a al T3 ie 21 m swt R12 lt c1 c2 R2 RG DELTRON BLACK 1 2 PB SW 10K c3 5RISW 10R 5W 5 10uF 16V O 1uF O tuF 7 4 8 a og a N ca E sw702 aua an SW DPDT 4 a J3 Hix4 NIS5431 o00 NIS54xx ie J1 HEADER 3 J22 J12 J11 voc vec vec P TP HOOK TP HOOK TP HOOK po pn T i i j 1M 1K HS1 HEAT SINK 3 w gt R7 3M 3 8 w l a2 a 9 E z D2 a x iH z S E kj S 3 1 1M c6 3 m Figure 2 Schematic for the evaluation board The user s manual is divided into two sections The first section is for the NIS5431 3 3 V series of devices The second section covers the NIS545x 5 V series of devices For these devices ensure that J1 is in the 54xx position DC Jack Controlled Slew Rate Capacitor Input Capacitors Enable Reset Switch Current Limit
6. NIS54xxGEVB NIS54xx Evaluation Board User s Manual eFuse test board with multiple subcircuits for evaluation of overvoltage protection overcurrent protection controlled slew rate and thermal shutdown features Introduction Engineers developing a varied array of systems utilize sophisticated integrated eFuses to serve a variety of purposes They may be found connected to 3 3 5 and 12 V power rails and have many interesting features The primary features of eFuses are e Overvoltage clamping e Adjustable current limiting e Enable Fault control e Thermal shutdown e Controllable slew rate f Vini J23 Vou ON Semiconductor NIS54xx GEVAL BOARD REV 1 6 Figure 1 The NIS545xGEVB evaluation board Semiconductor Components Industries LLC 2015 April 2015 Rev 2 ON Semiconductor EVAL BOARD USER S MANUAL This evaluation board has many features which make it simple to observe the functionality and performance of the new NIS54xx line of eFuses e Multiple connectors available for all eFuse pins VCC GND enable ILIM dv dt e Input and output capacitors e A pushbutton switch and a MOSFET connect the enable pin to GND or float it as needed e Green and yellow LEDs to indicate whether the eFuse enable pin voltage is high device enabled or low device disabled e Three current limit resistor options available directly on the board 10 18 50 Q e Two load resistor options 5 and
7. he eFuse limits the current enters thermal shutdown and latches off Auto retry devices such as the NIS5450MT2 will not latch off http onsemi com NIS54xxGEVB NIS545x Overvoltage Protection Connect the eFuse to a variable DC power supply Place jumpers J2 10 Q J1 545x J4 and J13 Turn the power supply from 5 to 10 V to observe the overvoltage protection circuit in operation The input voltage will rise but the output voltage will be maintained at the Vclamp level of about 6 V After conducting 1 5 A witha voltage drop of 4 V the eFuse will reach its thermal shutdown point and latch off The green indicator LEDs will turn off and the yellow fault indicator LED will be on An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Chea Source Output Yoltage Ch3 Total Input Current Ch Enable voltage Ch 5 0 Che 5 0 Y M 40 0mm 6 5k TBOpspt Cha 1 04 Ch4 5 0 A Chl bby Figure 10 In this test the input voltage blue trace is brought to 10 V The output voltage red trace is clamped at about 6 V After some time the device enters thermal shutdown http onsemi com NIS54xxGEVB NIS545x Reset from Thermal Shutdown Continue with jumpers J2 10 Q J1 545x J4 and J13 Once the eFuse reaches thermal shutdown
8. ll be limited to the short circuit current limit level After some time the device will enter thermal shutdown due to the high current and voltage between VCC and source output voltage pins An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Ch Source Output voltage Y Che 5 0 Y M 4 Orns 1 25M SONE Ch4 5 0 A Cas aber Figure 6 This is a demonstration of the current limiting circuit The eFuse responds quickly to the short circuit event and begins conducting at the short circuit current limit http onsemi com NIS54xxGEVB NIS5431 Controlled slew rate Continue with jumpers J2 10 Q J1 5431 J4 J8 and J13 Perform this test with and without the J6 jumper in place to observe how the duration of the controlled slew rate changes When J6 is in place the slew rate will be longer because a capacitor is connected between the dv dt pin and GND With VCC set to 3 3 V press and release the blue button to see the eFuse turn on with a controlled output voltage slew rate Chi Yor l Chea Source Output Yoltage Ch 9 Y Che 5 0 Y M 40 0mm be sks 16 0patt Cha Ch4 5 0 A Che 1 04 Figure 7 This is a demonstration of the controlled slew rate circuit with J6 in place Without J6 in place the slew rate will be l
9. ower http onsemi com NIS54xxGEVB NIS5431 Hot Plug Power On Use jumpers J2 10 Q J1 5431 J4 J6 J8 and J13 Manually take the 3 3 V power cable and plug it into the demo board Observe that the eFuse turns on with no issue and the output voltage rises in a controlled fashion Chi Yor l Ch Source Output Yoltage Ch a Y Che 5 0 Y M 40 0mm be sks 16 0patt Cha Ch4 5 0 A Chi s 1 57 Figure 8 This shows a standard hot plug test The input cable is manually plugged into the board and the output voltage rises slowly to minimize inrush current http onsemi com NIS54xxGEVB NIS5431 Hot Plug Power On into a Short Circuit Use jumpers J2 10 Q J1 5431 J4 J6 J8 and J13 Short circuit the output and manually take the 3 3 V power cable and plug it into the demo board The eFuse briefly turns on and conducts at the short circuit current limit level After some time the devices reaches the thermal shutdown level and latches off An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Ch Source Output Yoltage Ch 2 Y Che o 0 Y M 100m 25 OKS s 40 0 pst Cha Ch4 5 0 Y A Chi s 1 57 Figure 9 This shows a hot plug test into a short circuit The input cable is manually plugged into the board T
10. the high current and voltage between VCC and source output voltage pins An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor l Ch Source Output voltage Ch3 Total Input Current Chd Enable voltage Ch 5 0 Che 5 0 Y M4 Orme 1 25M SONE Cha 1 04 Ch4 5 0 A Cha 2 ser Figure 12 This is a demonstration of the current limiting circuit The eFuse responds quickly to the short circuit event and begins conducting at the short circuit current limit http onsemi com NIS54xxGEVB NIS545x Controlled slew rate Continue with jumpers J2 10 Q J1 545x J4 and J13 Perform this test with and without the J6 jumper in place to observe how the duration of the controlled slew rate changes When J6 is in place the slew rate will be longer because a capacitor is connected between the dv dt pin and GND With VCC set to 5 V press and release the blue button to see the eFuse turn on with a controlled output voltage slew rate Chi Yor l Ch Source Output voltage Ch3 Total Input Current Ch4 Enable voltage Ch 5 0 Che 5 0 Y M 40 0mm be sks 16 0patt Cha 1 04 Ch4 5 0 A Che 1 17 Figure 13 This is a demonstration of the controlled slew rate circuit with J6 in place Without J6 in place the slew rate will be lower ht
11. tp onsemi com NIS54xxGEVB NIS545x Hot Plug Power On Use jumpers J2 10 Q J1 545x J4 J6 and J13 Manually take the 5 V power cable and plug it into the demo board Observe that the eFuse turns on with no issue and the output voltage rises in a controlled fashion Chi Yor Che Source Output Voltage Cha Total Input Current Ch Enable Voltage Ch 5 0 Che 5 0 M 40 0mm be sks 16 0patt Cha 1 04 Ch4 5 0 Y A Chi 1 04 Figure 14 This shows a standard hot plug test The input cable is manually plugged into the board and the output voltage rises slowly to minimize inrush current http onsemi com NIS54xxGEVB NIS545x Hot Plug Power On into a Short Circuit Use jumpers J2 10 Q J1 545x J4 J6 and J13 Short circuit the output and manually take the 5 V power cable and plug it into the demo board The eFuse briefly turns on and conducts at the short circuit current limit level After some time the eFuse reaches the thermal shutdown level and latches off An auto retry eFuse MT2 part number suffix does not latch and automatically cycles the enable pin For auto retry eFuses the demo board s green and yellow indicator enable pin indicator LEDs will flash as the enable pin cycles between states Chi Yor Che Source Output Voltage Cha Total Input Current Ch Enable Voltage Ch 5 0 Che 5 0 Y M 10 0mm 2505 5 4 Opspt Ch 1 04 Ch4 5 0 A Chi 1 04 Figure 15 This shows a hot plug test into a short circuit The
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