STMicroelectronics STEVAL-L3751V12 User Manual Download Page 20 | Manualshive

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Revision history

Table 3.

Document revision history

Date

Revision

Changes

04-Oct-2022

1

Initial release.

UM3024

UM3024

-

Rev 1

page 20/24

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Summary of Contents for STEVAL-L3751V12

Page 1: ...makes the switching frequency constant and minimizes the output voltage ripple The power good open collector output validates the regulated output voltage for monitoring It implements the output volta...

Page 2: ...connections 1 2 Features 6 to 75 V wide input voltage range Selectable two output voltage level 5 or 12 V 230 kHz switching frequency setting Low drop out operation during line transient Pulse skippi...

Page 3: ...en VIN and GND connectors Step 2 Connect the load power resistor or active load between VOUT and GND connectors Note We suggest using short wires for the connections of steps 1 and 2 Step 3 Set the su...

Page 4: ...can set the frequency between 50 FSW and 120 FSW Pin 3 AGND signal GND Pin 4 SYNCOUT output pin A rectangular waveform is generated from this pin It implements a 180 phase shifted referred to the HO...

Page 5: ...lter consists of a double pi filter with an inductor L2 a ferrite bead L5 MLCC capacitors C18 C19 C20 and C30 an electrolytic capacitor used for a bulk energy storage an input damping By default the f...

Page 6: ...t to use a 200 LMF air flow to decrease the self heating and avoid that OTP occurs The high input current can increase the EMI inductor temperature In this case it is possible to shortcut the inductor...

Page 7: ...conversion applications You can use it to customize a PFC controller for a specific application Start by entering the main specifications for your design Then generate an automatic design or follow a...

Page 8: ...51V12 is a 4 layer PCB with 1 oz copper thickness for external layers and 0 5 oz for internal layers Figure 3 STEVAL L3751V12 PCB layout 1 of 4 Figure 4 STEVAL L3751V12 PCB layout 2 of 4 UM3024 PCB la...

Page 9: ...Figure 5 STEVAL L3751V12 PCB layout 3 of 4 Figure 6 STEVAL L3751V12 PCB layout 4 of 4 UM3024 PCB layout UM3024 Rev 1 page 9 24...

Page 10: ...OOD Figure 7 VIN 48 V VOUT 12 V at no load Figure 8 VIN 48 V VOUT 5 V at no load Figure 9 VIN 48 V VOUT 12 V ROUT 10 ohm Figure 10 VIN 48 V VOUT 5 V ROUT 10 ohm Enable soft start Green VOUT Blue enabl...

Page 11: ...12 VIN 48 V VOUT 12 V at no load Start up with VOUT in short Figure 13 VIN 48 V hiccup Figure 14 VIN 48 V VOUT ripple Figure 15 VIN 48 V VOUT 5 V IOUT 0 A Figure 16 VIN 48 V VOUT 5 V IOUT 15 A UM3024...

Page 12: ...re 19 VIN 48 V VOUT 12 2 V IOUT 5 15 A Figure 20 VIN 24 V VOUT 12 2 V IOUT 5 15 A Load regulation Note Efficiency has been measured with OCP disabled Figure 21 Efficiency curve VOUT 5 V FSW 230 kHz Fi...

Page 13: ...Figure 23 Efficiency curve in DEM VOUT 5 V FSW 230 kHz Figure 24 Efficiency curve in DEM VOUT 12 V FSW 230 kHz UM3024 Performance waveforms UM3024 Rev 1 page 13 24...

Page 14: ...Thermal performance bottom view VIN 48 V VOUT 12 V IOUT 10 A 230 KHz 200 LFM air flow Figure 27 Thermal performance top view VIN 48 V VOUT 5 V IOUT 15 A 230 KHz 200 LFM air flow Figure 28 Thermal per...

Page 15: ...5pF C23 10uF OUTPUT DECOUPLI NG TOP RT C46 10uF VoutS C28 10uF SW BO TTO M R19 18k C36 10uF C16 5600pF C26 10uF PGNDs R9 200k LS C18 10nF L2 8 2uH 1 2 C6 10uF EN UVLO C7 10uF SYNCOUT R10 46 4k C17 150...

Page 16: ...7R Ceramic capacitors Murata GRM32EC72A106KE05 6 2 C32 C15 100 pF 0603 1608 metric 100 V 5 C0G Ceramic capacitors Murata GCM1885C2A101JA16D 7 1 C16 5600 pF 0603 1608 metric 2 5 V 10 X7R Ceramic capaci...

Page 17: ...istor Vishay CRCW06032R20FKTA 25 1 R5 510 r 0603 100 m SMD resistor Bourns CRT0603FY5100ELF 26 2 R7 R8 20 k 0603 100 m SMD resistors Bourns CRT0603FY2002ELF 27 1 R9 200 K 0606 100 m SMD resistor Bourn...

Page 18: ...ic diagrams Bill of materials STEVAL L3751V12A 1 STEVAL L3751V12A schematic diagrams STEVAL L3751V12A bill of materials 1 This code identifies the STEVAL L3751V12 evaluation board first version It is...

Page 19: ...ever there is no guarantee that interference will not occur in a particular installation Standard applied FCC CFR 47 Part 15 Subpart B Test method applied ANSI C63 4 2014 Formal Product Notice Require...

Page 20: ...Revision history Table 3 Document revision history Date Revision Changes 04 Oct 2022 1 Initial release UM3024 UM3024 Rev 1 page 20 24...

Page 21: ...4 3 4 Signal manager J5 4 4 Input EMI filter 5 5 Board setting capability 6 6 eDesignSuite 7 7 PCB layout 8 8 Performance waveforms 10 9 Thermal parameters 14 10 Schematic diagrams 15 11 Bill of mate...

Page 22: ...List of tables Table 1 STEVAL L3751V12 bill of materials 16 Table 2 STEVAL L3751V12 versions 18 Table 3 Document revision history 20 UM3024 List of tables UM3024 Rev 1 page 22 24...

Page 23: ...A 11 Figure 17 VIN 48 V VOUT 12 2 V IOUT 0 A 12 Figure 18 VIN 48 V VOUT 12 2 V IOUT 15 A 12 Figure 19 VIN 48 V VOUT 12 2 V IOUT 5 15 A 12 Figure 20 VIN 24 V VOUT 12 2 V IOUT 5 15 A 12 Figure 21 Effici...

Page 24: ...s and ST assumes no liability for application assistance or the design of purchasers products No license express or implied to any intellectual property right is granted by ST herein Resale of ST prod...

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