# 12V PWM Open Collector ## Description Universal PWM Interface Module: 12 V automotive-input board for configurable ECU PWM input conditioning and open-collector fan-module output, with TVS/reverse-polarity/PTC protection, 5 V buck, 3.3 V LDO, selectable pull-up rails, inversion jumper, status LEDs, test pads, mounting holes, and DT13-08PA connector placeholder. ## Project Details - **Owner:** westridgecw - **Created:** 7/5/2026 - **Last Updated:** 7/8/2026 - **Visibility:** Public ## Key Components ### D1 — [SMBJ24A](https://www.flux.ai/cherepanyadima/smbj24a~2b.md) - Manufacturer Name: Taiwan Semiconductor Corporation - Part Type: TVS - Role Details: SMBJ24A unidirectional TVS on fused 12V input protection node - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/SMBJ%20SERIES_R2104.pdf - Role: Protection - Manufacturer Part Number: SMBJ24A **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SS54B](https://www.flux.ai/openpartlist/ss54b~s6.md) - Part Type: Diode - Role: Flyback / Freewheeling - Manufacturer Part Number: SS56B - Reverse Voltage: 60V - LCSC Part Number: C360459 - Role Details: 60V/5A SMB Schottky catch diode for LMR16006 buck SW node, upgraded from 40V SS54B for better transient margin. - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2409302300_Chongqing-Pingwei-Tech-SS56B_C360459.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: PINGWEI **Pins:** - A [pin 2] - K [pin 1] ### D3 — [BZT52C15-13-F](https://www.flux.ai/adrian95/bzt52c15-13-f~6m.md) - Role: Protection - Manufacturer Name: Diodes Incorporated - Role Details: 15V gate-source clamp for Q1; cathode to Q1 source / VIN_PROTECTED_12V, anode to Q1 gate. - Manufacturer Part Number: BZT52C15-13-F - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### D4 — [150080VS75000](https://www.flux.ai/jecstronic/150080vs75000~qx.md) - Part Type: LED - Manufacturer Part Number: 150080VS75000 - Role Details: Green 0805 power indicator LED - Role: Current Limiting - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth - Datasheet URL: https://www.we-online.com/katalog/datasheet/150080VS75000.pdf **Pins:** - A [pin 2] - K [pin 1] ### D5 — [150080VS75000](https://www.flux.ai/jecstronic/150080vs75000~qx.md) - Datasheet URL: https://www.we-online.com/katalog/datasheet/150080VS75000.pdf - Manufacturer Name: Würth - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Amber 0805 PWM activity indicator LED; footprint remains 0805 LED geometry - Role: Current Limiting - Manufacturer Part Number: 150080AS75000 - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### F1 — [1210L075/24PR](https://www.flux.ai/adrian95/1210l07524pr~j6w.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Fuse - Manufacturer Name: Littelfuse Inc. - Role Details: 24V-rated 0.75A hold resettable PTC fuse on raw 12V input; selected to avoid the previous 12V maximum-voltage margin issue. - Datasheet URL: https://www.littelfuse.com/media?resourcetype=datasheets&itemid=b3a2be92-83a1-491d-9c6d-dc64451de047&filename=1210l_datasheet_update.pdf - Role: Protection - Manufacturer Part Number: 1210L075/24PR **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — DT13-08PA - Package or Case Code: RHDR - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/14697881695ef12e46ee200e417b3308546da26c557ed033035d3e30bf359db2.pdf - Role: Connector - Digi-Key Part Number: 1111-DT13-08PA-ND - Mount: Through Hole - Part Type: Connectors - Role Details: Real DT13-08PA connector: pin1 12V input, pin2 GND, pin3 fan PWM open-collector output, pin4 ECU PWM input, pins5-8 spare/NC. - Manufacturer Name: TE Connectivity - Manufacturer Part Number: DT13-08PA **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### Q1 — [DMP3013SFV](https://www.flux.ai/kicad-part-library/dmp3013sfv~5bo.md) - LCSC Part Number: C461071 - Role Details: High-side P-channel MOSFET reverse-polarity protection; drain faces VIN_FUSED_12V, source feeds VIN_PROTECTED_12V, gate pulled down through R10 and VGS clamped by D3. - Package or Case Code: Diodes_PowerDI3333-8 - Datasheet URL: https://www.diodes.com/assets/Datasheets/DMP3013SFV.pdf - Manufacturer Part Number: DMP3013SFV-13 - Role: Reverse Polarity Protection - Manufacturer Name: Diodes Incorporated **Pins:** - D [pin 5] - G [pin 4] - S [pin 1] - S [pin 3] - S [pin 2] ### Q2 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf - Manufacturer Part Number: MMBT2222ALT3G - Part Type: Transistor - Role: Switching - Role Details: Inverts GP03 PWM so final 2N2222A sinks less as commanded high-time duty increases **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q3 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - Manufacturer Part Number: MMBT2222ALT3G - Role Details: Final 2N2222A-family open-collector low-side fan PWM output driver - Part Type: Transistor - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switching - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### U1 — [LMR16006YQ5DDCRQ1](https://www.flux.ai/lcsc/lmr16006yq5ddcrq1~tk2y.md) - Role Details: TI LMR16006Y-Q1 fixed 5V automotive buck regulator; fixed-output FB senses 5V rail; SHDN tied to VIN_PROTECTED_12V - Role: Regulator - Manufacturer Name: Texas Instruments - Part Type: DC-DC Converters - Package or Case Code: TSOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - JLCPCB Part Class: Extended Part - LCSC Part Number: C962072 - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr16006y-q1.pdf - Manufacturer Part Number: LMR16006YQ5DDCRQ1 **Pins:** - ~{SHDN} [pin 4] - CB [pin 1] - FB [pin 3] - GND [pin 2] - SW [pin 6] - VIN [pin 5] ### U2 — [TPS7B8633BQDDARQ1](https://www.flux.ai/jecstronic/tps7b8633bqddarq1~nzo.md) - Role: Power Conversion - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TPS7B8633BQDDARQ1 - Manufacturer Name: Texas Instruments Inc. - Role Details: TPS7B8633-Q1 automotive 3.3V LDO from 5V rail; low-current pull-up/reference rail for configurable PWM interface options - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps7b86-q1.pdf **Pins:** - EN [pin 7] - EP [pin 9] - FB/NC [pin 2] - GND [pin 5] - IN [pin 8] - NC_1 [pin 3] - NC_2 [pin 4] - NC_3 [pin 6] - OUT [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/westridgecw/12v-pwm-open-collector~5t](https://www.flux.ai/westridgecw/12v-pwm-open-collector~5t).* --- *Generated from [https://www.flux.ai/westridgecw/12v-pwm-open-collector~5t](https://www.flux.ai/westridgecw/12v-pwm-open-collector~5t)*