# 12V TEC Phone Cooler 29d1 ## Description 12V analog temperature-controlled TEC phone cooler: NTC sensor switches a TEC and fan at about 40°C using a comparator, with DC input protection and no MCU/firmware. ## Project Details - **Owner:** ka000 - **Created:** 7/18/2026 - **Last Updated:** 7/18/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### D1 — [SMAJ13CA](https://www.flux.ai/adrian95/smaj13ca~3di.md) - Part Type: Diode - Role Details: 13V bidirectional TVS across protected 12V input - Datasheet URL: https://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smaj_datasheet.pdf.pdf - Manufacturer Name: Littelfuse Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SMAJ13CA - Role: Protection **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SS14](https://www.flux.ai/lcsc/ss14~t679.md) - Package or Case Code: SMA_L4.3-W2.7-LS5.1-RD - Part Type: Schottky Barrier Diodes (SBD) - Datasheet URL: https://www.lcsc.com/datasheet/C2766061.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1JfUFRQQFlfUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Manufacturer Name: WPMtek(维攀) - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C2766061 - Max Reverse Voltage: 40V - Role: Protection - Manufacturer Part Number: SS14 - Diode Type: Schottky Diode - Role Details: Schottky flyback diode from switched negative node to +12V for fan load - Forward Voltage: 0.45V-0.50V - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - K [pin 1] ### D3 — [SM0805HCL](https://www.flux.ai/adrian95/sm0805hcl~2dj.md) - Datasheet URL: https://www.bivar.com/parts_content/Datasheets/SM0805HCL.pdf - Manufacturer Part Number: SM0805HCL - Role: Indicator - Part Type: LED - Manufacturer Name: Bivar Inc. - Role Details: Red LED indicates MOSFET/load output active - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### F1 — [2920L500/24SL](https://www.flux.ai/silicon-yard/2920l50024sl.md) - Manufacturer Name: Littelfuse - Datasheet URL: https://www.mouser.fr/datasheet/2/240/littelfuse_ptc_low_rho_datasheet_pdf-1901322.pdf - Part Type: Circuit Protection Devices - Mount: Surface Mount - Role Details: 5A hold PPTC input protection for 12V TEC/fan rail - Manufacturer Part Number: 2920L500/24SL - Package or Case Code: SMD - Role: Protection **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [DC-005](https://www.flux.ai/cherepanyadima/dc-005.md) - Manufacturer Name: Best Inc - Role: Power Input - Part Type: Connectors - Role Details: 12V center-positive DC input jack, target 5A adapter - Datasheet URL: https://www.snapeda.com/parts/DC-005/Best%20Inc./datasheet/ - Manufacturer Part Number: DC-005 **Pins:** - ~ [pin 2] - ~ [pin 4] - ~ [pin 3] ### J2 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Output Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Manufacturer Name: Ningbo Xinlaiya Elec. - Manufacturer Part Number: XY301V-A-5.0-2P - Role Details: TEC output: +12V protected and MOSFET-switched negative return - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J3 — [XY301V-A-5.0-2P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-2p~u6.md) - Role: Output Connector - Datasheet URL: https://www.lcsc.com/datasheet/C557651.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=E1BYV1AHFgUMXgFVQ1AMU1JVQFReXgIATwJfA10DFVkxVlNRT1dXXlVTQ1hbUjsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D - Part Type: Connector - Manufacturer Name: Ningbo Xinlaiya Elec. - Role Details: Fan output: +12V protected and MOSFET-switched negative return - Manufacturer Part Number: XY301V-A-5.0-2P **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J4 — [B2B-XH-AM(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-amlfsn~ng1.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Sensor Connector - Manufacturer Part Number: B2B-XH-AM(LF)(SN) - Manufacturer Name: JST Sales America Inc. - Role Details: External 2-wire 10k B3950 NTC probe input; open sensor should leave cooling off **Pins:** - P1 [pin 1] - P2 [pin 2] ### Q1 — [SISS52DN-T1-GE3](https://www.flux.ai/adrian95/siss52dn-t1-ge3.md) - Role: Power Switch - Role Details: Low-side N-MOSFET switching up to about 5A combined TEC/fan load; layout needs copper heat spreading - Part Type: Transistors - Datasheet URL: https://www.vishay.com/docs/79977/siss52dn.pdf - Manufacturer Name: Vishay - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SiSS52DN-T1-GE3 **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - D_6 [pin 10] - D_7 [pin 11] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### RT1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: H_AXIAL-P7.62_D2.5 - Role: Sensing (Shunt) - Exclude from PCB: true - Role Details: External 10k B3950 NTC thermistor probe mounted on phone; excluded from PCB - Resistance: 10kΩ - Beta: 3950K - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [LM393DR2G](https://www.flux.ai/adrian95/lm393dr2g~98s.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Comparator - Manufacturer Name: onsemi - Manufacturer Part Number: LM393DR2G - Part Type: Integrated Circuit - Datasheet URL: https://www.onsemi.com/pdf/datasheet/lm393-d.pdf - Role Details: 12V-powered thermistor threshold comparator; open collector output drives MOSFET gate pullup **Pins:** - GND [pin 4] - INPUTSA_1 [pin 2] - INPUTSA_2 [pin 3] - INPUTSB_1 [pin 5] - INPUTSB_2 [pin 6] - OUTPUTA [pin 1] - OUTPUTB [pin 7] - VCC [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ka000/12v-tec-phone-cooler-29d1~v7](https://www.flux.ai/ka000/12v-tec-phone-cooler-29d1~v7).* --- *Generated from [https://www.flux.ai/ka000/12v-tec-phone-cooler-29d1~v7](https://www.flux.ai/ka000/12v-tec-phone-cooler-29d1~v7)*