# Pixel 7 USB-C Battery Emulator ## Description Low-profile USB-C VBUS-powered battery emulator for a Google Pixel 7, reusing the original battery BMS/flex. Targets 4.5–21 V input, full-performance transient support, no lithium cell, and a 46 × 80 × 5 mm maximum envelope. ## Project Details - **Owner:** waldobert - **Created:** 7/28/2026 - **Last Updated:** 7/30/2026 - **Visibility:** Public ## Key Components ### D1 — [SMBJ24A](https://www.flux.ai/cherepanyadima/smbj24a~2b.md) - Manufacturer Name: Taiwan Semiconductor Corporation - Manufacturer Part Number: SMBJ24A-TR - Datasheet URL: https://services.taiwansemi.com/storage/resources/datasheet/SMBJ%20SERIES_R2104.pdf - Role: Clamping - Part Type: TVS - Role Details: 24V VRWM; 26.7-29.5V breakdown; 38.9V max clamp at 16A, below 60V eFuse/LM5176/MOSFET ratings **Pins:** - A [pin 2] - K [pin 1] ### D2 — [BAT54H,115](https://www.flux.ai/jecstronic/bat54hc115~nbk.md) - Role: Bootstrap Diode - Manufacturer Part Number: BAT54H,115 - Role Details: U2 VCC to bootstrap charging path - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAT54H.pdf - Manufacturer Name: Nexperia USA Inc. - Part Type: Diode **Pins:** - A [pin 2] - K [pin 1] ### D3 — [BAT54H,115](https://www.flux.ai/jecstronic/bat54hc115~nbk.md) - Role: Bootstrap Diode - Part Type: Diode - Role Details: U2 VCC to bootstrap charging path - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/BAT54H.pdf - Manufacturer Name: Nexperia USA Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BAT54H,115 **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [NCEP0178AK](https://www.flux.ai/lcsc/ncep0178ak~yy56.md) - Drain to Source Voltage: 100V - Continuous Drain Current: 78A - Product Info Url: https://lcsc.com/product-detail/MOSFET_Wuxi-NCE-Power-Semiconductor-NCEP0178AK_C216784.html - Part Type: MOSFETs - Power: 125W - Role: Reverse Polarity Protection - Operating Temperature: -55℃~+175℃ - LCSC Part Number: C216784 - Manufacturer Name: NCE(无锡新洁能) - Role Details: NCEP0178AK 100V TO-252/DPAK external blocking FET; 8.5mOhm max at 10V, -55C to 175C, 2.4mm max height. - Package or Case Code: TO-252-2_L6.5-W6.1-P4.58-LS10.0-TL - Manufacturer Part Number: NCEP0178AK - Transistor Type: 1 N-channel - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810010234_Wuxi-NCE-Power-Semiconductor-NCEP0178AK_C216784.pdf **Pins:** - D [pin 4] - G [pin 1] - S [pin 3] ### Q2 — [AONS66614](https://www.flux.ai/silicon-yard/aons66614.md) - Manufacturer Name: Alpha & Omega Semiconductors - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/f2e0549afe9256ed3eab48b978f4fa3ab878187ce47c6265f947c8a09c109045.pdf - Manufacturer Part Number: AONS66614 - Symbol Style: parametric-v1 - Role: Power MOSFET - Role Details: 60V synchronous buck-boost switch, 2.9mOhm max at 10V - Package or Case Code: 8-DFN (5x6) **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q3 — [AONS66614](https://www.flux.ai/silicon-yard/aons66614.md) - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductors - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AONS66614 - Role Details: 60V synchronous buck-boost switch, 2.9mOhm max at 10V - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/f2e0549afe9256ed3eab48b978f4fa3ab878187ce47c6265f947c8a09c109045.pdf - Symbol Style: parametric-v1 - Role: Power MOSFET - Package or Case Code: 8-DFN (5x6) **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q4 — [AONS66614](https://www.flux.ai/silicon-yard/aons66614.md) - Symbol Style: parametric-v1 - Role: Power MOSFET - Package or Case Code: 8-DFN (5x6) - Manufacturer Name: Alpha & Omega Semiconductors - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/f2e0549afe9256ed3eab48b978f4fa3ab878187ce47c6265f947c8a09c109045.pdf - Manufacturer Part Number: AONS66614 - Role Details: 60V synchronous buck-boost switch, 2.9mOhm max at 10V **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q5 — [AONS66614](https://www.flux.ai/silicon-yard/aons66614.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/f2e0549afe9256ed3eab48b978f4fa3ab878187ce47c6265f947c8a09c109045.pdf - Role: Power MOSFET - Role Details: 60V synchronous buck-boost switch, 2.9mOhm max at 10V - Manufacturer Part Number: AONS66614 - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductors - Package or Case Code: 8-DFN (5x6) - Symbol Style: parametric-v1 **Pins:** - D_1 [pin 5] - D_2 [pin 6] - D_3 [pin 7] - D_4 [pin 8] - D_5 [pin 9] - G [pin 4] - S_1 [pin 1] - S_2 [pin 2] - S_3 [pin 3] ### Q6 — [BSS138](https://www.flux.ai/vasy_skral/bss138~3ld.md) - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Role: Switching - Manufacturer Part Number: BSS138 - Part Type: Transistor - Role Details: TPS26630 DRV-controlled fast pulldown for external blocking FET; 50V, low-Ciss SOT-23 **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q7 — [AOD508](https://www.flux.ai/adrian95/aod508~28.md) - Manufacturer Part Number: AOD508 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Reverse Current Blocking MOSFET - Part Type: Transistor - Datasheet URL: https://aosmd.com/res/data_sheets/AOD508.pdf - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: AOD508 TO-252/DPAK, 30V, 4.5mOhm max at VGS=4.5V; 2.29mm max height; sized for 6A continuous and 8A transient with PCB copper. **Pins:** - D [pin 3] - G [pin 1] - S [pin 4] ### Q8 — [NCE6080K](https://www.flux.ai/lcsc/nce6080k~cnku.md) - Operating Temperature: -55℃~+175℃ - Manufacturer Name: NCE(无锡新洁能) - Part Type: MOSFETs - Package or Case Code: TO-252-2_L6.6-W6.1-P4.57-LS10.1-BR-CW - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_Wuxi-NCE-Power-Semiconductor-NCE6080K_C341705.pdf - Transistor Type: 1 N-channel - Role Details: NCE6080K 60V TO-252/DPAK dump MOSFET; 8.5mOhm max at 10V, pulse/intermittent operation, 2.4mm max height. - JLCPCB Part Class: Extended Part - Role: Overvoltage Dump Switch - Product Info Url: https://lcsc.com/product-detail/Others_Wuxi-NCE-Power-Semiconductor-NCE6080K_C341705.html - LCSC Part Number: C341705 - Power: 110W - Drain to Source Voltage: 60V - Manufacturer Part Number: NCE6080K - Continuous Drain Current: 80A **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### TP1 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role: VBUS Direct Solder Pad - Role Details: Phone USB-C assembly VBUS direct wire landing; PCB solder pad only, no connector; enlarged low-profile exposed copper pad, target ~4mm landing - Testpoint Size: 4mm - Part Type: Test Point **Pins:** - P1 [pin 1] ### TP2 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 4mm - Role: GND Direct Solder Pad - Role Details: Phone USB-C assembly GND direct wire landing; PCB solder pad only, no connector; enlarged low-profile exposed copper pad, target ~4mm landing - Part Type: Test Point **Pins:** - P1 [pin 1] ### TP3 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 4mm - Role: BMS Cell+ Direct Solder Pad - Part Type: Test Point - Role Details: Original battery BMS/flex exposed cell-positive pad landing; PCB solder pad only, no connector; enlarged low-profile high-current copper pad **Pins:** - P1 [pin 1] ### TP4 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 4mm - Role Details: Original battery BMS/flex exposed cell-negative pad landing; PCB solder pad only, no connector; enlarged low-profile high-current copper pad - Role: BMS Cell- Direct Solder Pad - Part Type: Test Point **Pins:** - P1 [pin 1] ### U1 — [TPS26630RGE](https://www.flux.ai/kicad-part-library/tps26630rge~yk.md) - Role: Protection - Manufacturer Part Number: TPS26630RGE - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps2663.pdf - Package or Case Code: Texas_RGE0024H_VQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias - Role Details: 60V eFuse; 2.77A nominal / <=3.0A max programmed input limit; 4.50V UVLO and 23.45V OVP; coordinated with 24V TVS and 100V blocking FET - Manufacturer Name: Texas Instruments Inc. **Pins:** - ~{FLT} [pin 14] - ~{SHDN} [pin 12] - B_GATE [pin 3] - DRV [pin 4] - dVdT [pin 9] - GND [pin 25] - GND [pin 8] - ILIM [pin 10] - IMON [pin 13] - IN [pin 1] - IN [pin 2] - IN_SYS [pin 5] - MODE [pin 11] - NC [pin 19] - NC [pin 21] - NC [pin 22] - NC [pin 23] - NC [pin 20] - NC [pin 24] - OUT [pin 18] - OUT [pin 17] - OVP [pin 7] - PGOOD [pin 16] - PGTH [pin 15] - UVLO [pin 6] ### U2 — [LM5176PWPR](https://www.flux.ai/lcsc/lm5176pwpr~io2d.md) - Package or Case Code: HTSSOP-28_L9.7-W4.4-P0.65-LS6.4-BL-EP - JLCPCB Part Class: Extended Part - LCSC Part Number: C442493 - Part Type: DC-DC Controllers - Role: Buck-Boost Controller - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm5176.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1780518066850&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Flm5176 - Role Details: 4.5-21V to 4.15V, 5A continuous target, 300kHz - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: LM5176PWPR - Symbol Style: parametric-v1 **Pins:** - AGND [pin 10] - BIAS [pin 24] - BOOT1 [pin 26] - BOOT2 [pin 20] - COMP [pin 9] - CS [pin 16] - CSG [pin 15] - DITH [pin 5] - EN/UVLO [pin 1] - EP [pin 29] - FB [pin 11] - HDRV1 [pin 27] - HDRV2 [pin 19] - ISNS(-) [pin 13] - ISNS(+) [pin 14] - LDRV1 [pin 25] - LDRV2 [pin 21] - MODE [pin 4] - PGND [pin 22] - PGOOD [pin 17] - RT [pin 6] - SLOPE [pin 7] - SS [pin 8] - SW1 [pin 28] - SW2 [pin 18] - VCC [pin 23] - VIN [pin 2] - VISNS [pin 3] - VOSNS [pin 12] ### U3 — [LTC4359HS8#PBF](https://www.flux.ai/lcsc/ltc4359hs8pbf~e1ks.md) - Package or Case Code: SO-8_L4.9-W3.9-P1.27-LS6.0-BL - LCSC Part Number: C1523986 - Part Type: Monitors & Reset Circuits - Role Details: LTC4359HS8 SO-8, -40C to 125C; preserves ideal-diode control and 300ns-class reverse turnoff. - Role: Reverse Current Blocking Controller - Manufacturer Name: ADI(亚德诺) - Manufacturer Part Number: LTC4359HS8#PBF - JLCPCB Part Class: Extended Part **Pins:** - ~{SHDN} [pin 5] - GATE [pin 1] - IN [pin 4] - NC [pin 3] - NC [pin 7] - OUT [pin 8] - SOURCE [pin 2] - VSS [pin 6] ### U4 — [TLV3012AIDBVT](https://www.flux.ai/lcsc/tlv3012aidbvt~q2v6.md) - Manufacturer Name: TI(德州仪器) - Role Details: Integrated 1.242V reference; push-pull output enables dump MOSFET above approximately 4.48V nominal - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TLV3012AIDBVT - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - LCSC Part Number: C2863635 - Role: Overvoltage Comparator - Part Type: Comparators **Pins:** - IN- [pin 4] - IN+ [pin 3] - OUT [pin 1] - REF [pin 5] - V- [pin 2] - V+ [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/waldobert/pixel-7-usb-c-battery-emulator~jr](https://www.flux.ai/waldobert/pixel-7-usb-c-battery-emulator~jr).* --- *Generated from [https://www.flux.ai/waldobert/pixel-7-usb-c-battery-emulator~jr](https://www.flux.ai/waldobert/pixel-7-usb-c-battery-emulator~jr)*