# wireless power bank ## Description 4×4 cm USB-C PD & Qi Wireless Power Bank with Li-Po Charging, Power-Path Management, 3.3 V LDO, Full-Bridge Gate Driver, LED Resistors, and Corrected 5 V Output Feedback (Schematic Cleaned: Redundant Net Portals/Passives Removed, Fuel-Gauge LED Channels Verified, ERC/DRC Issues Resolved) ## Project Details - **Owner:** zuhour - **Created:** 1/26/2026 - **Last Updated:** 1/27/2026 - **Visibility:** Public - **decoupling_nets:** 5V, GND, CC2, CC1, BAT, TS, VBUS - **active_rating_violations:** U4 - **Domain:** Consumer Electronics - **erc_issues:** [] - **System Architecture:** ```mermaid flowchart TD USB_C[USB-C Input] CC[CC Resistors] PD[PD Controller] EFUSE[eFuse/OVP] CHG[Charger IC] BAT[LiPo Battery] BOOST[Boost Converter] QI[Qi TX Module] MCU[Fuel Gauge MCU] NTC[NTC Thermistor] LED[LED Indicator] USB_C --> CC CC --> PD PD --> EFUSE EFUSE --> CHG CHG --> BAT BAT --> CHG CHG --> BOOST BOOST --> QI CHG --> NTC CHG --> MCU MCU --> LED ``` - **pending_changes:** Add 3.3 V LDO for U4; Add MOSFET gate driver full-bridge for U4; Add LED series resistors; Adjust TPS61023 FB network - **Connectivity:** USB - **Power Requirements:** USB - **Power Source:** Battery - **Manufacturing Quantity Target:** 10 - **drc_issues:** [] - **missing_footprints_non_generic:** [] ## Key Components ### D1 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: Fuel gauge indicator LED driven by MAX17263xxTE L1 output - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### D2 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Part Type: LED - Role Details: Fuel gauge indicator LED driven by MAX17263xxTE L2 output **Pins:** - A [pin 2] - K [pin 1] ### D3 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: Fuel gauge indicator LED driven by MAX17263xxTE L3 output - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### D4 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: Fuel gauge indicator LED driven by MAX17263xxTE L4 output - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [TPS25751SRSMR](https://www.flux.ai/3xalted0n3/tps25751srsmr~zv.md) - Manufacturer Part Number: TPS25751SRSMR - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps25751.pdf - Manufacturer Name: Texas Instruments - Package or Case Code: QFN40P400X400X100-33N-D **Pins:** - ~{I2CC_IRQ} [pin 17] - ~{I2CT_IRQ} [pin 10] - ADCIN1 [pin 2] - ADCIN2 [pin 3] - CC1 [pin 24] - CC2 [pin 25] - GATE_VBUS [pin 21] - GATE_VSYS [pin 20] - GND_1 [pin 11] - GND_2 [pin 12] - GND_3 [pin 14] - GND_4 [pin 33] - GPIO0 [pin 5] - GPIO1 [pin 6] - GPIO11 [pin 13] - GPIO2 [pin 7] - GPIO3 [pin 18] - GPIO4/USB_P/LD1 [pin 22] - GPIO5/USB_N/LD2 [pin 23] - GPIO6 [pin 31] - GPIO7 [pin 30] - I2CC_SCL [pin 16] - I2CC_SDA [pin 15] - I2CT_SCL [pin 9] - I2CT_SDA [pin 8] - LDO_1V5 [pin 4] - LDO_3V3 [pin 1] - PP5V_1 [pin 28] - PP5V_2 [pin 29] - VBUS_1 [pin 26] - VBUS_2 [pin 27] - VIN_3V3 [pin 32] - VSYS [pin 19] ### J1 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - Manufacturer Part Number: 2024100002 - Role Details: USB-C PD input connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf - Manufacturer Name: Molex - Role: Connector - Part Type: Connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### LED1 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric~sr7.md) - Role Details: Fuel gauge indicator LED driven by MAX17263xxTE L3 output - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [CSD17302Q5A](https://www.flux.ai/lcsc/csd17302q5a~bd6r.md) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010202_Texas-Instruments-CSD17302Q5A_C553151.pdf - Role Details: Full-bridge MOSFET switches for Qi power transmitter - Role: Power Switching - LCSC Part Number: C553151 - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: CSD17302Q5A - Part Type: MOSFETs - Package or Case Code: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Package: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Product Info Url: https://lcsc.com/product-detail/MOSFET_Texas-Instruments-Texas-Instruments-CSD17302Q5A_C553151.html **Pins:** - D [pin 5] - D [pin 6] - D [pin 8] - D [pin 7] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q2 — [CSD17302Q5A](https://www.flux.ai/lcsc/csd17302q5a~bd6r.md) - LCSC Part Number: C553151 - JLCPCB Part Class: Extended Part - Package: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010202_Texas-Instruments-CSD17302Q5A_C553151.pdf - Product Info Url: https://lcsc.com/product-detail/MOSFET_Texas-Instruments-Texas-Instruments-CSD17302Q5A_C553151.html - Role Details: Full-bridge MOSFET switches for Qi power transmitter - Role: Power Switching - Manufacturer Part Number: CSD17302Q5A - Part Type: MOSFETs - Package or Case Code: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Manufacturer Name: TI(德州仪器) **Pins:** - D [pin 5] - D [pin 6] - D [pin 8] - D [pin 7] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q3 — [CSD17302Q5A](https://www.flux.ai/lcsc/csd17302q5a~bd6r.md) - LCSC Part Number: C553151 - Role Details: Full-bridge MOSFET switches for Qi power transmitter - Role: Power Switching - Package: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010202_Texas-Instruments-CSD17302Q5A_C553151.pdf - Package or Case Code: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Part Type: MOSFETs - Manufacturer Part Number: CSD17302Q5A - Product Info Url: https://lcsc.com/product-detail/MOSFET_Texas-Instruments-Texas-Instruments-CSD17302Q5A_C553151.html - Manufacturer Name: TI(德州仪器) **Pins:** - D [pin 5] - D [pin 6] - D [pin 8] - D [pin 7] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q4 — [CSD17302Q5A](https://www.flux.ai/lcsc/csd17302q5a~bd6r.md) - Product Info Url: https://lcsc.com/product-detail/MOSFET_Texas-Instruments-Texas-Instruments-CSD17302Q5A_C553151.html - Manufacturer Part Number: CSD17302Q5A - Part Type: MOSFETs - Package or Case Code: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Package: DFN-8_L5.7-W4.9-P1.27-LS6.1-BL-1 - Manufacturer Name: TI(德州仪器) - LCSC Part Number: C553151 - Role Details: Full-bridge MOSFET switches for Qi power transmitter - Role: Power Switching - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010202_Texas-Instruments-CSD17302Q5A_C553151.pdf - JLCPCB Part Class: Extended Part **Pins:** - D [pin 5] - D [pin 6] - D [pin 8] - D [pin 7] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q5 — [STD2NM60T4-VB](https://www.flux.ai/jecstronic/std2nm60t4-vb~0e.md) - Manufacturer Part Number: STD2NM60T4-VB - Part Type: Mosfet - Manufacturer Name: VBsemi Elec - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304101800_VBsemi-Elec-STD2NM60T4-VB_C2680804.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Drain [pin 3] - Gate [pin 1] - Source [pin 2] ### U2 — [BQ25895RTW](https://www.flux.ai/kicad-part-library/bq25895rtw~88.md) - Manufacturer Part Number: BQ25895RTW - Manufacturer Name: Texas Instruments Inc. - Datasheet URL: http://www.ti.com/lit/ds/symlink/bq25895.pdf - Role: Power Conversion - abs_max_voltage_rating: 22V - Role Details: Single-cell Li-ion charger with power-path management and NTC input - Package or Case Code: Texas_RTW_WQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias **Pins:** - ~{CE} [pin 9] - ~{QON} [pin 12] - BAT [pin 13] - BAT [pin 14] - BTST [pin 21] - D- [pin 3] - D+ [pin 2] - DSEL [pin 24] - ILIM [pin 10] - INT [pin 7] - OTG [pin 8] - PGND [pin 18] - PGND [pin 17] - PGND [pin 25] - PMID [pin 23] - REGN [pin 22] - SCL [pin 5] - SDA [pin 6] - STAT [pin 4] - SW [pin 20] - SW [pin 19] - SYS [pin 15] - SYS [pin 16] - TS [pin 11] - VBUS [pin 1] ### U3 — [DW01A](https://www.flux.ai/kicad-part-library/dw01a~5d.md) - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: DW01A - Role Details: Li-ion battery protection IC, OVP, OCP, UVP, SCP - Package or Case Code: SOT-23-6 - Role: Protection - Datasheet URL: https://hmsemi.com/downfile/DW01A.PDF - abs_max_voltage_rating: 10V **Pins:** - CS [pin 2] - GND [pin 6] - OC [pin 3] - OD [pin 1] - TD [pin 4] - VCC [pin 5] ### U4 — [BQ500211ARGZT](https://www.flux.ai/jecstronic/bq500211argzt~0r2.md) - Part Type: Power Management - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq500211a.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Conversion - Manufacturer Part Number: BQ500211ARGZT - Role Details: Qi wireless power transmitter controller with integrated H-bridge - abs_max_voltage_rating: 3.6V - Manufacturer Name: Texas Instruments **Pins:** - *RESERVED [pin 31] - *RESET [pin 5] - AIN3 [pin 3] - AIN5 [pin 1] - AIN7 [pin 45] - BPCAP [pin 35] - BUZ_AC [pin 23] - BUZ_DC [pin 24] - COMM_A- [pin 38] - COMM_A+ [pin 37] - COMM_B- [pin 40] - COMM_B+ [pin 39] - DOUT_2B [pin 15] - DOUT_RX [pin 22] - DOUT_TX [pin 21] - DPWM_A [pin 12] - DPWM_B [pin 13] - EPAD [pin 49] - FOD [pin 17] - GND [pin 32] - GND [pin 47] - GND [pin 36] - I_SENSE [pin 42] - LED_MODE [pin 44] - LOPWR [pin 4] - LOSS_THR [pin 43] - MSP_CLK [pin 18] - MSP_MISO/LED_B [pin 8] - MSP_MOSI/LPWR_EN [pin 25] - MSP_RST/LED_A [pin 7] - MSP_SYNC [pin 14] - MSP_TDO/PROG [pin 26] - MSP_TEST [pin 9] - PMB_CLK [pin 10] - PMB_DATA [pin 11] - PMOD [pin 16] - RESERVED [pin 28] - RESERVED [pin 27] - RESERVED [pin 20] - RESERVED [pin 29] - RESERVED [pin 30] - RESERVED [pin 41] - RESERVED [pin 19] - RESERVED [pin 48] - SLEEP [pin 6] - T_SENSE [pin 2] - V_SENSE [pin 46] - V33A [pin 34] - V33D [pin 33] ### U5 — [MAX17263xxTE](https://www.flux.ai/kicad-part-library/max17263xxte~amv.md) - Manufacturer Part Number: MAX17263xxTE - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX17263.pdf - Role: Sensing (Shunt) - Manufacturer Name: Maxim Integrated Products, Inc. - abs_max_voltage_rating: 17V - Package or Case Code: DFN-14-1EP_3x3mm_P0.4mm_EP1.78x2.35mm - Role Details: Battery fuel gauge with integrated LED control **Pins:** - ALRT [pin 12] - BATT [pin 6] - CELLX/CSPH [pin 10] - CSN [pin 7] - CSPL [pin 9] - EP [pin 15] - GND [pin 8] - L1 [pin 2] - L2 [pin 3] - L3 [pin 4] - L4 [pin 5] - REG [pin 11] - SCL [pin 14] - SDA [pin 13] - TH [pin 1] ### U6 — [TPS61023DRLR](https://www.flux.ai/adrian95/tps61023drlr~z3.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps61023 - abs_max_voltage_rating: 9V - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Conversion - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Role Details: Boost converter for Qi TX module 5V rail - Manufacturer Part Number: TPS61023DRLR **Pins:** - EN [pin 2] - FB [pin 1] - GND [pin 4] - SW [pin 5] - VIN [pin 3] - VOUT [pin 6] ### U7 — [TLV70033DDCT](https://www.flux.ai/lcsc/tlv70033ddct~4522.md) - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Package or Case Code: SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR - Role Details: 3.3 V LDO regulator for Qi controller rail - Package: SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR - Role: Power Conversion - Manufacturer Part Number: TLV70033DDCT - LCSC Part Number: C2877582 - Part Type: Linear Voltage Regulators (LDO) **Pins:** - EN [pin 3] - GND [pin 2] - IN [pin 1] - N/C [pin 4] - OUT [pin 5] ### U8 — [IR2104SPBF](https://www.flux.ai/lcsc/ir2104spbf~hic2.md) - LCSC Part Number: C537543 - JLCPCB Part Class: Extended Part - Manufacturer Name: Infineon(英飞凌) - Part Type: Gate Drive ICs - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Role: Gate Driver - Product Info Url: https://lcsc.com/product-detail/MOS-Drivers_Infineon-Technologies-IR2104SPBF_C537543.html - Package or Case Code: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - Role Details: Full-bridge MOSFET gate driver for U4 - Package: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - Manufacturer Part Number: IR2104SPBF **Pins:** - ~{SD} [pin 3] - COM [pin 4] - HO [pin 7] - IN [pin 2] - LO [pin 5] - VB [pin 8] - VCC [pin 1] - VS [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/zuhour/wireless-power-bank~64](https://www.flux.ai/zuhour/wireless-power-bank~64).* --- *Generated from [https://www.flux.ai/zuhour/wireless-power-bank~64](https://www.flux.ai/zuhour/wireless-power-bank~64)*