RP2040 + W25Q16JV
Wii Portable Power Management Board
Overview
A custom all-in-one power and management board for a handheld Nintendo Wii, featuring 2S Li-ion charging, synchronous step-down regulators, an MCU-based state machine, OLED telemetry, and isolated audio.
Matei Nectarie VarlamSystem architecture
POWER
SENSOR
MCU
DISPLAY
AUDIO
- USB_C_CHARGER → BMS_PROTECTIONPowerCharging current passes through BMS protection to 2S battery pack
- BMS_PROTECTION → BUCK_1V0_1V15Power7.4V battery input to step-down regulators
- FUEL_GAUGE → RP2040_MCUI2CBattery state-of-charge telemetry reporting
- RP2040_MCU → OLED_DISPLAYI2CPre-boot menu graphics and telemetry display
- RP2040_MCU → BUCK_1V0_1V15GPIOPower state machine sequencing and rail enable signals
- AUDIO_DAC → AUDIO_AMPPowerIsolated analog audio signal feeding Class-D amplifier
Bill of materials
| Part number | Type | Component | Manufacturer | Package | Qty | Datasheet | Match |
|---|---|---|---|---|---|---|---|
| BQ25606RGER | POWER | BQ25606 High-efficiency 2S synchronous switch-mode charger with USB-C input | Texas Instruments | 24-VFQFN Exposed Pad | 1 | Matched | |
2 alternatives consideredAI verified | |||||||
| XB7608A | POWER | XB7608A Dual-cell Li-ion protection IC for overcharge, over-discharge, and short-circuit | xysemi | CPC-5 | 1 | Matched | |
| MAX17043X+ | SENSOR | MAX17043 Precision fuel gauge IC tracking State-of-Charge (SoC) via ModelGauge algorithm | Maxim Integrated Products, Inc. | 9-WFBGA, WLBGA | 1 | Matched | |
3 alternatives consideredAI verified | |||||||
| MP2143DJ | POWER | TPS62840 / MP2143 Generates tight-tolerance 1.0V and 1.15V core rails for Hollywood/Broadway | Monolithic Power Systems, Inc. | — | 2 | Matched | |
1 alternatives consideredAI verified | |||||||
| TPS62130A | POWER | TPS62130 Generates 1.8V and 3.3V auxiliary and peripheral power rails | Texas Instruments | — | 2 | Matched | |
1 alternatives consideredAI verified | |||||||
| TPS62130A | POWER | TPS62130A Generates clean 5.0V system rail for display backlight, USB, and audio | Texas Instruments | — | 1 | Matched | |
1 alternatives consideredAI verified | |||||||
| W25Q16 | MCU | RP2040 + W25Q16JV Power state machine, sequencing, OLED UI handler, and telemetry streaming | WINBOND | SOP | 1 | Matched | |
| SSD1306-220MT | DISPLAY | SSD1306 0.96 inch OLED Displays pre-boot menu, battery status, temperature, and power telemetry | Shenzhen Lantu Micro Electric Technology Co., Ltd. | SMD, 18.54x15.24mm | 1 | Matched | |
3 alternatives consideredAI verified | |||||||
| PCM5102A | AUDIO | PCM5102A Converts I2S digital audio from the Wii into high-fidelity analog signals | Texas Instruments | Tube Alternate Packaging | 1 | Matched | |
1 alternatives consideredAI verified | |||||||
| TPA3110D2 | AUDIO | TPA3110D2 Drives portable speakers with filtered Class-D amplification | Texas Instruments | HSOP28 | 1 | Matched | |
Build guide
6-8 hoursAdvanced
1
Procurement & Preparation
- Source all active components including BQ25606RGER charger, XB7608A protection IC, MAX17043X+ fuel gauge, MP2143DJ, TPS62130A regulators, RP2040, W25Q16 flash, SSD1306 OLED, PCM5102A DAC, and TPA3110D2 amplifier.
- Inspect the custom 4-layer Wii Portable Power Management Board bare PCB for manufacturing defects, short circuits across power planes, and correct silkscreen markings.
- Prepare stencil, lead-free SAC305 solder paste, and organize surface-mount components on ESD-safe trays.
2
Hardware Assembly & Wiring
- Align the solder stencil over the PCB pads, apply SAC305 solder paste evenly across all footprints, and inspect paste deposition.
- Place all surface-mount ICs (BQ25606RGER, XB7608A, MAX17043X+, MP2143DJ regulators, TPS62130A regulators, RP2040, W25Q16 flash, PCM5102A, TPA3110D2) and passive components onto their respective pads using precision tweezers.
- Run the populated PCB through a reflow oven using a standard lead-free temperature profile (peak temp 245°C). Allow the board to cool down naturally.
- Manually solder the SSD1306 0.96 inch OLED display module, USB-C input connector, battery leads for the 2S Li-ion pack, and audio/power output wire harnesses.
3
Firmware Setup
- Connect the RP2040 MCU debug interface (SWD/USB) to a development PC and initialize the build environment for the power state machine and telemetry firmware.
- Compile and flash the custom firmware (including I2C routines for MAX17043 fuel gauge telemetry, SSD1306 OLED UI rendering, and GPIO power sequencing for MP2143 / TPS62130 regulators) onto the RP2040 and W25Q16 flash.
4
Testing & Calibration
- Perform initial power-up test using a controlled bench power supply set to 7.4V (simulating a 2S Li-ion pack). Measure quiescent current and verify output rails (1.0V, 1.15V, 1.8V, 3.3V, 5.0V).
- Verify USB-C charging functionality via the BQ25606 charger IC and XB7608A protection circuit. Monitor charge current, battery voltage, and thermal behavior under load.
- Test I2C telemetry communication between the MAX17043 fuel gauge and RP2040, confirming accurate State-of-Charge (SoC) percentages rendered on the SSD1306 OLED pre-boot menu.
- Validate the isolated audio subsystem by streaming test audio through the PCM5102A DAC into the TPA3110D2 Class-D amplifier. Check for clean output and absence of ground loops or digital noise.
Document
Wii Portable Power Management Board
A custom all-in-one power and management board for a handheld Nintendo Wii, featuring 2S Li-ion charging, synchronous step-down regulators, an MCU-based state machine, OLED telemetry, and isolated audio.
Design Overview
| Item | Details |
|---|---|
| Product Type | Wii Portable Power Management Board |
| Key Functions | 7.4V 2S Li-ion battery charging and BMS protection with fuel gauge, Synchronous step-down power rails (1.0V, 1.15V, 1.8V, 3.3V, 5.0V), RP2040/ESP32 MCU for power state machine and telemetry, Monochrome OLED display and power button pre-boot menu, Class-D audio amplifier and I2S DAC with isolated power planes |
| Power Source | 7.4V 2S Li-Ion Battery / USB-C |
| Connectivity | USB-C |
| Size | Under 80mm x 50mm stackable sandwich layout |
| Environment | handheld gaming device |
| Difficulty | Advanced |
| Est. Time | 6-8 hours |
System Architecture
Power Topology: USB-C input feeds BQ25606 charger and XB7608A BMS protection for 2S Li-ion battery pack. VBAT (7.4V nominal) distributes to synchronous step-down regulators generating 1.0V, 1.15V, 1.8V, 3.3V, and 5.0V rails. An isolated analog ground plane with ferrite beads powers the PCM5102A DAC and TPA3110D2 amplifier.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| USB_C_CHARGER | POWER | BQ25606 | High-efficiency 2S synchronous switch-mode charger with USB-C input | 9V |
| BMS_PROTECTION | POWER | XB7608A | Dual-cell Li-ion protection IC for overcharge, over-discharge, and short-circuit | 7.4V |
| FUEL_GAUGE | SENSOR | MAX17043 | Precision fuel gauge IC tracking State-of-Charge (SoC) via ModelGauge algorithm | 3.3V |
| BUCK_1V0_1V15 | POWER | TPS62840 / MP2143 | Generates tight-tolerance 1.0V and 1.15V core rails for Hollywood/Broadway | 7.4V |
| BUCK_1V8_3V3 | POWER | TPS62130 | Generates 1.8V and 3.3V auxiliary and peripheral power rails | 7.4V |
| BUCK_5V0 | POWER | TPS62130A | Generates clean 5.0V system rail for display backlight, USB, and audio | 7.4V |
| RP2040_MCU | MCU | RP2040 + W25Q16JV | Power state machine, sequencing, OLED UI handler, and telemetry streaming | 3.3V |
| OLED_DISPLAY | DISPLAY | SSD1306 0.96 inch OLED | Displays pre-boot menu, battery status, temperature, and power telemetry | 3.3V |
| AUDIO_DAC | AUDIO | PCM5102A | Converts I2S digital audio from the Wii into high-fidelity analog signals | 3.3V |
| AUDIO_AMP | AUDIO | TPA3110D2 | Drives portable speakers with filtered Class-D amplification | 5V |
Design Schemes
RP2040 Integrated Power Management & Isolated Audio Scheme ★
Features an onboard RP2040 controlling synchronous step-down rails (1.0V, 1.15V, 1.8V, 3.3V, 5.0V), 2S USB-C charging with fuel gauge, OLED menu, and isolated I2S audio.
Trade-offs: Highest integration and best telemetry/OLED control, slightly more complex layout required for audio isolation.
Key IC selection
2S Synchronous Switch-Mode Charger
- Need: Fast and safe charging for a 7.4V 2S Li-ion battery pack from a 5V/9V USB-C input source with thermal regulation.
- Class: Switch-mode 2-cell Li-ion battery charger IC
- Shortlist: TI BQ25606, MPS MP2656
- Pick: Select based on input voltage range, switching frequency, I2C programmability, and available package footprint in BOM.
Power State Machine and UI Controller
- Need: Multi-channel GPIO control for power rail sequencing, I2C/SPI interfaces for telemetry and OLED UI, and low power consumption.
- Class: Dual-core ARM Cortex-M0+ microcontroller with integrated flash support
- Shortlist: Raspberry Pi RP2040 + W25Q16JV, STM32G030F6P6
- Pick: Select based on peripheral availability (I2C/SPI), cost, package size, and developer ecosystem familiarity in BOM.
Core Voltage Regulator for Wii Hollywood/Broadway
- Need: Ultra-low ripple, high-efficiency step-down conversion to deliver tight-tolerance 1.0V and 1.15V rails under rapid load transients.
- Class: High-efficiency synchronous step-down DC-DC converter
- Shortlist: TI TPS62840, MPS MP2143
- Pick: Select based on output current rating, transient response performance, quiescent current, and inductor footprint constraints.
Risk register
| ID | Area | Severity | Detail | Mitigation |
|---|---|---|---|---|
| r1 | emi | high | High-frequency switching noise from multiple synchronous buck converters (TPS62130, TPS62840) and Class-D audio amplifier (TPA3110D2) can couple into the sensitive I2S audio DAC and Wii core power rails. | Ensure strict ground plane separation between analog audio and digital/power planes, keep switching loops extremely tight, and place Pi-filters on the 5.0V audio supply rail. |
| r2 | thermal | med | Thermal dissipation in a compact portable chassis from the 2S charging IC (BQ25606) and Class-D amplifier (TPA3110D2) during high-load simultaneous charging and gaming. | Include adequate thermal vias under the charger and amplifier IC pads connecting to internal ground copper planes to act as a heat spreader. |
| r3 | firmware | high | Incorrect power-up or power-down sequencing between the 1.0V/1.15V core rails and the 1.8V/3.3V auxiliary rails can cause latch-up or permanent hardware damage to the Wii Hollywood/Broadway chips. | Implement a rigorous, hardware-verified state machine inside the RP2040 firmware with strict timing delays between rail enables monitored via power-good feedback pins. |
Key Components
10/10 modules matched to real parts. See the BOM tab for the full component table.
BQ25606 (BQ25606RGER)
Candidate 2 (BQ25606RGER) matches the primary MPN BQ25606 and is manufactured by Texas Instruments (the original manufac
XB7608A (XB7608A)
The candidate matches the primary MPN XB7608A for a dual-cell Li-ion protection IC.
TPS62840 / MP2143 (MP2143DJ)
Candidate 2 (MP2143DJ) matches the primary MPN with a standard ordering suffix (DJ) and has the correct manufacturer (Mo
TPS62130 (TPS62130A)
Candidate 2 is manufactured by Texas Instruments and its MPN (TPS62130A) matches the primary MPN with an ordering suffix
TPS62130A (TPS62130A)
Exact match for primary MPN TPS62130A and correct manufacturer Texas Instruments.
RP2040 + W25Q16JV (W25Q16)
The candidate W25Q16 matches the primary MPN W25Q16JV (Winbond flash memory IC) required for the module.
Build Summary
- Difficulty: Advanced
- Estimated time: 6-8 hours
- Tools required: Digital Multimeter, Reflow Oven, Stereo Microscope, Soldering Iron, DC Bench Power Supply, Oscilloscope
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Custom All-In-One Wii Portable Power & Management Board for a handheld Nintendo Wii (OMGWTF-trimmed motherboard). Features: 7.4V 2S Li-ion battery pack, USB-C charging & 2S BMS protection, synchronous step-down regulators for 1.0V (CPU), 1.15V (GPU), 1.8V, 3.3V, 5.0V, RP2040/ESP32 MCU for power state machine and telemetry, monochrome OLED display, power button / pre-boot menu, Class-D audio amplifier/I2S DAC with isolated power planes. JLCPCB SMT compatible.