How many possibilities can one chip unlock?

Bieland’s latest D9812 “one-chip, triple-output” wireless charging controller IC gives a pleasantly surprising answer. Based on this fully synchronous digital demodulation transmitter controller IC, we have developed four reference designs with different configurations—from desktop dual MPP fast charging to magnetic single-device charging with cooling—covering today’s most mainstream wireless charging application scenarios.

Which one is best suited for your product? Let’s take a look.

1. D9812 IC: Why Can One Chip Deliver “One-Chip, Triple-Output”?

Before introducing the four designs, let’s take a quick look at the core capabilities of this IC:

• Compatible with the WPC Qi2.2 standard, supporting MPP + BPP/EPP protocols
• Core frequency 100MHz, PWM up to 200MHz
• Supports PD3.0 (PPS)/QC3.0 and other fast-charging protocols
• Fully synchronous digital demodulation with proprietary Wave-Monitor technology for reliable communication
• Optimized EMC and noise performance, adjustable drive speed
• Cycle-by-Cycle hardware-level OCP protection for worry-free safety
• Abundant memory and hardware resources to meet customization requirements such as LED/OLED/TFT-LCD displays
• Supports USB in-system firmware upgrades, no dedicated programmer required

It is this underlying strength that enables the D9812 to drive three wireless charging channels simultaneously with a single chip and flexibly adapt to various product form factors.

2. Four Reference Designs Based on the D9812

Design 1: 25W 3-in-1 Wireless Charger (Phone + Earbuds + Watch)

IC Combination: D9812 + D9015A + D9002 + D9002

Configuration:

• Phone: 25W wireless charging
• Earbuds: 5W wireless charging
• Watch: 3W wireless charging

Highlights: A classic 3-in-1 configuration, suitable for desktop or bedside use. One chip handles the charging needs of a phone, earbuds, and watch—simple and efficient.

Use Cases: Home nightstands, office desks, hotel rooms, and other places where multiple devices need to be charged simultaneously.

Design 2: Dual MPP 25W 4-in-1 Wireless Charger (Dual Phones + Earbuds + Wired Fast Charging)

IC Combination: D9812 + D9022 + D9022 + D9008C

Configuration:

• Phone Position 1: 25W MPP magnetic fast charging
• Phone Position 2: 25W MPP magnetic fast charging
• Earbuds: 5W wireless charging
• Wired Fast Charging: One PDO wired output
• LCD Display: Real-time charging power display for each coil

Highlights: Ideal for dual-person office or family sharing scenarios. Two phones can be placed simultaneously, both supporting 25W magnetic fast charging. With an additional earbuds position and wired output, it can serve up to four devices at the same time. The LCD screen makes charging status clear at a glance.

Use Cases: Dual-person workstations, family shared charging stations, meeting rooms, and business reception desks.

Design 3: MPP 25W 4-in-1 Wireless Charger (Phone + Earbuds + Watch + Wired Fast Charging)

IC Combination: D9812 + D9022 + D9022 + D9008C

Configuration:

• Phone: 25W MPP magnetic fast charging
• Earbuds: 5W wireless charging
• Watch: 3W wireless charging
• Wired Fast Charging: One PDO wired output
• LCD Display: Real-time charging power display

Highlights: Shares the same IC combination as Design 2, but with a different coil layout. It focuses on the three core devices—phone, earbuds, and watch—with an additional wired output and display, suitable for premium desktop charging docks pursuing multifunctional integration.

Use Cases: Smart home control consoles, premium office desks, and boutique hotel nightstands.

Design 4: 25W Magnetic Wireless Charger (Phone Fast Charging)

IC Combination: D9812 + D9015A

Configuration:

• Phone: 25W wireless fast charging
• Active Cooling: Fan + thermoelectric cooling

Highlights: Designed specifically for gaming phones, in-car travel, or high-power scenarios. 25W wireless fast charging generates considerable heat; an active cooling solution can effectively reduce the temperature of the charging pad and phone, ensuring charging efficiency does not drop due to temperature rise.

Use Cases: Gaming phone charging stands, in-car air vent magnetic mounts, long-duration high-power charging scenarios, and temperature-sensitive premium charging devices.

3. Conclusion

All four reference designs are based on the same D9812 IC. You can directly refer to our solutions for rapid mass production, or perform deep customization based on the IC—PCB dimensions, coil layout, display style, and charging logic can all be adjusted as needed.

• Get the IC Design Package
• Request Samples
• Custom Solution Development

Contact us for more information.