Supported Models
- AP Ultra and S10 — up to 5W dynamic-decoding charging
- AP S7-S9 — up to 3.3W dynamic-decoding charging
- AP S1-S6 and SE — up to 2.5W dynamic-decoding charging
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Wireless Charging Solution Products
JX784 AP Watch 5W Fast Charging Solution
Model: JX784 / 9903B2 Authentication Chip
A compact AP watch fast-charging reference design supporting up to 5W dynamic decoding, a double-sided four-layer PCB and EMC-ready product development.
9903B2AP Watch 5W4-layer PCBEMC
Technical Solution Display
This page presents technical specifications, performance, compatibility and applications. It is not an online retail listing.
Solution Overview
Performance, Advantages, Compatibility & Applications
Performance
- Up to 5W AP watch fast charging
- 5.2 μH ±5% coil with Q factor ≥30
- Four-layer double-sided PCB
- Stable dynamic-decoding charging architecture
Advantages
- Stable and efficient charging without pop-up messages
- Three charging-power levels cover multiple AP watch generations
- Double-sided layout shows the complete front-and-back hardware design
- EMC-oriented product development support
Applications
- 5W single-watch fast chargers
- 2-in-1 and 3-in-1 charging stations
- Compact travel watch chargers
- Custom AP watch fast-charging accessories
Performance & Technical Features
- Supports AP Ultra and S10 at up to 5W with dynamic decoding
- Supports AP S7-S9 at up to 3.3W and AP S1-S6/SE at up to 2.5W
- Stable and efficient charging without pop-up messages
- Double-sided four-layer PCB architecture
- Hardware design can support EMC certification
Technical Specifications
| Authentication chip | 9903B2 |
|---|---|
| AP Ultra / S10 output | 5W max, dynamic decoding |
| AP S7-S9 output | 3.3W max, dynamic decoding |
| AP S1-S6 / SE output | 2.5W max, dynamic decoding |
| Coil inductance | 5.2 μH ±5% |
| Coil Q factor | ≥30 |
| Magnet grade | GS 3600 |
| Spacer height | 0.8-1.2 mm |
| PCB | 4 layers, double-sided, 0.8-1.0 mm thickness, immersion gold; inner 0.5 oz / outer 1 oz |
| Compliance support | EMC-ready hardware design |
Engineering Reference
JX784 Full Solution Sheet
Open the solution sheet in a new window to inspect every parameter at full size.
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