Product overview
Description
The STDES-50W2CWBC is a reference design that implements a Qi-compliant inductive wireless charger transmitter.
It supports two coils, which could work alternatively to increase the Rx positioning freedom.
The solution supports Qi EPP-compliant mode up to 15 W, featuring an ST proprietary protocol. It can also support 50 W or an even higher wireless power transfer.
The STDES-50W2CWBC is based on the STWBC2-HP high-integration, high-performance wireless charger system-on-chip.
It integrates: three pairs of half-bridge gate drivers, the dedicated DC-DC controllers that support buck, boost and buck-boost topologies, the high-performance Q-factor measurement hardware, the high-resolution main PWM controller, the dedicated Qi communication modulator and demodulator, the USB-PD controller, the buck DC-DC, and the charge pump.
It is suitable for one-coil and multicoil solutions in multiple topologies.
The STDES-50W2CWBC is a fully assembled reference design developed for performance evaluation only, not available for sale.
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All features
- Qi v1.2.4-compliant wireless charging transmitter reference design following MP-A2 topology
- Supports Qi EPP-compliant mode up to 15 W
- Supports up to 50 W with ST proprietary protocol (STSC)
- Supports two coils working alternatively for positioning freedom
- Supports USB-PD wall adapter input
- Boost DC-DC:
- Key products: STWBC2-HP wireless charging transmitter SoC, STL20N6F7 LV MOSFET
- Input: 4.1 to 24 V DC (from USB adapter)
- Maximum input current: 3 A
- Output: up to 38 V
- Boost DC-DC controlled by STWBC2-HP SoC to convert USB adapter input to the DC bridge voltage of the wireless charger LC tank
- Short DC-DC by P-MOS on the control of STWBC2-HP SoC for the best efficiency
- Main bridge:
- Key products: STWBC2-HP wireless charging transmitter SoC, STL20N6F7 LV MOSFET, STG719 analog switch
- Qi-compliant PID power control with frequency, duty-cycle, and voltage
- Switching frequency: 110 to 145 kHz
- ASK demodulation with voltage, current, and phase
- FSK modulation
- Protections for overvoltage, overcurrent, overtemperature, and undervoltage
- Q-factor estimation
- Auxiliaries:
- Key product: STWBC2-HP wireless charging transmitter SoC
- USB interface, embedded USB-PD stack
- Embedded buck DC-DC to convert 5 to 27 V input to 3.3 and 5 V supply voltages
- Embedded charge pump to double the voltage and support the embedded gate drivers
- Reserved I²C interface to upgrade to Qi v1.3 with an external secure MCU
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All resources
| Resource title | Version | Latest update |
|---|
Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| ZIP | 1.0 | 22 Mar 2022 | 22 Mar 2022 |
Bill of Materials (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 22 Mar 2022 | 22 Mar 2022 |
Schematic Pack (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 22 Mar 2022 | 22 Mar 2022 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | WEEE Compliant | Material Declaration** |
|---|---|---|---|---|---|---|
| STDES-50W2CWBC | Active | - | Industrial | - | Yes | |
STDES-50W2CWBC
Package:
-Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from distributors | Order from ST | Core Product | Marketing Status | Supplier | ECCN (US) | ECCN (EU) | Country of Origin | Board production status | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| STDES-50W2CWBC | distributors No availability of distributors reported, please contact our sales office | STWBC2-HP, STG719STR, STL20N6F7 | Active | ST | - | - | - | Not for sale | |
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors