Product overview
Description
The EVLSTCH03-36W-SR shown in the image here is a 36 W wide-range mains USB charger demonstration board, with selectable output voltage (5 - 9 - 12 V @ 3 A output current), based on the STCH03L and SRK1000B.
The power circuit is a quasi-resonant (QR) flyback converter, with peak current mode control, based on the STCH03L IC. The circuit operates with secondary side constant voltage (CV) regulation through an optocoupler and is capable of providing constant output current (CC) regulation using primary sensing feedback.
The STCH03L embeds a 650 V, non-dissipative, HV startup cell, which, along with the extremely low quiescent current and burst-mode management, helps minimize residual input consumption, thus achieving less than 20 mW under no-load condition.
At secondary side, the SRK1000B controller implements synchronous rectification to increase system efficiency: it controls the synchronous rectifier MOSFET, driving its gate with minimal turn-on delay and maximizing the turn-off time instant (through an adaptive mechanism) so that the residual conduction of the SR MOSFET body diode after turn-off reduces to the target value of 300 ns.
The charger is designed to meet the most stringent energy saving recommendations (Eu CoC rev. 5 - Tier 2 and EPS of DOE USA) as well as EMI regulation EN55022-Class-B for line conducted noise emissions.
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All features
- Universal AC mains input voltage range: 90 V to 264 V
- Output voltage: 5 - 9 - 12 V selectable @3 A continuous operation
- Constant voltage (CV) regulation with optocoupler and constant current (CC) regulation with primary side sensing
- No-load consumption < 20mW at 230 VAC (with load disconnected from charger)
- 4 points average efficiency and 10% load efficiency in compliance with Eu CoC rev. 5 - Tier 2 (2016)
- Line conducted EMI in compliance with EN55022 - Class B
- Small form factor (73 x 55 x 15 mm)
- RoHS compliant
All resources
| Resource title | Version | Latest update |
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Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| ZIP | 1.0 | 08 May 2019 | 08 May 2019 |
Bill of Materials (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 08 May 2019 | 08 May 2019 |
Schematic Pack (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 08 May 2019 | 08 May 2019 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | WEEE Compliant | Material Declaration** |
|---|---|---|---|---|---|---|
| EVLSTCH03-36W-SR | Active | CARD | Industrial | Ecopack1 | - | |
EVLSTCH03-36W-SR
Package:
CARDMaterial 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Supplier | Core Product | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EVLSTCH03-36W-SR | | | distributors No availability of distributors reported, please contact our sales office |
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EVLSTCH03-36W-SR Active
(*) 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