Overview
The STCMB1TR from STMicroelectronics is a highly integrated power management IC designed for Transition Mode (TM) Power Factor Correction (PFC) and LLC resonant half-bridge converter applications. This device combines a high voltage double-ended controller, an 800V-rated high voltage section, and the necessary glue logic to supervise the operation of these blocks. It is packaged in a SO20W package, making it suitable for a variety of high-power applications.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Package | SO20W | - | - |
| High Voltage Start-Up | Voltage rating | 800 V | V |
| IC Supply Voltage | Operating range | 10 - 20 V | V |
| Turn-On Threshold | Voltage rising | 15.5 - 17.5 V | V |
| Turn-Off Threshold | Voltage falling | 9 - 10 V | V |
| Quiescent Current | After turn-on | 1.5 - 2.2 mA | mA |
| Junction Temperature | Operating range | -40 to 150 °C | °C |
| Storage Temperature | - | -55 to 150 °C | °C |
Key Features
- Enhanced Constant On-Time PFC: Uses a proprietary constant on-time control methodology without requiring a sinusoidal input reference, reducing system cost and external component count.
- Integrated Input Voltage Sensing: High voltage start-up with integrated input voltage sensing.
- Active Input Filter Capacitor Discharge: Compliant with IEC 62368-1 and UL Demko certified, reducing standby power.
- Complete Set of Protections: Includes ac brown-in/out, inrush control, OVP, OCP, inductor saturation, feedback disconnection, and more.
- LLC Controller Features: Proprietary timeshift control for improved input ripple rejection and dynamic response, half-bridge operation up to 750 kHz, and self-adjusting deadtime.
- Synchronous Burst Mode Operation: Enhances light-load efficiency by allowing both PFC and HB to work intermittently synchronized.
- Hard Switching Prevention (HSP): Prevents hard switching in the initial cycles and ensures soft-switching.
Applications
- Ac-dc Adapters and Open Frame SMPS: Suitable for high-power ac-dc adapters and open frame switch-mode power supplies.
- SMPs for LED TV, Desktop, and All-in-One PC: Compliant with energy efficiency standards such as EuP Lot 6, DOE, and European CoC ver. 5, Tier 2.
- Consumer and Industrial SMPS: Meets various regulatory requirements for consumer and industrial switch-mode power supplies.
- LED Street Lighting: Efficient and reliable solution for LED street lighting applications).
Q & A
- What is the package type of the STCMB1TR?
The STCMB1TR is packaged in a SO20W package).
- What is the high voltage start-up rating of the STCMB1TR?
The high voltage start-up rating is 800 V).
- What are the key features of the PFC controller in the STCMB1TR?
The PFC controller features enhanced constant on-time control, integrated input voltage sensing, and a complete set of protections including ac brown-in/out, inrush control, OVP, OCP, and more).
- How does the LLC controller in the STCMB1TR improve performance?
The LLC controller uses proprietary timeshift control for improved input ripple rejection and dynamic response, and operates up to 750 kHz with self-adjusting deadtime).
- What is the purpose of the hard switching prevention (HSP) function?
The HSP function prevents hard switching in the initial cycles and ensures soft-switching, preventing the converter from working in or too close to the capacitive mode).
- How does the synchronous burst mode operation enhance efficiency?
The synchronous burst mode operation allows both PFC and HB to work intermittently synchronized, reducing the average switching frequency and keeping converter input consumption low at light loads).
- What are the typical applications of the STCMB1TR?
Typical applications include ac-dc adapters, open frame SMPS, SMPs for LED TV, desktop, and all-in-one PC, consumer and industrial SMPS, and LED street lighting).
- What regulatory standards does the STCMB1TR comply with?
The STCMB1TR complies with standards such as EuP Lot 6, DOE, and European CoC ver. 5, Tier 2, as well as IEC 62368-1 and UL Demko certified).
- How does the STCMB1TR ensure safe start-up and operation?
The device includes a complete set of protections and features like soft-start, inrush control, and hard switching prevention to ensure safe start-up and operation).
- What is the junction temperature operating range of the STCMB1TR?
The junction temperature operating range is -40 to 150 °C).
