Overview
The ALTAIR05T-800TR is a high-voltage all-primary sensing switcher produced by STMicroelectronics. It is designed to operate directly from the rectified mains with minimal external components. This device combines a low-voltage, high-performance PWM controller chip and an 800 V avalanche-rugged power section within the same package. This integration allows for efficient and reliable operation in various power management applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Drain-to-source (ground) voltage (VDS) | -1 to 800 | V |
| Drain current (ID) | 1 | A |
| Single pulse avalanche energy (Eav) at Tj = 25 °C, ID = 1 A | 50 | mJ |
| Supply voltage (Vcc) for Icc < 25 mA | Self-limiting | V |
| Zero-current detector current (IZCD/FB) | ±2 | mA |
| Junction temperature range (Tj) | -40 to 150 | °C |
| Storage temperature (Tstg) | -55 to 150 | °C |
| Power dissipation at TA = 50 °C (Ptot) | 0.9 | W |
| Thermal resistance, junction-to-pin (Rth j-pin) | 10 | °C/W |
| Thermal resistance, junction-to-ambient (Rth j-amb) | 110 | °C/W |
| Package | SO16N |
Key Features
- Constant voltage and constant current output regulation (CV/CC) with no optocoupler
- Tight regulation also during heavy load transients
- 800 V avalanche rugged internal power section
- Quasi-resonant (QR) operation
- Low standby power consumption
- Automatic self-supply
- Input-voltage feedforward for mains-independent CC regulation
- Output cable drop compensation
- SO16N package for efficient heat dissipation
Applications
- AC-DC chargers for mobile phones and other handheld equipment
- Compact SMPS that require precise current and/or voltage regulation
- Industrial power supplies where high reliability and efficiency are crucial
Q & A
- What is the primary function of the ALTAIR05T-800TR?
The ALTAIR05T-800TR is a high-voltage all-primary sensing switcher designed to operate directly from the rectified mains with minimal external components, providing efficient power management.
- What are the key components integrated into the ALTAIR05T-800TR?
The device combines a low-voltage, high-performance PWM controller chip and an 800 V avalanche-rugged power section in the same package.
- What type of operation does the ALTAIR05T-800TR support?
The device supports quasi-resonant (QR) operation, valley-skipping mode, and burst-mode operation at no or very light load.
- How does the ALTAIR05T-800TR manage output regulation?
The device provides constant voltage and constant current output regulation (CV/CC) with no optocoupler and includes features like input-voltage feedforward and output cable drop compensation.
- What are the thermal characteristics of the ALTAIR05T-800TR?
The device has a junction temperature range of -40 to 150 °C and thermal resistance of 10 °C/W (junction-to-pin) and 110 °C/W (junction-to-ambient).
- What package type is used for the ALTAIR05T-800TR?
The device is packaged in an SO16N package, which facilitates efficient heat dissipation.
- What are some typical applications of the ALTAIR05T-800TR?
Typical applications include AC-DC chargers for mobile phones, compact SMPS, and industrial power supplies.
- How does the ALTAIR05T-800TR manage standby power consumption?
The device features low standby power consumption, which is beneficial for energy-efficient designs.
- What safety features does the ALTAIR05T-800TR include?
The device includes features like automatic self-supply, hiccup mode OCP, and safe behavior in short-circuit conditions.
- How does the zero-current detection (ZCD) work in the ALTAIR05T-800TR?
The ZCD and triggering blocks switch on the power MOSFET based on the detection of a negative-going edge on the ZCD/FB pin, ensuring quasi-resonant operation.
