The ALTAIR05T-800 is a high-voltage all-primary sensing switcher intended for operating directly from the rectified mains with minimum external parts. It combines a high-performance low-voltage PWM controller chip and an 800 V avalanche-rugged power section in the same package.
ALTAIR05T-800 is an off-line all-primary-sensing switching regulator that combines a low-voltage PWM controller and an 800 V avalanche-rugged power section in the same package. It provides constant voltage and constant current (CV/CC) regulation using primary-sensing feedback, eliminating the optocoupler, and supports quasi-resonant operation.
The datasheet covers device description, pin connection, maximum ratings, electrical characteristics, application information, typical application, package mechanical data and order codes. It lists an SO16 package and applications such as AC-DC chargers for mobile phones and other handheld equipment.
| Drain-to-source voltage | -1 to 800 V |
|---|---|
| Drain current | 1 A |
| Maximum switching frequency | Below 166 kHz |
| Power dissipation at TA = 50°C | 0.9 W |
| Thermal resistance, junction-to-pin | 10 °C/W |
| Vcc operating range | 11.5 to 23 V |
No. It provides constant voltage and constant current regulation using primary-sensing feedback with no optocoupler.
It is intended for AC-DC chargers for mobile phones and other handheld equipment, and compact SMPS requiring precise current and/or voltage regulation.
Yes, the datasheet lists quasi-resonant operation as a feature.
The datasheet gives a drain-to-source voltage range of -1 to 800 V.