TNY264P

The TNY264P, part of the TinySwitch™-II series from Power Integrations, is a highly integrated monolithic IC designed for AC DC conversion. It operates directly from the DRAIN pin, simplifying design by eliminating the need for bias windings. This device features auto-restart, undervoltage sensing, and frequency jittering at 132 kHz, contributing to low EMI and high reliability.

Key specifications include a breakdown voltage of 700V and an operating frequency of 132kHz. The TNY264P includes built-in protections for output short or open loop conditions, minimizing audible noise in typical transformer designs. It is suitable for applications like standby power supplies, reducing component count and cost.

The device integrates an oscillator, current limit comparator, state machine, thermal shutdown, undervoltage lockout, current limit adjustment, startup, and auto-restart logic. The oscillator generates the switching frequency with jittering to reduce EMI, while the current comparator and state machine manage MOSFET on-time and protect against overcurrent conditions. Undervoltage lockout prevents startup when input or bypass pin voltage is too low, and auto-restart limits attempts in fault conditions for enhanced safety.