TNY288PG is a switch‑mode power supply (SMPS) controller IC manufactured by Power Integrations. It belongs to the TinySwitch‑4 family, designed for low- to medium-power AC‑DC converters in adapters, chargers, and standby power supplies. (datasheet4u.com)

This IC integrates a high-voltage MOSFET, oscillator, current-limit, and protection circuits into a single chip, which simplifies power-supply design and minimizes external components. (power.com)

Main Specifications

• Series: TinySwitch‑4

• Input voltage: 85 – 265 VAC

• Internal MOSFET voltage: 725 V

• Output power: up to ~18 W (depending on design)

• Switching frequency: 124 – 140 kHz

• Duty cycle: up to 67 %

• Package: DIP‑8 (7 pins used)

• Operating temperature: −40 °C to +150 °C (datasheet4u.com)

Key Features

• Integrated 725 V high-voltage MOSFET

• Auto‑restart protection during overload or short circuit

• Thermal shutdown protection

• Over-voltage protection

• Frequency jitter to reduce EMI noise

• Low standby power consumption (<30 mW) (power.com)

Typical Applications

• Phone and USB chargers

• AC‑DC adapters

• TV standby power supplies

• LED driver circuits

• Home appliance control boards

• Industrial small power supplies

✅ Simple explanation:
TNY288PG is a small SMPS switching IC that converts 110–220 V AC into low-voltage DC (e.g., 5 V / 12 V) for low- to medium-power electronics.

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