The IR2156 is a ballast control IC that integrates a high voltage half-bridge gate driver with a programmable oscillator. It features programmable preheat and run frequencies, programmable preheat time, programmable dead-time, and programmable over-current protection. It also includes comprehensive protection features such as lamp failure strike protection, filament failure protection, and automatic restart function.
The IR2156 is a high‑voltage half‑bridge gate driver with a programmable oscillator, designed for ballast control in fluorescent lighting. It includes programmable preheat and run frequencies, over‑current protection, and a range of safety features such as lamp‑strike protection and automatic restart.
The device is offered in 14‑lead PDIP and 14‑lead SOIC packages and is qualified for industrial use. Typical applications include 42W‑Quad Biax ballasts powered from 120 VAC. Electrical characteristics, timing diagrams, and recommended operating conditions are provided for design reference.
| Supply voltage (VCC) | 14 V ±0.25 V |
|---|---|
| Maximum supply current (I CC) | 5 mA |
| Available packages | 14‑lead PDIP, 14‑lead SOIC |
| Dead‑time (tDLO / tDHO) | 2.0 µs |
The recommended supply voltage is 14 V with a tolerance of ±0.25 V.
The IR2156 is offered in 14‑lead PDIP and 14‑lead SOIC packages.
The device is rated for a maximum junction temperature of 150 °C.
The dead‑time is specified as 2.0 µs for both low‑side and high‑side outputs.