Infineon IR2156 Ballast Control IC 14-Pin

Infineon IR2156 Ballast Control IC 14-Pin is a ballast control integrated circuit designed for high-performance electronic ballast applications, combining a high-voltage half-bridge gate driver with a programmable oscillator in a single 14-pin package.

Overview

The IR2156 integrates the ballast controller and half-bridge driver, creating a control solution that can reduce component count and simplify circuit design. The IC also features a detailed state diagram for its control logic.

Programmable Features

Users can set the following parameters to match specific lamp requirements:

• Preheat frequency
• Preheat time
• Run frequency
• Programmable dead-time
• Overcurrent protection threshold

These adjustments allow tuning of the ballast's operational parameters for efficiency and safety.

Protection Features

The IR2156 includes protection for failure-to-strike scenarios and filament failures, along with an automatic restart function. Additional safeguards include DC bus under-voltage reset, a shutdown pin with hysteresis, and internal protection against latch-up and electrostatic discharge (ESD).

Operation and Startup

Key operational features include an internal ignition ramp, a micropower startup current of 150µA, and an internal 15.6V Zener clamp diode on the Vcc line for voltage regulation. The supply voltage range is 10.5V to 16.5V, and the operating temperature range is -25°C to 125°C.

Applications

Suited to demanding lighting applications, the IR2156 is intended for high-performance electronic ballast designs. Its integrated architecture and programmable features support lighting systems that require precise control of preheat, run frequency, and protection thresholds.