IGBTs for lighting
“S” series IGBTs for pre-heating ballast
and light dimmer applications

The built-in collector gate zener diodes and the integrated gate resistor on the STGD5NB120SZ ensure both a very precise active clamping and avalanche capability.

VCE(sat) < 2V @ 25°C; IC = 5A @ 100°C; BVCES = 1200V; VGE(th) < 5V @ 25°C; EAS > 10mJ @ 25°C with L = 1.8mH;
Light Dimmer Application In conventional dimming circuits the power is usually controlled by Triacs. The circuit is potentially noisy due to the AC current flowing through the series inductor used for R.F.I. filtering. The new light dimmers use an isolated gate power switch such as an IGBT. This dimmer can work at any mains voltage by adapting the IGBT to the load, where the power is controlled by varying its conduction time.   A typical light dimmer schematic using an IGBT Should a short circuit occur, the over current is sensed across the shunt resistor. As soon as the shunt voltage reaches a predetermined level, the IGBT is turned off and the controller is reset for a long enough period to avoid spurious restart. STGF20NB60S & STGF7NB60SL For Light Dimmers

The STGF7NB60SL and the STGF20NB60S are the latest IGBTs designed specifically for light dimming applications. Thanks to the lower threshold voltage, the STGF7NB60SL represents the best solution for light dimmers driven directly by a micro-controller. The 7A IGBT also shows higher ruggedness against short circuit (t_SCW = 14µs typical), even if this is not requested for a slow-switching device.