| Vs | 6 | 18 | V | Battery voltage |
| Vcc | 4.5 | 5.5 | V | Supply voltage |
| TA | -40 | +125 | aC | Operating ambient temperature |
| TJc | | +150 | aC | Junction temperature1] |
| | | | | Absolute Maximum Ratings |
| | | | |
With these drivers, during turn-on, the high in-rush current is sensed by the internal sense resistor, drive current to the output stage is reduced, and the output operates in a linear mode with the load current limited to approximately 500 mA. During lamp warmup, the filament resistance increases to its maximum value, the output driver goes into saturation and applies maxi- mum rated voltage to the lamp.