| 摘要 |
A lamp intensity control system combines the functions of the tail light, the brake light, and the turn indicator light signals into one signal for controlling a plurality of lamps in an automobile. The tail light, brake light and turn indicator light signals are combined into one signal and modulated wherein the percent of modulation determines the intensity of the brightness of the plurality of lamps. Temperature protection is provided wherein a temperature limit circuit monitors the temperature of a SENSFET and disables the SENSFET if its temperature exceeds a predetermined magnitude. Over-current and open lamp conditions are monitored by comparator circuits. An over-current condition causes the SENSFET to be disabled. An over-temperature, over-current or open-lamp condition is signaled by a fault output signal.
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