| 摘要 |
An LED driver comprises a first transistor for setting an output current level at an output of the LED driver that is responsive to a programmable current and an input signal. A second transistor in series with the first transistor provides voltage protection for the first transistor. The first transistor and the second transistor support an output voltage higher than a maximum operating voltage of either of the first or the second transistor alone. Biasing circuitry generates an adaptive bias voltage for the second transistor to protect the first transistor and the second transistor from high voltage levels at the output of the LED driver.
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