| 摘要 |
An LED driver circuit structure with over-current suppression is provided. The LED driver circuit includes a DC-DC converter, a voltage detector, a reference voltage supplier module, an error amplifier, a comparator, and an SR-latch. The LED driver circuit structure controls the output voltage and thus the output current of the DC-DC converter by multi-step switching of reference voltages and current levels to achieve over-current suppression, thereby extending an LED endurance period and increasing a PWM dimming frequency range for LED brightness control applications. |
