它将LM317正向稳压器与简单的8位PWM DAC拓扑集成在一起，从而获得了11V、1.5A的强大性能。它既保持了简单性，同时又利用了Bob Pease久经考验的杰作的内置故障保护功能(热保护和过载保护)。其输出与LM317内部电压基准的2%保证精度成正比，使其完全不受5V逻辑电源轨 ...

While this circuit may not be as efficient as an LED driver module or a switching solution the LM317 is cheap and readily available. [Afroman] also describes how the circuit works in detail ...

This design idea revisits another: “PWM power DAC incorporates an LM317.” Like the earlier circuit, this one implements a power DAC by integrating an LM317 positive regulator into a mostly passive PWM ...