7.3.1 Advanced Emulated Current Mode Control

The TPS56339 uses an Advanced Emulated Current Mode (AECM) control, which is an emulated current control topology. The TPS56339 uses an internal oscillator to generate clock to trigger high-side MOSFET turn on. Once the emulated inductor current ramp up trigger internal reference, the high-side MOSFET turns off and the low-side MOSFET turns on. Until the next clock coming, the low-side MOSFET turns off and the high-side MOSFET turns on again. The switching frequency is controlled by the oscillator clock and is fixed that provides ease of filter design to overcome EMI noise. The internal adaptive loop adjustment eliminates the need for external compensation over a wide voltage output range up to 16V. However, dynamic adjustment output voltage is not supported.