SPRSP68B January 2023 – November 2023 TMS320F2800152-Q1 , TMS320F2800153-Q1 , TMS320F2800154-Q1 , TMS320F2800155 , TMS320F2800155-Q1 , TMS320F2800156-Q1 , TMS320F2800157 , TMS320F2800157-Q1
PRODMIX
Refer to the PDF data sheet for device specific package drawings
The Comparator Subsystem (CMPSS) consists of analog comparators and supporting circuits that are useful for power applications such as peak current mode control, switched-mode power supply, power factor correction, voltage trip monitoring, and so forth.
This device contains two variants of the CMPSS module: CMPSS and CMPSS_LITE. These modules share a common architecture, but some features are supported only by the full CMPSS variant and not the CMPSS_LITE variant.
The comparator subsystem is built around a number of modules. Each subsystem contains two comparators, two reference 12-bit DACs (CMPSS_LITE instances are 9.5-bit effective reference DACs), and two digital filters. The subsystem also includes two ramp generators (full CMPSS modules only; not supported by CMPSS_LITE instances). Comparators are denoted "H" or "L" within each module where “H” and “L” represent high and low, respectively. Each comparator generates a digital output which indicates whether the voltage on the positive input is greater than the voltage on the negative input. The positive input of the comparator is driven from an external pin (see the Analog Subsystem chapter of the TMS320F280015x Real-Time Microcontrollers Technical Reference Manual for mux options available to the CMPSS). The negative input can be driven by an external pin or by the programmable reference 12-bit DAC. Each comparator output passes through a programmable digital filter that can remove spurious trip signals. An unfiltered output is also available if filtering is not required. Two ramp generator circuits are optionally available to control the reference 12-bit DAC values for the high and low comparator in the subsystem (full CMPSS modules only; not supported by CMPSS_LITE instances).
Each CMPSS includes: