Texas Instruments SM72445EVM Evaluation Module SM72445EVM/NOPB SM72445EVM/NOPB 데이터 시트
제품 코드
SM72445EVM/NOPB
SM72445 Evaluation Module Design Specification
Figure 3. Slew Rate Limit (between the two markers) and Soft OVP (after the second marker)
Startup
When starting up at no load, the SM72445 will increase the duty cycle until a 1:1 conversion ratio is
reached. The system will then enter a stand-by mode and wait for the detection of power by sensing the
output current. When the voltage on AIOUT rises above the internal threshold, the system will wait for a
typical period of 64 seconds and exit the stand-by mode. This is to allow the proper start-up of a potential
inverter connected to the string of panels in which the SM72445 based optimizer would be inserted. Upon
exiting stand-by mode, the system will enter “PM mode” (see SM72445 datasheet for further explanation).
MPPT will be enabled if power variation is detected. If no power variation is detected such as when the
system is connected to a DC Electronic load for example, MPPT will be enabled only after the “PM mode”
timer expires after an additional period of 64 seconds.
reached. The system will then enter a stand-by mode and wait for the detection of power by sensing the
output current. When the voltage on AIOUT rises above the internal threshold, the system will wait for a
typical period of 64 seconds and exit the stand-by mode. This is to allow the proper start-up of a potential
inverter connected to the string of panels in which the SM72445 based optimizer would be inserted. Upon
exiting stand-by mode, the system will enter “PM mode” (see SM72445 datasheet for further explanation).
MPPT will be enabled if power variation is detected. If no power variation is detected such as when the
system is connected to a DC Electronic load for example, MPPT will be enabled only after the “PM mode”
timer expires after an additional period of 64 seconds.
Figure 4. Start-Up Pattern With Unloaded Output
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AN-2241 SM72445 Evaluation Board
SNVA649A – May 2012 – Revised May 2013
Copyright © 2012–2013, Texas Instruments Incorporated