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SM72445_15

更新时间： 2024-11-24 01:11:11
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德州仪器 - TI /
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SM72445 Programmable Maximum Power Point Tracking Controller With Adjustable PWM Frequency

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SM72445_15 数据手册

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SM72445  
www.ti.com  
SNVS795 –MARCH 2012  
SM72445 Programmable Maximum Power Point Tracking Controller With Adjustable PWM  
Frequency  
Check for Samples: SM72445  
1
FEATURES  
DESCRIPTION  
The SM72445 is a programmable MPPT controller  
capable of controlling four PWM gate drive signals for  
a 4-switch buck-boost converter. The SM72445 also  
features a proprietary algorithm called Panel Mode  
(PM) which allows for the panel to be connected  
directly to the output of the power optimizer circuit  
when the input to output voltage ratio is close to 1.  
This provides an opportunity to optimize the efficiency  
of the power optimizer when the load is naturally  
matching the maximum power point of the panel.  
Along with the SM72295 (Photovoltaic Full Bridge  
Driver), it creates a solution for an MPPT configured  
DC-DC converter with efficiencies up to 99.5% (when  
operating with dedicated PM switches). Integrated  
into the chip is an 8-channel, 10 bit A/D converter  
used to sense input and output voltages and currents,  
as well as IC configuration. Externally programmable  
values include maximum output voltage and current  
as well as different settings for slew rate, soft-start  
and Panel Mode.  
2
•
Renewable Energy Grade  
•
110kHz,135kHz or 215kHz PWM Operating  
Frequency  
•
Panel Mode Pin for Optional Bypass Switch  
Control  
•
•
Programmable Maximum Power Point Tracking  
Photovoltaic Solar Panel Voltage and Current  
Diagnostic  
•
Single Inductor Four Switch Buck-Boost  
Converter Control  
•
•
•
I2C Interface for Communication  
Output Overvoltage Protection  
Over-Current Protection  
PACKAGE  
•
TSSOP-28  
BLOCK DIAGRAM  
VDDA  
VDDD  
HIB  
LIB  
Vin  
Iin  
AVIN  
AIN0  
AIN1  
D0  
D1  
MPPT CONTROLLER  
HIA  
LIA  
AIIN  
CS_N  
SCLK  
AVOUT  
AIOUT  
AIN2  
AIN3  
DIN  
ADC_C  
ADC  
CONTROLLER  
CLK GEN  
ADC  
DOUT  
AIN4  
AIN5  
A0  
A2  
Vout  
Iout  
SCL  
SDA  
D2  
D3  
D4  
D5  
D6  
D7  
AIN6  
AIN7  
A4  
A6  
I2C  
I2C0  
I2C1  
I2C2  
VSSD  
VSSA  
Figure 1. Block Diagram  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2012, Texas Instruments Incorporated  
1234567...20

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