SNVS795 – MARCH 2012
SM72445 Programmable Maximum Power Point Tracking Controller With Adjustable PWM
Check for Samples: SM72445
•2 Renewable Energy Grade
• 110kHz,135kHz or 215kHz PWM Operating
• Panel Mode Pin for Optional Bypass Switch
• Programmable Maximum Power Point Tracking
• Photovoltaic Solar Panel Voltage and Current
• Single Inductor Four Switch Buck-Boost
• I2C Interface for Communication
• Output Overvoltage Protection
• Over-Current Protection
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.
Figure 1. Block Diagram
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.
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