SM72442 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels

SM72442
May 12, 2011
Programmable Maximum Power Point Tracking Controller
for Photovoltaic Solar Panels
General Description
The SM72442 is a programmable MPPT controller capable of
controlling four PWM gate drive signals for a 4-switch buck-
boost converter. The SM72442 also features a proprietary
algorithm called Panel Mode which allows for the panel to be
connected directly to the output of your power optimizer cir-
cuit. Along with the SM72295 (Photovoltaic Full Bridge Driv-
er), it creates a solution for an MPPT configured DC-DC
converter with efficiencies up to 99.5%. Integrated into the
chip is an 8-channel, 12 bit A/D converter used to sense input
and output voltages and currents, as well as board configu-
ration. Externally programmable values include maximum
output voltage and current as well as different settings forslew
rate, soft-start and Panel Mode.
Features
■ ^{Renewable Energy Grade}
■ ^{Programmable maximum power point tracking}
■ ^{Photovoltaic solar panel voltage and current diagnostic}
■ ^{Single inductor four switch buck-boost converter control}
■ ^{I2C interface for communication}
■ ^{VOUT Overvoltage protection}
■ ^{Over-current protection}
Package
■ ^TSSOP-28
Block Diagram
FIGURE 1. Block Diagram
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