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Solar charge controllers for Lithium-ion, NiMH, NiCad

Custom design and manufacture of state-of-the-art battery chargers, UPS, and power supplies for OEMs in a hurry?

DC-DC solar charge controllers
This is a microprocessor controlled DC/DC converter which can be used as a solar charge controller for lithium-ion, Nickel-Cadmium, and Nickel metal hydride batteries. It also has serial communications and is programmable with great flexibility.

Serial communications allows you to control voltage, current, or power remotely, or to select on-board programs.
Very flexible input and output voltages available
Can be used as a solar charge controller for a wide variety of cell counts and battery capacity.
Can use locally to the battery to boost voltage after a long wire run, for example on POE.
Output voltage can be higher or lower than the input voltage.
State-of-the-art charging algorithms available for a variety of battery chemistries and types
Also useful in other energy harvesting applications since it can be programmed to use whatever power is available, unlike other battery charging circuits.
Input and output voltage and current sense can be read by the on-board microcontroller. Other A/D and digital input pins are available to adapt to your needs, for example battery charge termination measurement, capacity testing, battery quality testing, electrolysis, sensor control, etc.

Form factor and custom features can be designed to OEM requirements.

This product is a platform that can be programmed to meet your system requirements. Typical programming fees are $500 to $2000 depending on complexity and test requirements.

Following is a custom modification of this technology for an OEM application:

Input voltage 8-48 volts nominal, higher range possible
Output Voltage: 2 volts to 80 volts available
Output Power 30 watts, 50 watts or higher depending on design
Termination method -deltaV, (could be made to do delta T/ delta t, peak detect, and timer)
Form Circuit board product, frame or case developed on request
Dimensions 4" x 1.8" x 0.5" (10 cm x 4.6 cm x 2 cm) or smaller, depending on power requirements
Mounting Diagram Dimensioned mounting diagram
Weight 1.2 oz, 34 grams

Versions for which the firmware is already available  
8 to 10 cell NiMH and NiCad  
12V lead acid  
4 cell NiMH and NiCad  

Connector Pin out  
J3 Pin1 Negative out
Pin2 Positive out to battery
Pin3 N/C
Pin4 negative to green LED (needs a 1K resistor)
Pin5 negative to yellow LED (needs a 1K resistor in series)
Pin6 negative to red LED (ditto) Pin7 +5V for LED return
Mating connector example:
1 piece Molex 22-01-2075 housing 7 Pieces Molex 08-50-0114 crimp terminal
J4 Pin1 RX
Pin2 TX
J5 Pin 1 MCLR
Pin 2 VDD
Pin 3 NEG
Pin 4 DAT 5 CLK

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