The CN3717 is specially designed for charging lead-acid battery with trickle charge, constant current charge, over-charge and float charge mode. In over-charge and float charge mode, the regulation voltage is set by the external resistor divider. The constant charging current is programmable with a single sense resistor.
General Descriptions: The CN3717 is a PWM switch-mode battery charger controller for lead-acid battery in a small package using few external components. The CN3717 is specially designed for charging lead-acid battery with trickle charge, constant current charge, over-charge and float charge mode.
Consult the factory for MSOP availability. The MCP73837 and MCP73838 devices are fully integrated linear Li-Ion/Li-Polymer battery chargers with autonomous power source selection. Along with its small physical size, the low number of external components required makes the MCP73837/8 ideally suitable for portable applications.
Alternatively, the 3 mm x 3 mm DFN package could be utilized to reduce the charge cycle times. The MCP73837/8 is stable with or without a battery load. In order to maintain good AC stability in the Con- stant Voltage mode, a minimum capacitance of 1 μF is recommended to bypass the VBAT pin to VSS.
For the USB port powered systems, the MCP73837/8 specifically adheres to the current limits governed by the USB specification. The host microcontroller can select from two preset maximum charge current rates of 100 mA (low-power USB port) or 500 mA (high-power USB port).
The constant voltage regulation is fixed with four available options: 4.20V, 4.35V, 4.40V or 4.50V, to accommodate the new emerging battery charging requirements. The MCP73837/8 limits the charge current, based on die temperature, during high power or high ambient conditions.
Intelligent Battery Charger Reference Design
to proper battery charging. The power source for this design is a buck converter. A buck converter was chosen because of its simplicity, efficiency and low heat dissipation. A simplified dia-gram of the converter circuit is shown in Figure 4. FIGURE 4: SIMPLIFIED BUCK CONVERTER Buck Converter Basics The PIC16C7XX microcontroller controls the buck con-verter through the …
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Using a battery sends electrons along a conductive path from the anode (-) to the cathode (+). Charging a battery changes the flow of electrons, causing the electrochemical process to occur in reverse. Battery charger ICs with relatively high supply voltages and quiescent currents are well-suited for batteries that contain a relatively large numbers of cells. For both …
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Technical Specification Manufacturer: Vishay Intertechnology Part/Model Number: Si7137DP Type: IC Product Status: Genuine & Brand New (QC) Is customized? - Yes Warranty: No (Non-Returnable ) Fitting Charge : Applicable* See details Tips : To avoid wrong order placed or wrong item you bought, follow the specific part number before ordering.
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The CN3717 is a PWM switch-mode battery charger controller for lead-acid battery in a small package using few external components. The CN3717 is specially designed for charging lead-acid battery with trickle charge, constant current charge, over-charge and float charge mode.
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Panasonic Industry Europe GmbH | Industry Sector Partner
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