Описание
The MCP73834 is a highly advanced linear charge management controller for use in space-limited, cost sensitive applications. The MCP73834 is available in a 10-Lead, 3 mm x 3 mm DFN package or a 10-Lead, MSOP package. Along with its small physical size, the low number of external components required makes the MCP73834 ideally suited for portable applications. For applications charging from a USB port, the MCP73834 can adhere to all the specifications governing the USB power bus. The MCP73834 employs a constant current/constant voltage charge algorithm with selectable preconditioning and charge termination. The constant voltage regulation is fixed with four available options: 4.20V, 4.35V, 4.40V, or 4.50V, to accomodate new, emerging battery charging requirements. The constant current value is set with one external resistor. The MCP73833/ 4 limits the charge current based on die temperature during high power or high ambient conditions. This thermal regulation optimizes the charge cycle time while maintaining device reliability. Several options are available for the preconditioning threshold, preconditioning current value, charge termination value, and automatic recharge threshold. The preconditioning value and charge termination value are set as a ratio, or percentage, of the programmed constant current value. Preconditioning can be set to 100%. The MCP73834 is fully specified over the ambient temperature range of -40°C to +85°C.
- Complete Linear Charge Management Controller
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
- Constant Current / Constant Voltage Operation with Thermal Regulation
- High Accuracy Preset Voltage Regulation:
- 4.2V, 4.35V, 4.4V, or 4.5V, + 0.75%
- Programmable Charge Current: 1A Maximum
- Preconditioning of Deeply Depleted Cells
- Selectable Current Ratio
- Selectable Voltage Threshold
- Automatic End-of-Charge Control
- Selectable Current Threshold
- Selectable Safety Time Period
- Automatic Recharge
- Selectable Voltage Threshold
- Two Charge Status Outputs
- Cell Temperature Monitor
- Low-Dropout Linear Regulator Mode
- Automatic Power-Down when Input Power Removed
- Under Voltage Lockout
- Numerous Selectable Options Available for a Variety of Applications
- Available Packages:
- DFN-10 (3 mm x 3 mm)
- MSOP-10
