Description
The MCP73833 is a highly advanced linear charge management controller for use in space-limited, cost sensitive applications. The low number of external components required makes the MCP73833 ideally suited for portable applications. For applications charging from a USB port, the MCP73833 can adhere to all the specifications governing the USB power bus. The MCP73833 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 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%. Refer to Section 1.0 “Electrical Characteristics” for available options and the “Product Identification System” for standard options. The MCP73833 is fully specified over the ambient temperature range of -40°C to +85°C.
Features
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:
Refer to Section 1.0 “Electrical
Characteristics” for Selectable Options
Refer to the Product Identification System for
Standard Options
Applications
Lithium-Ion / Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Digital Cameras
MP3 Players
Bluetooth Headsets
USB Chargers
