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MCP73837NVIUN bảng dữ liệu(PDF) 1 Page - Microchip Technology |
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1 / 30 page © 2007 Microchip Technology Inc. DS22071A-page 1 MCP73837/8 Features • High Accuracy Preset Voltage Regulation: + 0.5% • Available Voltage Regulation Options: - 4.20V, 4.35V, 4.4V, or 4.5V • Complete Linear Charge Management Controller: - Autonomous Power Source Selection - Integrated Pass Transistors - Integrated Current Sense - Integrated Reverse Discharge Protection • Constant Current (CC) / Constant Voltage (CV) Operation with Thermal Regulation • Selectable USB-Port Charge Current: - Low: 1 Unit Load / High: 5 Unit Loads • Programmable AC-Adapter Charge Current: - 15mA - 1000mA • Two Charge Status Outputs • Power-Good Monitor: MCP73837 • Timer Enable: MCP73838 • Automatic Recharge: - Selectable Voltage Threshold • Automatic End-of-Charge Control: - Selectable Charge Termination Current Ratio - Selectable Safety Timer Period • Preconditioning of Deeply Depleted Cells - can be disabled • Battery Cell Temperature Monitor • UVLO (Undervoltage Lockout) • Automatic Power-Down when Input Power is Removed • Low-Dropout (LDO) Linear Regulator Mode • 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 • Temperature Range: -40°C to 85°C • Packaging: - 10-Lead 3 mm x 3 mm DFN - 10-Lead MSOP* * Consult Factory for MSOP Package Availability. Applications • Smart Phones and Personal Data Assistants (PDA) • Portable Media Players(PMP) • Ultra Mobile Devices(UMD) • Digital Cameras • MP3 Players • Bluetooth Headsets • Handheld Medical Devices • AC/USB Dual Source Li-Ion Battery Chargers Description 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. The MCP73837/8 automatically selects the USB-Port or AC-Adapter as the power source for the system. 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). With an AC-Adapter providing power to the system, an external resistor sets the magnitude of the system or charge current up to a maximum of 1A. The MCP73837/8 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 accommodated the new emerging battery charging requirements. The MCP73837/8 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 the device reliability. The MCP73837/8 are fully specified over the ambient temperature range of -40°C to +85°C. The MCP73837/8 devices are available in a 10-Lead, 3 mm x 3 mm, DFN package or in a 10-Lead MSOP package. Advanced Stand-Alone Li-Ion / Li-Polymer Battery Charge Management Controller with Autonomous AC-Adapter or USB-Port Source Selection |
Số phần tương tự - MCP73837NVIUN |
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Mô tả tương tự - MCP73837NVIUN |
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