Datasheet MCP73831, MCP73832 (Microchip)

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MCP73831/2 Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers Features: Description:
• Linear Charge Management Controller: The MCP73831/2 devices are highly advanced linear - Integrated Pass Transistor charge management controllers for use in space- - Integrated Current Sense limited, cost-sensitive applications. The MCP73831/2 are available in an 8-Lead, 2 mm x 3 mm DFN package - Reverse Discharge Protection or a 5-Lead, SOT-23 package. Along with their smal • High Accuracy Preset Voltage Regulation: + 0.75% physical size, the low number of external components • Four Voltage Regulation Options: required make the MCP73831/2 ideally suited for - 4.20V, 4.35V, 4.40V, 4.50V portable applications. For applications charging from a • Programmable Charge Current: 15 mA to 500 mA USB port, the MCP73831/2 adhere to all the • Selectable Preconditioning: specifications governing the USB power bus. - 10%, 20%, 40%, or Disable The MCP73831/2 employ a constant-current/constant- voltage charge algorithm with selectable • Selectable End-of-Charge Control: preconditioning and charge termination. The constant - 5%, 7.5%, 10%, or 20% voltage regulation is fixed with four available options: • Charge Status Output 4.20V, 4.35V, 4.40V or 4.50V, to accommodate new, - Tri-State Output - MCP73831 emerging battery charging requirements. The constant - Open-Drain Output - MCP73832 current value is set with one external resistor. The • Automatic Power-Down MCP73831/2 devices limit the charge current based on die temperature during high power or high ambient • Thermal Regulation conditions. This thermal regulation optimizes the • Temperature Range: -40°C to +85°C charge cycle time while maintaining device reliability. • Packaging: Several options are available for the preconditioning - 8-Lead, 2 mm x 3 mm DFN threshold, preconditioning current value, charge - 5-Lead, SOT-23 termination value and automatic recharge threshold. The preconditioning value and charge termination
Applications:
value are set as a ratio or percentage of the • Lithium-Ion/Lithium-Polymer Battery Chargers programmed constant current value. Preconditioning can be disabled. Refer to
Section 1.0 “Electrical
• Personal Data Assistants
Characteristics”
for available options and the • Cellular Telephones
Product Identification System
for standard options. • Digita l Cameras The MCP73831/2 devices are fully specified over the • MP3 Players ambient temperature range of -40°C to +85°C. • Bluetooth Headsets • USB Chargers
Package Types Typical Application MCP73831/2 MCP73831/2
2×3 DFN* SOT-23-5
500 mA Li-Ion Battery Charger
VIN 4 VDD 1 8 PROG STAT 1 5 PROG V 3 DD VBAT + Single V 2 EP 7 NC V 2 4.7 F 4.7 F Li-Ion SS DD - Cell 9 V V 3 6 V BAT 3 4 VDD 5 BAT SS PROG VBAT 4 5 STAT 470 2 k * Includes Exposed Thermal Pad (EP); see Table 3-1. 1 2 STAT VSS
MCP73831
 2005-2014 Microchip Technology Inc. DS20001984G-page 1 Document Outline MCP73831/2 Functional Block Diagram 1.0 Electrical Characteristics 2.0 Typical Performance Curves FIGURE 2-1: Battery Regulation Voltage (VBAT) vs. Supply Voltage (VDD). FIGURE 2-2: Battery Regulation Voltage (VBAT) vs. Ambient Temperature (TA). FIGURE 2-3: Output Leakage Current (IDISCHARGE) vs. Battery Regulation Voltage (VBAT). FIGURE 2-4: Charge Current (IOUT) vs. Programming Resistor (RPROG). FIGURE 2-5: Charge Current (IOUT) vs. Supply Voltage (VDD). FIGURE 2-6: Charge Current (IOUT) vs. Supply Voltage (VDD). FIGURE 2-7: Charge Current (IOUT) vs. Ambient Temperature (TA). FIGURE 2-8: Charge Current (IOUT) vs. Ambient Temperature (TA). FIGURE 2-9: Charge Current (IOUT) vs. Junction Temperature (TJ). FIGURE 2-10: Charge Current (IOUT) vs. Junction Temperature (TJ). FIGURE 2-11: Power Supply Ripple Rejection (PSRR). FIGURE 2-12: Power Supply Ripple Rejection (PSRR). FIGURE 2-13: Line Transient Response. FIGURE 2-14: Line Transient Response. FIGURE 2-15: Load Transient Response. FIGURE 2-16: Load Transient Response. FIGURE 2-17: Complete Charge Cycle (180 mAh Li-Ion Battery). FIGURE 2-18: Complete Charge Cycle (1000 mAh Li-Ion Battery). 3.0 Pin Description TABLE 3-1: Pin Function TableS 3.1 Battery Management Input Supply (VDD) 3.2 Battery Charge Control Output (VBAT) 3.3 Charge Status Output (STAT) 3.4 Battery Management 0V Reference (VSS) 3.5 Current Regulation Set (PROG) 3.6 Exposed Thermal Pad (EP) 4.0 Device Overview FIGURE 4-1: Flowchart. 4.1 Undervoltage Lockout (UVLO) 4.2 Battery Detection 4.3 Charge Qualification 4.4 Preconditioning 4.5 Fast Charge Constant-Current Mode 4.6 Constant-Voltage Mode 4.7 Charge Termination 4.8 Automatic Recharge 4.9 Thermal Regulation FIGURE 4-2: Thermal Regulation. 4.10 Thermal Shutdown 5.0 Detailed Description 5.1 Analog Circuitry 5.2 Digital Circuitry TABLE 5-1: Status Output 6.0 Applications FIGURE 6-1: Typical Application Circuit. FIGURE 6-2: Typical Charge Profile (180 mAh Battery). FIGURE 6-3: Typical Charge Profile in Thermal Regulation (1000 mAh Battery). 6.1 Application Circuit Design 6.2 PCB Layout Issues FIGURE 6-4: Typical Layout (Top). FIGURE 6-5: Typical Layout (Bottom). 7.0 Packaging Information 7.1 Package Marking Information Appendix A: Revision History Product ID System Trademarks Worldwide Sales