MCP73811 MICROCHIP [Microchip Technology], MCP73811 Datasheet
MCP73811
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MCP73811 Summary of contents
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... The MCP73811/2 employ a constant current/constant voltage charge algorithm. The constant voltage regula- tion is fixed at 4.20V, with a tight regulation tolerance of 1%. For the MCP73811, the constant current value is selected (low power USB port) or 450 mA (high power USB port) with a digital input signal on the PROG input ...
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... G=0.001 PROG Reference Generator V (1.21V) REF DS22036A-page 2 500 mA Li-Ion Battery Charger Single Li-Ion 1 µF - Cell 1 CE MCP73811 2.7 kΩ 12 kΩ 388.7 kΩ 111 kΩ 157.3 kΩ Direction Control + 528.6 kΩ BAT Charge Enable + - 3 V BAT + Single Li-Ion 1 µF - ...
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... kHz OUT dB I =10 mA kHz OUT dB I =10 mA MHz OUT mA MCP73811 - PROG = Low mA MCP73811 - PROG = High mA MCP73812 - PROG = 20 kΩ mA MCP73812 - PROG = 10 kΩ mA MCP73812 - PROG = 2 kΩ =-5°C to +55°C A mΩ 3.75V 105° ...
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... DC CHARACTERISTICS (Continued) Electrical Specifications: Unless otherwise indicated, all limits apply for -40°C to +85°C. Typical values are at +25° Parameters Sym Charge Enable (CE), PROG Input - MCP73811 Input High Voltage Level V IH Input Low Voltage Level V IL Input Leakage Current ...
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... Ambient Temperature (T MCP73811/2 = +25°C, Constant-voltage mode. A PROG = Low Temp = +25°C 4.75 5 5.25 5.5 5.75 6 Supply Voltage (V) Charge Current (I ) vs. OUT ) - MCP73811. DD PROG = High Temp = 25°C 4.75 5 5.25 5.5 5.75 6 Supply Voltage (V) Charge Current (I ) vs. OUT ) - MCP73811. DD PROG = Low Ambient Temperature (°C) Charge Current (I ) vs. OUT ) - MCP73811. A DS22036A-page 5 ...
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... Note: Unless otherwise indicated 480 470 460 450 440 430 420 410 400 -40 -30 -20 - Ambient Temperature (°C) FIGURE 2-7: Charge Current (I Ambient Temperature ( MCP73811. A 550 500 450 400 350 300 250 200 150 100 ...
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... Rejection (PSRR kΩ PROG vs. FIGURE 2-17: OUT 100 1000 FIGURE 2-18: MCP73811/2 = +25°C, Constant-voltage mode 100 1000 Frequency (kHz) Power Supply Ripple 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0. OUT C = 4.7 µF, X7R -0.25 OUT Ceramic -0.30 Time (µs) Line Transient Response. ...
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... MCP73811/2 Typical Performance Curves (Continued) Note: Unless otherwise indicated 0.35 0.30 0.25 0.20 0.15 0.10 0. 4.7 µF, X7R OUT 0.00 Ceramic -0.05 Time (µs) FIGURE 2-19: Load Transient Response. 1.40 1.20 1.00 0.80 0.60 0.40 0. 4.7 µF, X7R OUT 0.00 Ceramic -0.20 Time (µs) FIGURE 2-20: Load Transient Response. DS22036A-page (typ and T REG OUT 0.04 6.0 0.02 5.0 0.00 4.0 -0.02 3.0 -0.04 -0.06 2.0 MCP73812/IOT -0.08 V 1.0 DD -0.10 R PROG -0 ...
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... A supply voltage of [V recommended. Bypass to V 3.5 Current Regulation Set (PROG) For the MCP73811, the current regulation set input (PROG) functions as a digital input selection. A logic Low selects charge current; a logic High selects a 450 mA charge current. For the MCP73812, the charge current is set by placing ...
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... The automatic circuit is always active. Whenever the input supply is within + the voltage at the V pin, the MCP73811/2 is placed in a shutdown mode. During power down condition, the battery reverse dis- charge current is less than 2 µA. For a charge cycle to begin, the automatic power down conditions must be met and the charge enable input must be above the input high threshold ...
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... Thermal Regulation The MCP73811/2 limits the charge current based on the die temperature. The thermal regulation optimizes the charge cycle time while maintaining device reliability. Figure 4-2 depicts the thermal regulation for the MCP73811/2. . 525 450 375 300 225 150 75 0 Junction Temperature (°C) FIGURE 4-2: Thermal Regulation ...
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... MCP73811 CURRENT REGULATION SELECT (PROG) For the MCP73811, driving the PROG input to a logic Low selects the low charge current setting (85 mA). Driving the PROG input to a logic High selects the high ) PROG charge current setting (450 mA). © ...
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... APPLICATIONS The MCP73811/2 is designed to operate in conjunction with a host microcontroller or applications. The MCP73811/2 provides the preferred C IN REGULATED WALL CUBE FIGURE 6-1: Typical Application Circuit. 6.0 5.0 4.0 3.0 2.0 MCP73812/IOT V = 5.2V 1 kΩ PROG 0.0 Time (s) FIGURE 6-2: Typical Charge Profile (180 mAh Battery). 6.0 5.0 4.0 3.0 2.0 MCP738312 V = 5.2V 1 kΩ PROG ...
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... SOT-23-5 package will cause thermal regulation to be entered as depicted in Figure 6-3. 6.1.1.3 External Capacitors The MCP73811/2 is stable with or without a battery load. In order to maintain good AC stability in the Constant-voltage mode, a minimum capacitance of 1 µF is recommended to bypass the V This capacitance provides compensation when there is no battery load. In addition, the battery and intercon- nections appear inductive at high frequencies ...
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... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2007 Microchip Technology Inc. Standard * Part Number Code MCP73811T-420I/OT KSNN MCP73812T-420I/OT KWNN MCP73811/2 Example: KSNN DS22036A-page 15 ...
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... MCP73811/2 5-Lead Plastic Small Outline Transistor (OT or CT) [SOT-23] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging Number of Pins Lead Pitch Outside Lead Pitch Overall Height Molded Package Thickness Standoff ...
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... APPENDIX A: REVISION HISTORY Revision A (March 2007) • Original Release of this Document. © 2007 Microchip Technology Inc. MCP73811/2 DS22036A-page 17 ...
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... MCP73811/2 NOTES: DS22036A-page 18 © 2007 Microchip Technology Inc. ...
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... PART NO. XXX X Device Voltage Temperature Options Device: MCP73811T: Li-Ion Charger w/Selectable Charge Current, Tape and Reel MCP73812T: Li-Ion Charger w/Selectable Charge Current, Tape and Reel Voltage Options *: 420 = 4.2V “Standard” *Contact factory for other output voltage options. Temperature -40°C to +85°C ...
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... MCP73811/2 NOTES: DS22036A-page 20 © 2007 Microchip Technology Inc. ...
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Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...
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