MIC79050_05 MICREL [Micrel Semiconductor], MIC79050_05 Datasheet
MIC79050_05
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MIC79050_05 Summary of contents
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MIC79050 General Description The MIC79050 is a simple single-cell lithium-ion battery char- ger. It includes an on-chip pass transistor for high precision charging. Featuring ultrahigh precision (+0.75% over the Li- ion battery charging temperature range) and “zero” off mode current, ...
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MIC79050 Pin Configuration Pin Description Pin No. Pin No. Pin Name SOT-223 SOIC-8 MSOP 5–8 GND TAB 3 3 BAT MIC79050 GND TAB GND BAT MIC79050-x.xBS/YS SOT-223 EN ...
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MIC79050 Absolute Maximum Ratings Supply Input Voltage (V ) ..............................–20V to +20V IN Power Dissipation (P ) ................ Internally Limited, Note 3 D Junction Temperature (T ) ........................ –40°C to +125°C J Lead Temperature (soldering, 5 sec.) ........................ 260°C Storage ...
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MIC79050 Typical Characteristics Dropout Voltage vs. Output Current 400 300 200 100 0 0 100 200 300 400 500 OUTPUT CURRENT (mA) Dropout Characteristics 5 4 250mA 500mA INPUT VOLTAGE (V) Ground ...
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MIC79050 Typical Voltage Drift Limits vs. Time 0.75 0. Lower -0.25 -0.75 0 200 400 600 800 TIME (hrs) August 2005 Reverse Leakage Current vs. Output Voltage ...
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MIC79050 Block Diagrams Current Limit Thermal Shutdown MIC79050-x.xBS 3-Pin Version Functional Description The MIC79050 is a high-accuracy, linear battery charging circuit designed for the simplest implementation of a single lithium-ion (Li-ion) battery charger. The part can operate ...
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MIC79050 Applications Information Simple Lithium-Ion Battery Charger. Figure 1A shows a simple, complete lithium-ion battery char- ger. The charging circuit comprises of a cheap wall adapter, with a load-line characteristic. This characteristic is always present with cheap adapters due to ...
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MIC79050 End of Charge (V Unregulated Input Voltage(V 79050 Programmed Output Voltage (No LoadVoltage) Battery Voltage (V Battery Current (I The Charging Cycle (See Figure 1C.) 1. State A: Initial charge. Here the battery’s charging cur- rent is limited by ...
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MIC79050 Protected Constant-Current Charger Another form of charging is using a simple wall adapter that offers a fixed voltage at a controlled, maximum current rating. The output of a typical charger will source a fixed voltage at a maximum current ...
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MIC79050 MIC79050-4.2BMM IN BAT VIN 4.7µ GND 100k R1 R2 GND V V Figure 4. Pulse Charging For Top-off Voltage Charging Rate Lithium-ion cells are typically charged at rates that are frac- tional multiples of their rated capacity. ...
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MIC79050 Simple Charging The MIC79050 is available in a three-terminal package, allow- ing for extremely simple battery charging. When used with a current-limited, low-power input supply, the MIC79050-4.2BS completes a very simple, low-charge-rate, battery-charger circuit. It provides the accuracy required ...
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MIC79050 temperature is +40°C and the power dissipation is as above, 0.46W, the curve in Figure 10 shows that the required area 2 of copper is 50mm . The θ of this package is ideally 63°C/W, but it will vary ...
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MIC79050 Package Information August 2005 SOT-223 (S) 8-Pin SOIC (M) 13 Micrel, Inc. MIC79050 ...
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MIC79050 0.122 (3.10) 0.112 (2.84) 0.036 (0.90) 0.032 (0.81) 0.012 (0.3) 0.0256 (0.65) TYP MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed ...