MIC79050-4.2BS Micrel Inc, MIC79050-4.2BS Datasheet
MIC79050-4.2BS
Specifications of MIC79050-4.2BS
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MIC79050-4.2BS Summary of contents
Page 1
... Self charging battery packs Junction Voltage Temp. Range 4.2V –40ºC to +125ºC 4.2V –40ºC to +125ºC 4.2V –40ºC to +125ºC MIC79050-4.2BS 4.2V 0.75% Over Temp Regulated or IN BAT unregulated wall adapter GND Simplest Battery Charging Solution MIC79050-4.2BMM ...
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... BAT MIC79050-x.xBM/YM SOIC-8 and MSOP-8 Pin Function Supply Input Ground: SOT-223 pin 2 and are internally connected. SO-8 pins 5 through 8 are TAB internally connected. Battery Voltage Output Enable (Input): TTL/CMOS compatible control input. Logic high = enable; logic low or open = shutdown. Feedback Node ...
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... T ) ÷ θ D(max) J(max) A Micrel, Inc. IN Max Units +0.75 % 0.05 %/V 0.1 %/V 0.5 % 0.7 % 500 mV 600 mV 130 µA 170 µ µA 8 µA dB 900 mA 1000 mA %/ –1 µA –2 µA 20 µA 25 µA . Exceeding the JA MIC79050 ...
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... SUPPLY VOLTAGE (V) Ground Current vs. Temperature 13.5 13.0 12.5 12.0 11.5 11.0 - 120 TEMPERATURE (°C) MIC79050 Dropout Voltage vs. Temperature 600 500 400 300 200 100 0 - 120 TEMPERATURE (°C) Output Current vs. Ground 100 200 300 400 500 OUTPUT CURRENT (mA) Ground Current vs ...
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... TIME (hrs) August 2005 Reverse Leakage Current vs. Output Voltage OUTPUT VOLTAGE (V) Reverse Leakage Current vs. Temperature 20 4.2V 15 3. GROUNDED TEMPERATURE (°C) 5 Micrel, Inc. Reverse Leakage Current vs. Output Voltage 20 4.2V 15 3. FLOATING TEMPERATURE (°C) MIC79050 ...
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... Battery Output The BAT pin is the output of the MIC79050 and connects directly to the cell to provide charging current and voltage. When the input is left floating or grounded, the BAT pin limits reverse current to < ...
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... The load-line of the unregulated output should be < 4.4V to 4.6V at somewhere between 0. the battery under charge. This 4.4 to 4.6V value is an approximate number based on the headroom needed above 4.2V for the MIC79050 to operate correctly e.g. For Impedence AC Load-line Wall Adapter R1 ...
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... V pulled low and charging will initiate. Variations on this scheme can be implemented, such as the circuit shown in Figure 2. For those designs that have a zero impedance source , see Figure 3. MIC79050-4.2BM IN BAT EN FB GND 1k ...
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... When the voltage decays below this set threshold, the MIC834 drives Q1 low allowing the MIC79050 to turn on again and provide current to the battery until it is fully charged. This form of pulse charging is an acceptable way of maintaining the full charge on a cell until it is ready to be used ...
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... The maximum varies between 1C – 1.3C (1× to 1.3× the capacity of the cell). The MIC79050 can be used for any cell size. The size of the cell and the current capability of the input source will determine the overall circuit charge rate. For example, a 1200mAh battery charged with the MIC79050 can be charged at a maximum of 0 ...
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... 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 for termination, while a current-limited input supply offers the constant-current por- tion of the algorithm ...
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... POWER DISSIPATION (W) Figure 10. Copper Area vs. Power-SOIC Power Dissipation (T MIC79050 Power MSOP-8 Thermal Characteristics The power-MSO-8 package follows the same idea as the power-SO-8 package, using four ground leads with the die attach paddle to create a single-piece electrical and thermal conductor, reducing thermal resistance and increasing power dissipation capability ...
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... MIC79050 Package Information August 2005 SOT-223 (S) 8-Pin SOIC (M) 13 Micrel, Inc. MIC79050 ...
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... A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify MIC79050 0.199 (5.05) ...