MIC79050-4.2BMM Micrel Inc, MIC79050-4.2BMM Datasheet
MIC79050-4.2BMM
Specifications of MIC79050-4.2BMM
Related parts for MIC79050-4.2BMM
MIC79050-4.2BMM Summary of contents
Page 1
... MIC79050-4.2BS 4.2V 0.75% Over Temp Regulated or IN BAT unregulated wall adapter GND Simplest Battery Charging Solution MIC79050-4.2BMM IN BAT EN FB GND *See Applications Information Pulse-Charging Application 1 MIC79050 Package SOT-223-3 SOIC-8 MSOP-8 ...
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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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... MIC79050-4.2BMM IN BAT 4.7µ GND 1k Figure 5B. PWM Based Pulse-charging Applications MIC79050-4.2BMM IN BAT 4.7µ GND Figure 6. High Current Charging MIC79050-4.2BMM BAT EN FB GND 16.2k MIC7300 SD101 221k 10k 0.01µF Figure 7. Constant Current, Constant Voltage Charger Micrel, Inc. Li-Ion Cell MIC4417 ...
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... SOIC-8 and the power MSOP-8 following suit. Power SOIC-8 Thermal Characteristics One of the secrets of the MIC79050’s performance is its power SO-8 package featuring half the thermal resistance of a standard SO-8 package. Lower thermal resistance means more output current or higher input voltage for a given pack- age size ...
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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) ...