Difference between revisions of "Microduino-BM"
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| − | ==Specifications== | + | ===Specifications=== |
* First, let's look at the interface of the module: | * First, let's look at the interface of the module: | ||
* A key switch | * A key switch | ||
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| − | ==Charging== | + | ===Charging=== |
* First access external 5V charging power supply, and then switch to "IN", the module into the charging state, then four LED lights do Surge charging indication (detailed display mode, please refer to HT4901 documentation), the maximum charging current to 500mA, charging is completed * after the first switch to OUT, and then unplug the external 5V charging power. | * First access external 5V charging power supply, and then switch to "IN", the module into the charging state, then four LED lights do Surge charging indication (detailed display mode, please refer to HT4901 documentation), the maximum charging current to 500mA, charging is completed * after the first switch to OUT, and then unplug the external 5V charging power. | ||
* Note: | * Note: | ||
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| − | ==Discharge== | + | ===Discharge=== |
* Make sure the switch is in the OUT, after access to the battery, in the standby mode, short press button switch (time> 50mS), the module that wakes up from standby mode; boost output started at this time, while open UPIN27 the GND circuit: Interface 5V 5V output voltage, maximum current of 500mA; while 3V3 interface output voltage of 3.3V, the maximum current 250mA. | * Make sure the switch is in the OUT, after access to the battery, in the standby mode, short press button switch (time> 50mS), the module that wakes up from standby mode; boost output started at this time, while open UPIN27 the GND circuit: Interface 5V 5V output voltage, maximum current of 500mA; while 3V3 interface output voltage of 3.3V, the maximum current 250mA. | ||
* When the battery voltage under-voltage (3.3V) or enter limiting / boost output short circuit protection, enter standby mode. | * When the battery voltage under-voltage (3.3V) or enter limiting / boost output short circuit protection, enter standby mode. | ||
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| − | ==Power detection== | + | ===Power detection=== |
* Make sure the switch is in the OUT, after access to the battery, press button switch on the built-in battery detection; and through the four LED indicator for battery indicator, battery indicator after 3 ~ 5S closed. | * Make sure the switch is in the OUT, after access to the battery, press button switch on the built-in battery detection; and through the four LED indicator for battery indicator, battery indicator after 3 ~ 5S closed. | ||
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| − | ==Standby== | + | ===Standby=== |
* (Standby circuit is disconnected UPIN27 the GND and BM can be controlled within the overall power consumption of 30uA) | * (Standby circuit is disconnected UPIN27 the GND and BM can be controlled within the overall power consumption of 30uA) | ||
* Make sure the switch is in the OUT, if any action after accessing the battery, then the default is in standby mode. | * Make sure the switch is in the OUT, if any action after accessing the battery, then the default is in standby mode. | ||
Revision as of 10:11, 20 January 2014
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Microduino-BM module is an integrated single-cell Li-ion battery charge management, power detection and LED indication, the boost to 5V output, LDO to 3.3V output of discharge management module.
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ContentsFeatures
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Specifications
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Charging
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Discharge
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Power detection
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Standby
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Documents
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Development
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ApplicationsWhen viewing the board with the battery connector and switches closest to you, with the component side up, the battery connector positive (+) pin is on the left and the ground (-) pin is on the right. The pushbutton switch is on the left and the mode switch (IN = Charge, lever to the left; OUT = Discharge, lever to the right) is on the right. After connecting the battery you must momentarily push the pushbutton switch to start the converter. You can stop the converter/turn off the power by unplugging the battery or by pressing and holding the pushbutton for a few seconds. To use the battery to generate +5 VDC and +3.3 VDC, set the mode switch (to the right of the battery connector when viewed as described above) to OUT (switch lever away from the battery connector). The IN position is used for charging the battery from an external 5VDC, >=600 mA source. The charging current is 500 mA, so I recommend a battery with at least 500 mAH of capacity to avoid charging at a rate >1C. A rough English translation of the charging process is as follows:
The LED indications seem to be as follows, based on how Google Translate translates the Chinese datasheet for the HOTCHIP HT4901 at http://www.hotchip.com.cn/DownFiles/20131126090806453.pdf Discharge Mode
Charge Mode
Be prepared to terminate the charging process immediately when all four LEDs are on and steady. Overcharging lithium-type batteries may result in a nasty fire. I don't know how good the HT4901 is at detecting that the charging process is complete and shutting off the charging current to the battery. Hope I correctly translated this information. /Chip
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Pictures
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HistoryNovember 14, 2013 new release, major improvements:
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