Difference between revisions of "Microduino-BM"

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{{Language|Microduino-BM}}
 
{| style="width: 800px;"
 
{| style="width: 800px;"
 
|-
 
|-
 
|
 
|
−
[[File:Microduino-BM-rect.jpg|400px|thumb|right|Microduino-BM]]
+
[[File:Microduino-bm-rect.jpg|400px|thumb|right|Microduino-BM]]
  
  
  
−
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.
+
'''[[Microduino-BM]]''' is a discharging module which combines a single-cell Li-ion battery charge management,  
 +
power detection and LED indication. The output voltage is 5V, and LDO is 3.3V output, providing the outstanding battery management for the Microduino-Core module.  
  
  
  
  
 +
|-
 +
|
 
==Features==
 
==Features==
−
    * Charge and discharge management, power detection, 5v boost, 3.3v LDO highly integrated;
+
*Support UPS(Uninterrupted Power Supply).
−
    * DIP switch gear charging and discharging, a key to open, hibernation module;
+
* Integrate lithium battery charge/discharge management, power detection, 5v output, 3.3v LDO.
−
    * Small, cheap, stack, open;
+
* Small,stackable, and economic.
−
    * Unified Microduino interface specification, and rich peripheral modules can be easily and flexibly with other eligible Microduino interface specification modules, sensors for quick connection and expansion;
+
* With a uniform Microduino interface standard and rich peripheral modules, it can easily connect with other Microduino modules and sensors.
−
    * 2.54 pitch row female connector for easy integration into breadboard.
+
* 2.54mm (0.1 inch) pin pitch, compatible with bread boards and pegboards.
 +
 
 +
|-
 +
|
  
 
==Specifications==
 
==Specifications==
−
    * First, let's look at the interface of the module:
+
===Interface===
−
        * A key switch
+
** A two-notch toggle switch to control the output voltage (5v and 3.3v);
−
        * A two tranches DIP switch gear
+
**A MicroUSB interface for power charging. 
−
        * One pair of 2.54 battery interface ("+" then the battery positive, "-" then the battery negative)
+
**A 1.27-pitch battery interface;
−
        * UPIN27 on the role of interface has 5V, 3V3, GND:
+
** UPIN27 contains the 5V, 3V3 and GND interface; (The analog voltage detection of BM can be selected between A6 and A7, and the digital low voltage will be output to D2 interface. Please don’t rely protection circuit to protect the battery, which only works in extreme circumstance. You can use mcu to detect the voltage of the battery and then judge the battery’s charge. ) 
  
−
==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.
 
−
    * Note:
 
−
        * Always follow the charging process: make sure switch to OUT, plug in the battery, charging access external 5V power supply, the switch in the IN, start charging, charging is completed, the switch to OUT, unplug the external 5V Charge power.
 
−
        * Recommended charging power supply: Voltage 5v, current 600ma above;
 
−
        * Not add pressure drop impact elements (diodes) in the charging circuit, so as not to reach the charging voltage,
 
−
thereby affecting the charging current.
 
  
−
==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.
+
|
−
    Close * When the battery voltage under-voltage (3.3V) or enter limiting / boost output short circuit protection, enter standby mode.
 
−
    * Note:
 
−
        * Make sure the switch is in the OUT and then start boost output;
 
−
        * please do not toggle switch in Battery-powered process.
 
  
−
==Power detection==
+
===Charging===
−
    * 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.
+
*Plug in MicroUSB and charge the lithium battery with the current of 600ma.
 +
*The indicator goes on when charging and goes out after finishing.
  
−
==Standby==
 
−
    * (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.
 
−
    * When you've turned on discharge mode by pressing the button switch (3s above) to enter standby mode.
 
−
    * Intelligent Detection: No charge input, no discharge output (<10mA) within three minutes into standby mode.
 
  
 +
|-
 +
|
  
 +
===Discharging===
 +
*When you plug in MicroUSB, the 5v or 3.3v voltage is powered through MicroUSB. Otherwise, the voltage will be supplied by the lithium battery. Meantime, you need to pull the power output switch to “ON”. If it is not started, please plug in MicroUSB to activate and then try again.
 +
*The indicator goes on when there is electricity output, otherwise, it goes out.
 +
*5V offers 1a electricity output and 3.3V offers 700ma output. 
  
 +
|-
 +
|
 +
 +
===Low-voltage Battery Protection===
 +
{|class="wikitable"
 +
|-
 +
| Undervoltage indication|| 3.60V
 +
|-
 +
| Low-voltage protection ||2.40V
 +
|-
 +
|Indicator-off voltage when the voltage gets back.||3.71V
 +
|}
 +
 +
Low voltage indicator goes on under 3.60V and when the voltage keeps decreasing to 2.40V, the lithium battery protection circuit works. The indicator will go out when the battery is powered to 3.71V.
 +
 +
 +
===Short-circuit Protection===
 +
When the output current reaches '''1.2A''', the lithium battery protection circuit starts and cuts off power supply. The circuit will be activated and get back to work only when you plug in MicroUSB to charge. '''
 +
 +
===Efficiency of BM and Its Load Driven Capacity===
 +
100ma 5.05v output:
 +
{|class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|'''Input voltage'''
 +
| align="center" style="background:#f0f0f0;"|'''4.2'''
 +
| align="center" style="background:#f0f0f0;"|'''4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.8'''
 +
| align="center" style="background:#f0f0f0;"|'''3.6'''
 +
| align="center" style="background:#f0f0f0;"|'''3.4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.2'''
 +
| align="center" style="background:#f0f0f0;"|'''3'''
 +
| align="center" style="background:#f0f0f0;"|'''2.8'''
 +
|-
 +
| Input current||139||148||156||166||178||190||204||220
 +
|-
 +
| Efficiency||86.50%||85.30%||85.20%||84.50%||83.40%||83.10%||82.50%||82.00%
 +
|}
 +
 +
300ma 5.05v output:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|'''Input voltage'''
 +
| align="center" style="background:#f0f0f0;"|'''4.2'''
 +
| align="center" style="background:#f0f0f0;"|'''4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.8'''
 +
| align="center" style="background:#f0f0f0;"|'''3.6'''
 +
| align="center" style="background:#f0f0f0;"|'''3.4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.2'''
 +
| align="center" style="background:#f0f0f0;"|'''3'''
 +
| align="center" style="background:#f0f0f0;"|'''2.8'''
 +
|-
 +
| Input current||411||437||460||492||525||570||615||679
 +
|-
 +
| Efficiency||87.80%||87.10%||86.90%||85.40%||84.70%||82.90%||81.50%||79.70%
 +
|}
 +
500ma 5.05v output:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|'''Input voltage'''
 +
| align="center" style="background:#f0f0f0;"|'''4.2'''
 +
| align="center" style="background:#f0f0f0;"|'''4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.8'''
 +
| align="center" style="background:#f0f0f0;"|'''3.6'''
 +
| align="center" style="background:#f0f0f0;"|'''3.4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.2'''
 +
| align="center" style="background:#f0f0f0;"|'''3'''
 +
| align="center" style="background:#f0f0f0;"|'''2.8'''
 +
|-
 +
| Input current||706||746||800||863||938||1028||1157
 +
|-
 +
| Efficiency||85.20%||84.60%||83.10%||81.30%||79.20%||76.80%||72.70%||
 +
|}
 +
700ma 5.05v output:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|'''Input voltage'''
 +
| align="center" style="background:#f0f0f0;"|'''4.2'''
 +
| align="center" style="background:#f0f0f0;"|'''4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.8'''
 +
| align="center" style="background:#f0f0f0;"|'''3.6'''
 +
| align="center" style="background:#f0f0f0;"|'''3.4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.2'''
 +
| align="center" style="background:#f0f0f0;"|'''3'''
 +
| align="center" style="background:#f0f0f0;"|'''2.8'''
 +
|-
 +
| Input current||1025||1104||1189||1313||1510
 +
|-
 +
| Efficiency||82.10%||80.00%||78.20%||74.80%||68.90%
 +
|}
 +
1A 5.05v output:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|'''Input voltage'''
 +
| align="center" style="background:#f0f0f0;"|'''4.2'''
 +
| align="center" style="background:#f0f0f0;"|'''4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.8'''
 +
| align="center" style="background:#f0f0f0;"|'''3.6'''
 +
| align="center" style="background:#f0f0f0;"|'''3.4'''
 +
| align="center" style="background:#f0f0f0;"|'''3.2'''
 +
| align="center" style="background:#f0f0f0;"|'''3'''
 +
| align="center" style="background:#f0f0f0;"|'''2.8'''
 +
|-
 +
| Input current||1622||1842
 +
|-
 +
| Efficiency||74.10%||68.50%
 +
|}
 +
 +
[[file:Micrmodule-BM-Analysis.jpg|thumb|600px|center|image]]
 +
 +
We can see from data above that BM’s 5v output shows excellent transfer efficiency no matter under low or high power output. The load driven capacity of that can reach 1A. The 3.3v transferring efficiency depends on the 1117 chip, which should be around 60% and the load driven capacity can reach up to 600ma. 
 +
 +
===Temperature Rise of System Operation===
 +
Temperature rise under 5v output and 30 ℃ indoor:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''3-minute '''
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''5-minute '''
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''10-minute '''
 +
|-
 +
| Current||300||500||700||300||500||700||300||500||700
 +
|-
 +
| Temperature||32||35.8||46||32.7||40||48||32.7||40||51
 +
|}
 +
Temperature rise under 3.3v output and 26 ℃ indoor:
 +
{| class="wikitable"
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''3-minute'''
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''5-minute'''
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|
 +
| align="center" style="background:#f0f0f0;"|'''10-minute'''
 +
|-
 +
| Current||100||300||500||300||500||700||300||500||700
 +
|-
 +
| Temperature||27.5||32||40||28.5||35||44||28.5||38||49
 +
|}
  
  
 
==Documents==
 
==Documents==
−
* Snapshot of '''[[Microduino-BM]]''' schematic
+
Eagle PCB '''[[File:Microduino-BM.zip]]''
−
:[[file:Microduino-BM-SCH.png|600px|thumb|left|Microduino-BM Schematic]]
+
 
−
<br style="clear: left"/>
 
−
:[[file:Microduino-BM-PCB.png|600px|thumb|left|Microduino-BM PCB]]
 
−
<br style="clear: left"/>
 
−
* '''[[Microduino-BM]]''' Eagle source file 【'''[[media:Microduino-BM.zip|download]]'''】
 
−
* '''[[Microduino-BM]]''' main chips and devices
 
  
−
:[[file:Micromodule-BM-1.png|800px|thumb|left|Microduino-BM-Pinout]]
 
−
<br style="clear: left"/>
 
−
:[[file:Micromodule-BM-2.png|800px|thumb|left|Microduino-BM-Pinout]]
 
 
<br style="clear: left"/>
 
<br style="clear: left"/>
 +
'''Main components'''
  
 +
*Chip 1: HT4901 HT4901 Application guidelines [[Media: HT4901 Application guidelines V1.1.pdf]]
 +
*Chip 2: LP2985AIM5X-3.3  [[Media:LP2985.pdf]]
 +
*MOSFET: AO3400 [[Media:AO3400.pdf]]
 +
*Schottky diodes: MBR0520  [[Media:MBR0520.pdf]]
 +
*Toggle switch: MSK-12C01 (1P2T) [[Media:MSK-12C01(1P2T).pdf]].
  
 
|-
 
|-
Line 72: Line 205:
  
 
==Development==
 
==Development==
 +
 +
*Battery: single-cell 3.7v li-ion battery;
 +
*Recommended battery module is connected with 2PIN DuPont;
 +
*Recommended power options: voltage 5V, current 600ma above, such as: computer USB, 5V phone charger.
 +
 +
 
|-
 
|-
 
|
 
|
  
 
==Applications==
 
==Applications==
−
|-
+
 
−
|
+
*Lithium battery charge 
 +
*Lithium battery voltage boosting to power Microduino core modules
 +
 
 
==Pictures==
 
==Pictures==
−
[[file:Micrmodule-BM-T.jpg|thumb|600px|center|Micrmodule BM Front]]
+
[[file:Micrmodule-bm-t.jpg|thumb|600px|center|Micrmodule BM Front]]
−
[[file:Micrmodule-BM-B.jpg|thumb|600px|center|Micrmodule BM Back]]
+
[[file:Micrmodule-bm-b.jpg|thumb|600px|center|Micrmodule BM Back]]
  
 
|-
 
|-
 
|
 
|
 +
 +
==FQA==
  
 
==History==
 
==History==
 +
November 14, 2013 new release, major improvements:
 +
*Canceled VMOT pin, use the toggle switch directly and use the 5V port switching charge and discharge;
 +
*Boost pushbutton can fully control the boost, UPIN27 the GND loop off.
 +
*March 13, 2013 Batch completed.
 +
*March 1, 2013 20130202 edition model released, testing is no big problem.
 +
*February 2, 2013, using mobile power ASIC chip, re-layout.
 +
*December 31, 2012, released the test panels, the main problems are:
 +
*No 5V output;
 +
*Battery Interface leakage;
 +
*No power display.
  
 
|}
 
|}

Latest revision as of 08:35, 17 November 2015

Language: English  • 中文
Microduino-BM


Microduino-BM is a discharging module which combines a single-cell Li-ion battery charge management, power detection and LED indication. The output voltage is 5V, and LDO is 3.3V output, providing the outstanding battery management for the Microduino-Core module.



Features

  • Support UPS(Uninterrupted Power Supply).
  • Integrate lithium battery charge/discharge management, power detection, 5v output, 3.3v LDO.
  • Small,stackable, and economic.
  • With a uniform Microduino interface standard and rich peripheral modules, it can easily connect with other Microduino modules and sensors.
  • 2.54mm (0.1 inch) pin pitch, compatible with bread boards and pegboards.

Specifications

Interface

    • A two-notch toggle switch to control the output voltage (5v and 3.3v);
    • A MicroUSB interface for power charging.
    • A 1.27-pitch battery interface;
    • UPIN27 contains the 5V, 3V3 and GND interface; (The analog voltage detection of BM can be selected between A6 and A7, and the digital low voltage will be output to D2 interface. Please don’t rely protection circuit to protect the battery, which only works in extreme circumstance. You can use mcu to detect the voltage of the battery and then judge the battery’s charge. )


Charging

  • Plug in MicroUSB and charge the lithium battery with the current of 600ma.
  • The indicator goes on when charging and goes out after finishing.


Discharging

  • When you plug in MicroUSB, the 5v or 3.3v voltage is powered through MicroUSB. Otherwise, the voltage will be supplied by the lithium battery. Meantime, you need to pull the power output switch to “ON”. If it is not started, please plug in MicroUSB to activate and then try again.
  • The indicator goes on when there is electricity output, otherwise, it goes out.
  • 5V offers 1a electricity output and 3.3V offers 700ma output.

Low-voltage Battery Protection

Undervoltage indication 3.60V
Low-voltage protection 2.40V
Indicator-off voltage when the voltage gets back. 3.71V

Low voltage indicator goes on under 3.60V and when the voltage keeps decreasing to 2.40V, the lithium battery protection circuit works. The indicator will go out when the battery is powered to 3.71V.


Short-circuit Protection

When the output current reaches 1.2A, the lithium battery protection circuit starts and cuts off power supply. The circuit will be activated and get back to work only when you plug in MicroUSB to charge.

Efficiency of BM and Its Load Driven Capacity

100ma 5.05v output:

Input voltage 4.2 4 3.8 3.6 3.4 3.2 3 2.8
Input current 139 148 156 166 178 190 204 220
Efficiency 86.50% 85.30% 85.20% 84.50% 83.40% 83.10% 82.50% 82.00%

300ma 5.05v output:

Input voltage 4.2 4 3.8 3.6 3.4 3.2 3 2.8
Input current 411 437 460 492 525 570 615 679
Efficiency 87.80% 87.10% 86.90% 85.40% 84.70% 82.90% 81.50% 79.70%

500ma 5.05v output:

Input voltage 4.2 4 3.8 3.6 3.4 3.2 3 2.8
Input current 706 746 800 863 938 1028 1157
Efficiency 85.20% 84.60% 83.10% 81.30% 79.20% 76.80% 72.70%

700ma 5.05v output:

Input voltage 4.2 4 3.8 3.6 3.4 3.2 3 2.8
Input current 1025 1104 1189 1313 1510
Efficiency 82.10% 80.00% 78.20% 74.80% 68.90%

1A 5.05v output:

Input voltage 4.2 4 3.8 3.6 3.4 3.2 3 2.8
Input current 1622 1842
Efficiency 74.10% 68.50%
image

We can see from data above that BM’s 5v output shows excellent transfer efficiency no matter under low or high power output. The load driven capacity of that can reach 1A. The 3.3v transferring efficiency depends on the 1117 chip, which should be around 60% and the load driven capacity can reach up to 600ma.

Temperature Rise of System Operation

Temperature rise under 5v output and 30 ℃ indoor:

3-minute 5-minute 10-minute
Current 300 500 700 300 500 700 300 500 700
Temperature 32 35.8 46 32.7 40 48 32.7 40 51

Temperature rise under 3.3v output and 26 ℃ indoor:

3-minute 5-minute 10-minute
Current 100 300 500 300 500 700 300 500 700
Temperature 27.5 32 40 28.5 35 44 28.5 38 49


Documents

Eagle PCB 'File:Microduino-BM.zip



Main components

Development

  • Battery: single-cell 3.7v li-ion battery;
  • Recommended battery module is connected with 2PIN DuPont;
  • Recommended power options: voltage 5V, current 600ma above, such as: computer USB, 5V phone charger.


Applications

  • Lithium battery charge
  • Lithium battery voltage boosting to power Microduino core modules

Pictures

Micrmodule BM Front
Micrmodule BM Back

FQA

History

November 14, 2013 new release, major improvements:

  • Canceled VMOT pin, use the toggle switch directly and use the 5V port switching charge and discharge;
  • Boost pushbutton can fully control the boost, UPIN27 the GND loop off.
  • March 13, 2013 Batch completed.
  • March 1, 2013 20130202 edition model released, testing is no big problem.
  • February 2, 2013, using mobile power ASIC chip, re-layout.
  • December 31, 2012, released the test panels, the main problems are:
  • No 5V output;
  • Battery Interface leakage;
  • No power display.
Retrieved from "https://wiki.microduinoinc.com/index.php?title=Microduino-BM&oldid=614"