Description
MH-CD42 DC 5V 2.1A Mobile Power Diy Board 4.2V Charge/Discharge(boost)/battery protection/indicator module 3.7V lithium 18650
Product Parameters
Charging voltage: DC4.5V-5.5V (recommended DC5V)
Charging current: 0-2.1A
Charging quiescent current: 100uA
Full voltage: 4.2V ± 1%
Discharge current: 0-3.5A
Discharge quiescent current: 50uA
Discharge efficiency: up to 96%
Output voltage: 5V
Output current: 0-2.1A
Ambient temperature: -20~+85°C
The module comes with a lithium battery protection function (for lithium batteries without protection, with protection board)
Overcurrent protection (OCP)
Overvoltage protection (OVP)
Short circuit protection (SCP)
Over temperature protection (OTP)
Charge and discharge power level 4 interval indication
Pin Description
VIN: The correct input of the charging port + (DC4.5V-5.5V (recommended DC 5V)
GND: negative input of the charging port -
GND: Lithium battery -
BAT: Lithium battery +
GND: Output negative output -
VOUT: Output positive output +
KEY: Output enable trigger port (low pulse trigger)
Note
In the discharge mode (the charging mode KEY function is invalid), the KEY port is triggered once, and the output is turned on; the KEY port is continuously triggered twice, and the output is turned off.
When the load is first connected, the output will be automatically turned on. If the small fish 50MA is loaded, the output will be turned off after 30 seconds; if the load is greater than 50MA, the output will be continuously turned on.
Allow one side to discharge while charging (Note: this is the output voltage >4.7/<5V)
Wiring Instructions
When the module is plugged in, the output will switch to external power supply (it will be powered off for 0.3s). When charging, the output voltage will be less than >4.7/<5V, depending on the charger load capacity!
Trigger mode: low level trigger (ground)
Connect to the single-chip microcomputer, if the connection is less than the load KEY, you can connect the single-chip microcomputer for about 20s to give a low level to keep the module working continuously.
Indicator Light
Applications
Car charging retrofit
Driving recorder power supply
Mobile power / charging treasure
Portable devices such as mobile phones and tablets
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Warm prompt:
Due to Ali shipping rules
when using differen logistics methods to purchase products,some shipping fee will be charged multiple times.
Please place order first and contact us to change the price.then we will inform you make the payment.Thank you!!
Dear buyer, Cainiao Super Economy Global is free but it could not be tracked since the parcel left China.( without a valid tracking number) ,please choose Standard category logistics if you want a full tracking info.
From 1 July 2021, AliExpress is required under the new EU e-Commerce VAT rules to collect VAT for orders at EUR 150 or less that are shipping from outside of EU to buyers located in EU at check-out. Such VAT collected orders shall be declared for customs with AliExpress IOSS number, this is to ensure that the goods can then be released for free circulation and delivered to you without being charged with VAT or any additional handling fees at the customs.
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