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Protection Circuit Module (PCB) for 3.7V Li-Ion Battery (3A limit) with I2C (#1263)

Your Price: RFQ
Lead Time: 6-8 weeks

Product ID # 1263
Part Number:

 Protection Circuit Board Specifications  For 3.6V/3.7V Li-ion/Li-po Battery Pack 
Model: PCB-S1A3-I2C  IC (BQ27541), I2C
No. Test   item Criterion
1 Voltage Charging voltage DC: 4.2V CC/CV
Balance voltage for single cell N/A
2 Current Normal operating-mode current: Gas Gauge in NORMAL mode,ILOAD > Sleep Current 150μA
SLEEP operating-mode current: Gas Gauge in SLEEP mode,ILOAD < Sleep Current 80μA
FULL SLEEP operating-mode current: Gas Gauge in FULL SLEEP mode,ILOAD < Sleep Current 250μA
Maximal continuous Charging current 3A
Maximal continuous discharging current 3A
3 Over charge Protection
(single cell)
Over charge detection voltage 4.25±0.025V
Over charge detection delay time 0.5S-2.0S
Over charge release voltage 4.05±0.05V
4 Over discharge protection
(single cell)
Over discharge detection voltage 2.50±0.07V
Over discharge detection delay time 10-30mS
Over discharge release voltage 3.0±0.1V
5 Over current protection Over current detection voltage 0.2V±0.015V
Over current detection current 5±1A
Detection delay time   5ms-20ms
Release condition Cut load
6 Short protection Detection condition Exterior short circuit
Detection delay time 100-600us
Release condition Cut load
7 Resistance Protection  circuitry(B- TO P-) ≤50mΩ
8 Temperature Operating Temperature Range -40~+85℃
Storage Temperature Range -40~+125℃
9 Weight  
10 Dimenstion LxWxT 56 x 5 x 3 mm
11 Specification in pdf file Download the specification  

Notes: Customer can not program the board, we will preset the board according to your battery's specification.

What we need to know from you?
1. Cell's manufacturer and module number
2. How many in series and parallel
3. What is the capacity of battery pack
4. Maximum continuous discharge current
5. Maximum surge discharge current
6. SMBus or RS485 or RS232

For other PCM/PCB, please check our PCM/PCB/BMS/CMB/UPS category


  • If you want to use this protection circuit board for a battery that is less than the rated drain, you must add additional protection device to protect the battery itself. Such as: proper rated polyswitch. 
  • You must be professional in Lithium battery pack to buy the protection circuit board. Misusing may cause battery damage or explode. We are not responsible for any damage caused by user.

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