Nisshinbo R5651T Battery Protection IC

Nisshinbo R5651T Battery Protection IC is an overcharge and discharge protection IC for 3-to 5- series cell Li-ion and Li-polymer rechargeable battery packs. The R5651T includes short-circuit and protection circuits for charge and discharge overcurrent. The number of cells supported by the R5651 is selected by adjusting the voltage on the SEL pin. An integrated NTC thermister provides temperature protection.

The Nisshinbo R5651T Battery Protection IC is available in a compact TSSOP-24 package with a -40°C to +125°C junction temperature range.

Features

4.0V to 25.0V operating input voltage (30V maximum)
Support for 3 to 5 cells
13.0µA supply current
6.0µA standby current
3.6V to 4.5V overcharge detection voltage in 0.005V steps
±25mV overcharge detection voltage accuracy
1.0s overcharge detection delay time
2.0V to 3.2V over-discharge detection voltage in 0.005V steps
±50mV over-discharge detection voltage accuracy
Over-discharge detection delay time set by an external capacitor
Discharge overcurrent detection voltage
- V_DET3-1: 0.01V to 0.15V in 0.005V steps
- V_DET3-2: 0.03V to 0.45V in 0.005V steps
Discharge overcurrent detection voltage accuracy
- V_DET3-1: ±3mV (0.01V to 0.03V), ±10% (0.035V to 0.15V)
- V_DET3-2: ±8mV (0.03V to 0.08V), ±10% (0.09V to 0.345V)
Discharge overcurrent detection delay time
- V_DET3-1: Set by external capacitor
- V_DET3-2: tV_DET3-1 x 1/10, t_VDET3-1 x 1/20

-0.050V to -0.008V charge overcurrent detection voltage in 0.005V steps
Charge overcurrent detection voltage accuracy
- ±10% (-0.050V to -0.030V)
- ±3mV (-0.030V to -0.008V)
512ms, 1024ms, and 2560ms charge overcurrent detection delay time
0.1V to 0.6V short detection time in 0.02V steps
±30% short detection voltage accuracy
330µs short detection delay time
Conditions for overcharge restoration: Auto release
Conditions for over-discharge restoration: Auto release
0V battery charging inhibition voltage: 1.1V, 1.3V, ±0.2V accuracy
Temperature protection by NTC thermistor
- Charge High setting: +45°C, +50°C, +55°C, +60°C, ±3°C
- Charge Low setting: -5°C, -3°C, 0°C, ±3°C
- Discharge High setting: +65°C, +70°C, +75°C, ±3℃
-40°C to +125°C junction temperature range
7.8mm x 6.4mm x 0.9mm TSSOP-24

Applications

Scooters and e-bikes
Robot vacuum cleaners
Portable electronics

Heat insulation boxes
Power tools

Nisshinbo R5651T Battery Protection IC

Features

Applications

Typical Application Circuit

Block Diagram

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