Nisshinbo Micro Devices R5449Z206NE

The R5449Z is 1-Cell Li-Ion / Polymer battery protection IC providing detector circuits for overcharge, overdischarge, discharge / charge overcurrent, and temperature. The IC can drive external high-side N-channel MOSFETs and provides a high-accuracy detection at overcharge and overcurrent, and a high-accuracy charge inhibition for 0V battery. Furthermore, the IC can reduce the supply current after overdischarge detection to a minimum by stopping the internal circuits. Using the additional CTL pin can force the IC into standby mode.

Key features

• High-side N-channel MOSFETs
• Additional input for temperature sensor
• Additional input to force standby mode
• High performance battery protection IC

Additional features

• Absolute maximum rating: 6.5 V
• Supply surrent normal mode: Typ.5.0 μA
• Standby current: Max.0.04 μA
   
• Detector selectable range and accuracy
  • Overcharge detection voltage: 4.2 V to 4.6 V (in 0.005 V step, ±10 mV (1))
  • Overdischarge detection voltage (VDET2): 2.0 V to 3.4 V (in 0.005 V step, ±35 mV)
  • Discharge overcurrent detection voltage (VDET3): 0.012 V to 0.150 V (in 0.001 V step)
  • Charge overcurrent detection voltage: −0.150 V to −0.012 V (in 0.001 V step)
  • Short-circuit detection voltage (VSHORT): 0.032 V to 0.200 V (in 0.005V step, ±3 mV)
  • VSHORT configurable range varies depending on a set value for VDET3.
  • 0 V battery charge inhibition voltage: 1.25 V to 2.00 V (in 0.05V step, ±50 mV)
  • Thermal detection temperature: 40°C to 85°C (in 5°C step, ±3°C)
     
• Internal fixed output delay time
  • Overcharge detection delay time: 1024 ms / 2048 ms / 3072 ms / 4096 ms
  • Overdischarge detection delay time: 16 ms / 32 ms / 128 ms
  • Discharge overcurrent detection delay time: 32 ms / 128 ms / 256 ms / 512 ms / 1024 ms
  • Short-circuit detection delay time: 280 μs
  • Charge overcurrent detection delay time: 8 ms
  • Thermal detection delay time: 128 ms / 512 ms / 1024 ms / 4096 ms
  • Thermal release delay time: 128 ms
     
• Optional functions
  • Charge overcurrent detection: Enabled/Disabled
  • 0 V battery charging: Inhibition
  • Overcurrent detection: High-side (RSENS to V+)
  • Thermal protection: Charge and discharge current
  • External NTC thermistor: 100 kΩ/470 kΩ
  • Temperature monitoring cycle: Non-sense time (TTNS): 90 ms / 528 ms / 1040 ms, Sense Time (TTS): 10 ms
  • Current sense: Resistor / FET

Applications

• Battery pack
• Smart-phones
• Other electronic gadgets