Product Overview
SNT-8A (PH008-A)
WLP-8V (HV008-A)Charge / Discharge overcurrent detection voltage accuracy: ±1 mV (S-821AA) ｜ ±0.75 mV (S-821BA)
This IC is high-side protection IC for lithium-ion / lithium polymer rechargeable batteries, which includes high-accuracy voltage detection circuit, delay circuit, and triple boost charge pump to drive an external charge / discharge FET. It is suitable for protecting 1-cell lithium-ion / lithium polymer rechargeable battery packs from overcharge, overdischarge, and overcurrent.
By using an external overcurrent detection resistor, this IC realizes high-accuracy overcurrent protection with less effect from temperature change.
Features
- High-accuracy voltage detection circuit
- Overcharge detection voltage: 3.500 V to 4.800 V (5 mV step) Accuracy ±15 mV
- Overcharge release voltage: 3.100 V to 4.800 V*1 Accuracy ±50 mV
- Overdischarge detection voltage: 2.000 V to 3.000 V (10 mV step) Accuracy ±50 mV
- Overdischarge release voltage: 2.000 V to 3.400 V*2 Accuracy ±75 mV
- Discharge overcurrent 1 detection voltage: -3 mV to -100 mV (0.25 mV step) Accuracy ±0.75 mV
- Discharge overcurrent 2 detection voltage: -6 mV to -100 mV (0.5 mV step) Accuracy ±2 mV
- Load short-circuiting detection voltage: -20 mV to -100 mV (1 mV step) Accuracy ±4 mV
- Charge overcurrent detection voltage: 3 mV to 100 mV (0.25 mV step) Accuracy ±0.75 mV
- 0 V battery charge inhibition battery voltage: 1.45 V to 2.00 V*3 (50 mV step) Accuracy ±50 mV
- Overheat detection function
- Available, unavailable
- High-accuracy temperature detection circuit with an external NTC thermistor (Resistance: 100 kΩ ±1% or 470 kΩ ±1% at 25°C, B-constant: ±1%)
- Overheat detection temperature +65°C to +85°C (5°C step) Accuracy ±3°C
- Overheat release temperature +55°C to +80°C (5°C step)*4 Accuracy ±5°C
- Internal charge pump
- Triple boost (regulation voltage = VDD + 4.2 V)
- Detection delay times are generated only by an internal circuit (external capacitors are unnecessary).
- Discharge overcurrent control function
- Release condition of discharge overcurrent status: Load disconnection, charger connection
- 0 V battery charge
- Enabled, inhibited
- Power-down function
- Available, unavailable
- Power-saving function
- Available, unavailable
- PS pin internal resistance connection
- In normal status: Pull-up, pull-down
- In power-saving status: Pull-up, pull-down
- PS pin internal resistance value
- 1 MΩ to 10 MΩ (1 MΩ step)
- PS pin control logic
- Active "H", active "L"
- High-withstand voltage
- VM pin, CO pin and DO pin: absolute maximum rating 28 V
- Wide operation temperature range
- Ta = -40°C to +85°C
- Low current consumption
- During operation: 6.0 μA typ., 10 μA max. (Ta = +25°C)
- During power-down: 50 nA max. (Ta = +25°C)
- During overdischarge: 1.0 μA max. (Ta = +25°C)
- During power-saving: 50 nA max. (Ta = +25°C)
- Lead-free, Sn100%, halogen-free
*1. Overcharge release voltage = Overcharge detection voltage - Overcharge hysteresis voltage
(Overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.4 V in 50 mV step)
*2. Overdischarge release voltage = Overdischarge detection voltage + Overdischarge hysteresis voltage
(Overdischarge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.7 V in 100 mV step)
*3. Overdischarge detection voltage - 0.25 V ≥ 0 V battery charge inhibition battery voltage
*4. Overheat release temperature = Overheat detection temperature - 5°C or 10°C
Applications
- Lithium-ion rechargeable battery pack
- Lithium polymer rechargeable battery pack