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Lithium Battery Management IC
SIT8997A/B/C-Lithium battery protection IC
6/7 series lithium battery protection series
SIT8997 has built-in high-precision voltage detection circuit and delay circuit to monitor voltage, current and temperature to ensure the safety of the pack. In addition, SIT8997 has a 0V charging function to increase the service life of the pack.
SIT8997 has three working modes: normal mode, sleep mode and shutdown mode. When any battery cell is in a low capacity state,
SIT8997 enters sleep mode to reduce system power consumption.
SIT8997 has three working modes: normal mode, sleep mode and shutdown mode. When any battery cell is in a low capacity state,
SIT8997 enters sleep mode to reduce system power consumption.
Hotline:138 2870 3807
Description
1 Overview
SIT8997 has built-in high-precision voltage detection circuit and delay circuit to monitor voltage, current and temperature to ensure the safety of the pack. In addition, SIT8997 has a 0V charging function to increase the service life of the pack.
SIT8997 has three working modes: normal mode, sleep mode and shutdown mode. When any battery cell is in a low capacity state,
SIT8997 enters sleep mode to reduce system power consumption.
2. Features
High-precision voltage detection function:
Overcharge protection voltage VOV: 3.200V-4.400V (gear 25mV)
Overcharge protection voltage accuracy: ±15mV Hysteresis voltage: 0-400mV
Over-discharge protection voltage VUV: 2.0V-3.6V (100mV gear)
Over-discharge protection voltage accuracy: ±30mV
Over-discharge protection release hysteresis voltage: 0-1.6V
Discharge overcurrent detection function:
Overcurrent 1 protection voltage VDOC1: 0.025V-0.350V (gear 25mV)
Overcurrent 1 protection voltage accuracy: ±10mV
Overcurrent 2 protection voltage VDOC2: 2×VDOC1 (50mV gear)
Overcurrent 2 protection voltage accuracy: ±15mV short circuit detection function:
Short circuit protection voltage VSC: 4×VDOC1 (gear position 100mV)
Short circuit protection voltage accuracy: ±15mV
Charging overcurrent detection function:
Charge current protection voltage VCOC: 10mV – 50mV (10mV gear)
Charge overcurrent protection accuracy 10mV: ±5mV; 20mV-50mV: ±10mV
Disconnection detection function
Battery balance function
Balance threshold voltage: 3.2V-4.375V (25mV first gear) Balance threshold voltage accuracy: ±25mV
Temperature detection function:
Charging high temperature protection temperature: 50°C Charging high temperature protection temperature accuracy: ±4°C (Max.) Charging low temperature protection temperature: -5°C Charging low temperature protection temperature accuracy: ±4°C (Max.) Discharging high temperature protection temperature: 70° C Discharge high temperature protection temperature accuracy: ±4℃(Max.)
External capacitor sets over-discharge voltage protection delay, discharge over-current 1 protection delay and discharge over-current 2 protection delay
Overcharge voltage, overcharge current protection delay, short circuit protection delay and temperature protection delay are fixed
Operating voltage range: 3V-40V
Operating temperature range: -40℃~85℃
Integrated N-MOSFET driver
Low power design:
Normal working power consumption: 20 uA (Max.)
Sleep mode power consumption: 3 uA (Max.)
Package form: 20-pin TSSOP
SEL pin selection 6/7 string application
SIT8997 has built-in high-precision voltage detection circuit and delay circuit to monitor voltage, current and temperature to ensure the safety of the pack. In addition, SIT8997 has a 0V charging function to increase the service life of the pack.
SIT8997 has three working modes: normal mode, sleep mode and shutdown mode. When any battery cell is in a low capacity state,
SIT8997 enters sleep mode to reduce system power consumption.
2. Features
High-precision voltage detection function:
Overcharge protection voltage VOV: 3.200V-4.400V (gear 25mV)
Overcharge protection voltage accuracy: ±15mV Hysteresis voltage: 0-400mV
Over-discharge protection voltage VUV: 2.0V-3.6V (100mV gear)
Over-discharge protection voltage accuracy: ±30mV
Over-discharge protection release hysteresis voltage: 0-1.6V
Discharge overcurrent detection function:
Overcurrent 1 protection voltage VDOC1: 0.025V-0.350V (gear 25mV)
Overcurrent 1 protection voltage accuracy: ±10mV
Overcurrent 2 protection voltage VDOC2: 2×VDOC1 (50mV gear)
Overcurrent 2 protection voltage accuracy: ±15mV short circuit detection function:
Short circuit protection voltage VSC: 4×VDOC1 (gear position 100mV)
Short circuit protection voltage accuracy: ±15mV
Charging overcurrent detection function:
Charge current protection voltage VCOC: 10mV – 50mV (10mV gear)
Charge overcurrent protection accuracy 10mV: ±5mV; 20mV-50mV: ±10mV
Disconnection detection function
Battery balance function
Balance threshold voltage: 3.2V-4.375V (25mV first gear) Balance threshold voltage accuracy: ±25mV
Temperature detection function:
Charging high temperature protection temperature: 50°C Charging high temperature protection temperature accuracy: ±4°C (Max.) Charging low temperature protection temperature: -5°C Charging low temperature protection temperature accuracy: ±4°C (Max.) Discharging high temperature protection temperature: 70° C Discharge high temperature protection temperature accuracy: ±4℃(Max.)
External capacitor sets over-discharge voltage protection delay, discharge over-current 1 protection delay and discharge over-current 2 protection delay
Overcharge voltage, overcharge current protection delay, short circuit protection delay and temperature protection delay are fixed
Operating voltage range: 3V-40V
Operating temperature range: -40℃~85℃
Integrated N-MOSFET driver
Low power design:
Normal working power consumption: 20 uA (Max.)
Sleep mode power consumption: 3 uA (Max.)
Package form: 20-pin TSSOP
SEL pin selection 6/7 string application
Tel：138 2870 3807
Wechat：HLECSIT
Address：5 / F, building 1, yibaolai industrial town, Fuyong Fuhai street, Bao'an District, Shenzhen