1. Product overview 1.1 High precision voltage detection circuit

? Overcharge detection voltage: 4.25V, accuracy ±25mV

? Overcharge recovery hysteresis voltage: 100mV

? Overdischarge detection voltage: 2.80V, accuracy ±8 0mV

? Overdischarge recovery hysteresis voltage: 200mV

? Disconnection detection voltage: 1.20V, accuracy ±100mV

? Disconnection recovery hysteresis voltage: 100mV

? Balanced detection voltage: 4.15V, accuracy ±25mV

? Level 1 discharge overcurrent detection voltage: 100mV, accuracy ±10mV

? Level 2 discharge overcurrent detection voltage: 200mV, accuracy ±20mV (2

times

1

stage discharge overcurrent detection voltage)

? Load short-circuit detection voltage: 500mV, accuracy ±50mV (5

times

1

stage discharge overcurrent detection voltage)

? Charge overcurrent detection voltage: 20mV, accuracy ±6mV

1.2 The charging and discharging over-temperature protection threshold and charging low-temperature protection threshold can be set by external resistors

1.3 The protection delay time of CUV, DOC1 and DOC2 can be set by external pins

1.4 Low current consumption

? Working mode: typ. 25μA

? Sleep mode: 2μA maximum

? Shutdown mode: 2μA maximum

1.5 Support multi-chip cascade application

1.6 Electronic lock function

1.7 Alarm signal output

1.8 Package: LQFP-32L

5. 5.1 VCx Input Resistor and Capacitor Selection

The selection of VCx input resistance is related to the balance. When using external balance, the input resistance of VCx is recommended to use 1KΩ;

When using internal equalization, the input resistance value of VCx is recommended to be greater than 50Ω. The input resistance of VC1~VC10 needs to be selected

same resistance.

The input capacitor and input resistor form an RC filter circuit to suppress the spikes on the VCx pin. VC1~VC7

X7R ceramic capacitors of 47~220nF/50V are recommended. The input capacitors of VC8~VC10 work at higher direct

Under the current bias voltage, if a ceramic capacitor with a withstand voltage of 50V is used, its actual effective capacitance will decrease. It is recommended to use 100V

Voltage-resistant ceramic capacitors.

5.2 Selection of VCC Input Resistance and Input Capacitor

VCC needs to be powered from the highest battery, and the input resistance should be as small as possible. The recommended resistance value is 200Ω.

The diode and capacitor at the VCC input can maintain the normal operation of the chip when the battery pack voltage is momentarily powered down.

The input capacitors are recommended to use 4.7μF/100V and 100nF/100V ceramic capacitors in parallel.

5.3 Selection of LDO Output Capacitors

The output capacitor of LDO output VREF is recommended to use 100nF~1μF/16V ceramic capacitor. The LDO outputs

The current output capability is weak, so it is not recommended to be used as a driving power supply for LEDs. The driving power of LED can be through Source Follow

Take power from P+.