Datasheet CN3165 (Consonance) - 7
| Fabricante | Consonance |
| Descripción | Complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer batteries |
| Páginas / Página | 13 / 7 — CONSONANCE. Application Information. Undervoltage Lockout (UVLO). Sleep … |
| Formato / tamaño de archivo | PDF / 443 Kb |
| Idioma del documento | Inglés |
CONSONANCE. Application Information. Undervoltage Lockout (UVLO). Sleep mode. Precharge mode
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CONSONANCE
Figure 4 Charging Profile
Application Information Undervoltage Lockout (UVLO)
An internal undervoltage lockout circuit monitors the input voltage and keeps the charger in shutdown mode until VIN rises above the undervoltage lockout voltage. The UVLO circuit has a built-in hysteresis of 0.12V.
Sleep mode
There is an on-chip sleep comparator. The comparator keeps the charger in sleep mode if VIN falls below sleep mode threshold(VBAT+10mv). Once in sleep mode, the charger will not come out of sleep mode until VIN rises 60mv above the battery voltage.
Precharge mode
At the beginning of a charge cycle, if the battery voltage is below 70% of the regulation voltage, the charger goes into precharge mode , and the charge current is 10% of fast charge current in constant current mode.
Charging Current limited by the Output capability of Input Power Supply
If the output capability of input power supply is less than the charging current set by the resistor at ISET pin, then the on-chip adaptive cell will begin to function to adjust the charging current based on the output capability of input power supply. In this case, the charging current may be less than the value set by the resistor at ISET pin, but it is maximized to the output capability of input power supply on the condition that the input voltage at VIN pin is no less than 4.4V, which is the minimum operating voltage of CN3165. So the charging current can be set according to the maximum output capability of input power supply, not the worst case.
Adjusting the regulation voltage in constant voltage mode
The regulation voltage in constant voltage mode can be adjusted by an external resistor connecting between FB pin and BAT pin as shown in Figure 5: www.consonance-elec.com 7 REV 1.0
Figure 4 Charging Profile
Application Information Undervoltage Lockout (UVLO)
An internal undervoltage lockout circuit monitors the input voltage and keeps the charger in shutdown mode until VIN rises above the undervoltage lockout voltage. The UVLO circuit has a built-in hysteresis of 0.12V.
Sleep mode
There is an on-chip sleep comparator. The comparator keeps the charger in sleep mode if VIN falls below sleep mode threshold(VBAT+10mv). Once in sleep mode, the charger will not come out of sleep mode until VIN rises 60mv above the battery voltage.
Precharge mode
At the beginning of a charge cycle, if the battery voltage is below 70% of the regulation voltage, the charger goes into precharge mode , and the charge current is 10% of fast charge current in constant current mode.
Charging Current limited by the Output capability of Input Power Supply
If the output capability of input power supply is less than the charging current set by the resistor at ISET pin, then the on-chip adaptive cell will begin to function to adjust the charging current based on the output capability of input power supply. In this case, the charging current may be less than the value set by the resistor at ISET pin, but it is maximized to the output capability of input power supply on the condition that the input voltage at VIN pin is no less than 4.4V, which is the minimum operating voltage of CN3165. So the charging current can be set according to the maximum output capability of input power supply, not the worst case.
Adjusting the regulation voltage in constant voltage mode
The regulation voltage in constant voltage mode can be adjusted by an external resistor connecting between FB pin and BAT pin as shown in Figure 5: www.consonance-elec.com 7 REV 1.0