IP5407

V1.31

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Copyright © 2019, Injoinic Corp.

11 Function description

Boost

IP5407 integrates a Boost DCDC converter with an output of 5V and a load capacity of 2.1A. The switching

frequency is 950KHz, 3.8V input, and the efficiency is 92% at 5V / 2.1A. Built-in soft-start function to prevent

malfunction caused by excessive inrush current during startup. Integrated output over-current, short-circuit,

over-voltage, over-temperature protection functions When an output overcurrent or short circuit is detected, the

output will be restarted every second to ensure that the system works stably and reliably. lP5407 will turn on the

5V boost output and power display after the BAT voltage is greater than 3.2V. When the output current is less

than 50mA and after 36s, the power display will be turned off and the output voltage will be fixed at 5V to enter

the low power consumption mode. When the IP5407 detects that the BAT voltage is lower than 3.0V, it will turn

off the output. After the BAT voltage rises, it needs to be charged and activated to output normally.

Figure 4 Boost efficiency curve

Charge

IP5407 has a constant current, constant voltage lithium battery charger with a synchronous switch structure.

When the battery voltage is less than 3v, 100mA slip current charging is used; when the battery voltage is greater

than 3V, it enters constant current charging, and the VIN input current limiting loop works; when the battery

voltage is greater than 4.2V, it enters constant voltage charging.After the charging is completed, if the battery

voltage is lower than 4.1V, restart the battery charging

P5407 adopts switch charging technology, with a switching frequency of 500KHz and a charging current of

2.0A at the VIN input terminal. The charging efficiency is up to 91%.

Adaptive power path management, support charge and discharge simultaneously.

IP5407 charging will automatically adjust the charging current to adapt to adapters with different load

capacities, without pulling the charger.