Hi TI experts!
I still got the same problem as i posted before (http://e2e.ti.com/support/power_management/battery_management/f/179/t/219298.aspx). Now i post a more detailed description of the problem:
Generally, i want to use the turbo-boost function to supply a load, which is powered by a POE-adapter with a maximum output power of 24W, but the load will have a maximum of 30W....so i need the turbo-boost function. To test the turbo-boost mode i use a lab power supply and halogen-lamps to simulate the load.
In the first test scenario the Input Current limit is set to 2048mA, which is enough to serve the load (20W) and also charge the battery. You can see this in the pictures below:
The blue multimeter shows the charging current, the yellow one shows the total input current.
Increasing the load current above the input current limit (using a load about 30W), with turbo-boost mode enabled, results in entering the turbo-boost mode. So everything is fine with these settings, as you can see in the two following pictures:
The negative current on the blue multimeter, means the load is also powered by the battery.
Also everthing works fine, if the input current limit is set to a higher limit.
Decreasing the input current limit to 1920mA: This is still enough to supply a load about 20W and also charge the battery:
BUT: If i try to supply a bigger load, in our case about 30W with the input limit set to 1920mA, turbo-boost mode IS NOT entered and the load is only supplied by the adapter as you can see below:
The problem is, that our adapter which we want to use is only able to supply a maximum current about these 1920mA. If you try to get out more of it, the adapter crashes.
Why is it possible to enter the turbo-boost mode with a current limit about 2048mA or higher, but not below this value?
Greets Steve
