Hi Team,
We are using the TPS54200 LED Driver IC in our project in analog dimming mode to handle the LED Brightness.We have selected below Inductor value based upon inductor selection formula mentioned in datasheet for two requirements.
Requirement 1
LED Current: 30mA
Vout: 3V
Vin:5.25V
K:0.34
Fs=600KHz
Selected Inductor value=200uH ;Isat (A)=100mA;Irms=170mA
Query 1: Above inductor value is satisfied to drive LED Current =30mA (High Brightness)
Query 2: Is it require to consider the inductor value during the low LED Current value means in low brightness mode.
Requirement 2
LED Current: 30mA
Vout: 9V
Vin:15.75V
K:0.4
Fs=600KHz
Selected Inductor value=560uH;Isat (A)=130mA;Irms=140mA
Query 3: Above inductor value is satisfied to drive LED Current =30mA (High Brightness)
Your input really help us to design the circuit so please provide the inputs ASAP.
Thanks
Gursewak