MP2489-maximum output voltage at Vin 24VDC

Lighting Solutions
1

Dear MPS team,

Could you let me know min ⊿V between Vin and Vout of MP2489?

Currently we are using MP2489 to drive a LED module with Vin= 24VDC and output voltage is about 19VDC.
Since the input voltage is unstable and it might be around 21V, we worry about ⊿V<3V would make the circuit unstable.

2

Hi alice,

The maximum duty cycle recommended for this device is 70%. At 19Vout, 24Vin, you are already above at ~79%. This can lead to instability in your LED operation.

Regards,
Vinh Tran