Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

ZXLD1370 LED driver switching frequency...how to calculate in Buck mode?

Status
Not open for further replies.
T

treez

Guest
The ZXLD1370 LED driver datasheet says that it regulates its switching frequency to 400KHz (bottom of page 5 of datasheet)
However, page 14 of the datasheet states the following……..


**The control loop also regulates the switching frequency by varying the level of hysteresis (the ripple in the inductor current). The hysteresis has a defined minimum (typ 5%) and a maximum (typ 30%).**
Click to expand...


-So what happens when the hysteresis in the inductor current is at 30% (maximum) and yet the frequency is well above 400KHz?…..will the ZXLD1370 allow the inductor current to have more than 30% ripple in that case, in order to bring the switching frequency down to 400KHz?

ZXLD1370 datasheet
**broken link removed**
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top