LM2794EVAL National Semiconductor, LM2794EVAL Datasheet
LM2794EVAL
Specifications of LM2794EVAL
Related parts for LM2794EVAL
LM2794EVAL Summary of contents
Page 1
... Iset to provide fully off to maximum current control. The switching frequency is between 450KHz to 850KHz for the LM2791 and 900KHz to 1800KHz for LM2792. Both devices accept an input volt- Typical Application Circuit © 2002 National Semiconductor Corporation National Semiconductor Application Note 1218 Anne Lu February 2002 age range ...
Page 2
R Selection (LM2791/2) SET R is the resistor that sets the current through both LEDs. SET It is left intentionally for the end users to set the desired current range. Equations below are used for determining R value: SET Eq. ...
Page 3
... PWM signal in the range of 100Hz to 1KHz is recommended. Value LM2791/2LD-L C2012X7R1C105K, 16V uF C2012X7R1C105K, 16V uF C2012X7R1C105K, 16V uF Value to be determined by the end users, +/-1% LWT67C/LWT673 BAT-54 =4P 3 (for IN (for IN Size Manufacturer LLP-10 National Semiconductor 0805 TDK 0805 TDK 0805 TDK Osram SOT23-3 Fairchild www.national.com ...
Page 4
LM2791/2 Evaluation Board www.national.com FIGURE 1. Silksreen FIGURE 2. PCB Layout 4 20037103 20037104 ...
Page 5
Component List for LM2794/5 Component Name U1 LM2794 HOLD R Through hold SET Diode1 - 4 Surface Mount Device, White LEDs (TOPLED) LM2794/5 Evaluation Board Type Value LM2794BL --- Active Low Shutdown LM2795BL --- Active High ...
Page 6
... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...