XRP7602EVB Exar Corporation, XRP7602EVB Datasheet
XRP7602EVB
Specifications of XRP7602EVB
Related parts for XRP7602EVB
XRP7602EVB Summary of contents
Page 1
... Exar’s XRP7604 and SP7600, non synchronous buck high power led drivers respectively rated at 1A and 2A. The XRP7603 is offered in a compact thermally enhanced RoHS compliant “green”/halogen free 8-pin SO package. TYPICAL APPLICATION DIAGRAM Exar Corporation 48720 Kato Road, Fremont CA 94538, USA ...
Page 2
... Minimum Duty Cycle Maximum Duty Cycle VDR Voltage Over-Current Threshold ISET Pin Input Current OFF Interval During Hiccup SHDN Threshold SHDN Threshold Hysteresis Switch On Resistance Switch Leakage Note 1: All parameters tested at T =25°C. Specifications over temperature are guaranteed by design. A © 2009 Exar Corporation ...
Page 3
... BLOCK DIAGRAM PIN ASSIGNEMENT © 2009 Exar Corporation Fig. 2: XRP7603 Block Diagram Fig. 3: XRP7603 Pin Assignement 3/ Rev. 1.0.0 ...
Page 4
... Part Number Range XRP7603EDB-F -40°C≤T ≤+125°C J XRP7603EDBTR-F -40°C≤T ≤+125°C J XRP7603EVB XRP7603 Evaluation Board “YY” = Year – “WW” = Work Week – “F” = Green/Halogen Free designator – “LOT#” = Lot Number © 2009 Exar Corporation ...
Page 5
... All data taken 12V 25°C, unless otherwise specified - Schematic and BOM from Application Information IN A section of this datasheet. Efficiency versus Vin at Iout = 350mA 100 1 LED 2 LED 5.0 10.0 15.0 Vin (V) Fig. 4: Efficiency vs Input Voltage © 2009 Exar Corporation ...
Page 6
... VFB versus Vin at Iout = 350mA 0.210 1 LED 0.205 0.200 0.195 0.190 Vin(V) Fig. 6: Feedback Voltage vs Input Voltage Fig Cout, Output Ripple=150mVpp, Vin=29V 1 LED, Vf=3.2V @ 0.35A Fig. 10: 5V Vin Startup 1 LED, Vf=3.2V @ 0.35A © 2009 Exar Corporation LED Fig Cout, Output Ripple=58mVpp, Vin=6V ...
Page 7
... Fig. 12: 29V Vin Startup 1 LED, Vf=3.2V @ 0.35A © 2009 Exar Corporation Ch1: Vin Ch2: Vout Ch3: VFB Ch4: ILx 0.5A/div 7/ Ch1: Lx Ch2: Vout(AC) Ch3: VFB Ch4: ILx 0.5A/div Fig. 13: Output Overcurrent Hiccup mode with Vin=29V Rev. 1.0.0 ...
Page 8
... This external signal we call DIM turns the MOSFET gate drive on/off, thereby modulating the average current delivered to the LED. The DIM signal connects to the VFB pin through a 1N4148 diode and will shutdown the XRP7603 when DIM = H and turn-on the XRP7603 when © 2009 Exar Corporation ...
Page 9
... Many users will prefer to have the device start operating at the nominal operating frequency, thus it is recommended that Vin be applied © 2009 Exar Corporation ...
Page 10
... Select the input capacitor for capacitance and ripple current rating. Use the capacitances listed in the table starting point and if needed increase Cin. I (A) O <0.7 0.71 to 1.2 >1.2 Table 1: Cin Selection Calculate the ripple current requirement from: = × Irip Io D Equ. Where Vin © 2009 Exar Corporation ...
Page 11
... LX node and inductor input side. Connect the anode to a large diameter trace or a copper area that connects the input ground to the output ground. iv) The output capacitor, if used, should be placed close to the load. Use short wide © 2009 Exar Corporation ...
Page 12
... PACKAGE SPECIFICATION 8-P HSOICN IN © 2009 Exar Corporation 12/ Rev. 1.0.0 ...
Page 13
... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...