XRP2524EVB

XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch October 2012 Rev. 1.0.0 GENERAL DESCRIPTION EVALUATION BOARD MANUAL The Exar XRP2524 Evaluation board (EVB) is a fully assembled and tested surface-mount PCB that demonstrates the XRP2524 dual-channel integrated high-side power distribution switches. Optimized for USB VBUS power distribution, the XRP2524 is compliant with the latest USB 3.0 specification and can be used in any self or bus powered USB applications. It is provided with an enable pin while an error flag is available to indicate fault conditions. XRP2524 is offered in a RoHS compliant “green”/halogen free 8-pin NSOIC package. FEATURES  Dual Channel Current Switch  1A continuous load current per channel  1.5A Typical Over-current Limit  2.7V to 6.5V Input Voltage Range STANDARD CONFIGURATION The XRP2524EVB is configured to operate under the following conditions:  Input voltage range VIN:  Output current/load range: 2.7V – 6.5V 0 – 1.0A  USB 2.0/3.0 Compliant  Active High Enable  Channel Error Flag Indicator  Reverse Current, Short Circuit & Thermal Shutdown Protection EVALUATION BOARD SCHEMATICS U1 DNP 1 2 3 EN OUT 5 GND FLG 4 IN ENA VIN = 2.7V - 6.5V R1 10k FLGA VIN R2 VLA 1 DNP 2 R4 VLB 3 DNP 4 ENA OUTA FLGA IN FLGB GND ENB OUTB U2 8 VOUTA 7 6 CIN1 5 DNP CLA1 CLA2 22uF 0.1uF CIN2 1uF GND XRP2524 FLGB CLB1 CLB2 22uF 0.1uF R3 10k ENB VOUTB Fig. 1: XRP2524 Evaluation Board Schematic Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch PIN ASSIGNMENT XRP2524 ENA 1 8 OUTA FLGA 2 7 IN FLGB 3 6 GND ENB 4 5 OUTB NSOIC-8L Fig. 2: XRP2524 Pin Assignment PIN DESCRIPTION – XRP2524 Name Pin Number Description ENX 1,4 Channel Enable Input Active High FLGX 2,3 Error Flag Signal Active low open drain output. Active on over-current, over-temperature or short-circuit conditions. GND 6 Ground Signal IN 7 Voltage Input Pin OUTX 5,8 Voltage Output Pin ORDERING INFORMATION Refer to XRP2524’s datasheet and/or www.exar.com for exact and up to date ordering information. © 2012 Exar Corporation 2/8 Rev. 1.0.0 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch USING THE EVALUATION BOARD Flag pin is pulled up to VIN through a 10kΩ resistor (provided by default on the board) or can be instead connected to a separate external power supply voltage VLA/VLB. INITIAL SETUP The Board is supplied from EXAR with the XRP2524 device. Set the input supply to a voltage between 2.7V to 6.5V and connect it to VIN and GND connectors on the right side of the evaluation board. The board will power-up upon turning on the input supply and reach the desired output voltage. The board can operate with a load current IOUT of up to 1A per channel. Enable pin must be pulled up HIGH to enable the IC. Connect the load to the VOUT and PGND connectors on the right hand side of the board. TYPICAL PERFORMANCE CHARACTERISTICS All data taken at V IN = 5V, CIN = 1µF, COUT = 22µF//0.1µF, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application Information section of this datasheet. Fig. 3: Output On-Resistance vs. Supply Voltage Fig. 4: Output On-Resistance vs. Temperature Fig. 5: ON-State Supply Current vs. Supply Voltage Fig. 6: ON-State Supply Current vs. Temperature © 2012 Exar Corporation 3/8 Rev. 1.0.0 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch Fig. 8: Current Limit Threshold vs. Temperature Fig. 7: Current Limit Threshold vs. Supply Voltage Fig. 10: Flag Delay Time vs. Temperature Fig. 9: Flag Delay Time vs. Supply Voltage Fig. 11: Enable Threshold vs. Supply Voltage © 2012 Exar Corporation Fig. 12: UVLO Threshold Voltage vs. Temperature 4/8 Rev. 1.0.0 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch Fig. 13: Output Rising Time vs. Temperature Fig. 14: Short circuit protection, VIN = 5.0V Fig. 15: Turn-On/Off Characteristics: COUT=1uF, Rload=10Ω Fig. 16: Turn-On/Off Characteristics: COUT=1uF,Rload=5.1Ω Fig. 17: Current Limit Operation: VIN = 5.5V, Rload = 3.3Ω © 2012 Exar Corporation 5/8 Rev. 1.0.0 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch EVALUATION BOARD SCHEMATICS ENA FLGA VLA VLB FLGB ENB R2 R4 DNP DNP 1 2 3 4 1 2 3 EN IN OUT U1 DNP GND FLG R1 10k 5 FLGA GND IN 4 FLGB OUTB OUTA ENB XRP2524 ENA U2 R3 10k 8 7 6 5 CIN1 DNP CIN2 0.1uF CLA2 CLB2 CLA1 0.1uF 22uF CLB1 1uF 22uF VIN = 2.7V - 6.5V VIN VOUTA GND VOUTB Rev. 1.0.0 6/8 © 2012 Exar Corporation XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch BILL OF MATERIAL Ref. Qty Manufacturer EVAL BD 1 Part Number Size 146-6693-01 Exar Corp. Component XRP2524 Evaluation Board U2 1 Exar Corp. XRP2524 8-pin NSOIC XRP2524 CIN2 1 Murata Corp. GRM188R71E105KA12D 0603 Ceramic 1uF, 25V, X7R CLA1, CLB1 2 Murata Corp. GRM31CR61C226KE15L 1206 Ceramic 22uF, 16V, X5R CLA2, CLB2 2 Murata Corp. GRM188R71H104KA93D 0603 Ceramic 0.1uF, 50V, X7R R1, R3 3 Panasonic Corp. ERJ-3EKF1002V 0603 Resistor 10KΩ, 1/10W, 1% Test Point VIN, GND, PGND, VOUTA, VOUTB, ENA, ENB, FLGA, FLGB, VLA, VLB 12 VECTOR K24C/M 0.042” diameter Test Point Post EVALUATION BOARD LAYOUT Fig. 19: Top Side Layout Fig. 18: Component Placement – Top Side Fig. 20: Bottom Side Layout © 2012 Exar Corporation 7/8 Rev. 1.0.0 XRP2524 1A Dual Channel USB 3.0 Power Distribution Switch DOCUMENT REVISION HISTORY Revision Date 1.0.0 11/05/2012 Description Initial release of evaluation board manual BOARD REVISION HISTORY Board Revision Date 146-6693-01 10/10/2012 Description Initial release of evaluation board FOR FURTHER ASSISTANCE Email: customersupport@exar.com powertechsupport@exar.com Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx? EXAR CORPORATION HEADQUARTERS AND SALES OFFICES 48720 Kato Road Fremont, CA 94538 – USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7030 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depend ing upon a user’s specific application. 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 malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. or its in all Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. © 2012 Exar Corporation 8/8 Rev. 1.0.0