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Exar XRP7720EVB-DEMO-1 Manual

Quad channel digital pwm/pfm demo board programmable power management system
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January 2014
GENERAL DESCRIPTION
The XRP7720/7724/7725EVB-DEMO-1 board is
a complete, four channel, power system. It
provides
3.3V,
2.5V
maximum of 3A, 3A, 5A and 10A loads
respectively. The 1.5V and 1V supplies can be
adjusted
in
2.5mV
supply in 5mV increments, and the 3.3V
supply is adjustable in 10mV increments. The
order and ramp rates for each supply can be
programmed to accommodate any sequencing
requirement. All power supply operations can
be controlled over an I
output voltages and currents can also be
monitored. Two GPIO and three PSIO signals
are available and can be programmed to
provide
a
variety
GPIO/PSIO pins can be programmed as I/O
expansion for a microcontroller. The board is
supported by PowerArchitect
directly onto the Exar Communications Module
(XRP77xxEVB-XCM).
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
Q
u
a
Q
u
P
P
1.5V
and
1V
at
increments,
the
2.5V
2
C interface. Faults,
of
functions.
Unused
TM
5.1 and plugs
X
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7
7
2
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FEATURES
• XRP7720/XRP7724/XRP7725
Programmable Controller
• 4 Channel Power System
• Wide Input Voltage Range: 5.5V-18V
2
• I
C Interface
− Programming
− Monitoring
− Control
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
2
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XRP7724EVB-DEMO-1
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Rev. 2.0.0
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www.exar.com

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Summary of Contents for Exar XRP7720EVB-DEMO-1

  • Page 1 GPIO/PSIO pins can be programmed as I/O • 4 Channel Power System expansion for a microcontroller. The board is • Wide Input Voltage Range: 5.5V-18V supported by PowerArchitect 5.1 and plugs directly onto the Exar Communications Module • I C Interface (XRP77xxEVB-XCM). − Programming − Monitoring −...

  • Page 2: Evaluation Board Schematics

    LDO3V3 1206 Header 2X2 1206 CH4_OUT VOUT4_VPP ENABLE_IC Header 15 Header 3X2 Header 3X2 Figure 1: XRP7720 /7724/7725 Evaluation Board Schematics Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 – Fax. +1 510 668-7001...
  • Page 3 A bypass capacitor (>1uF) to PAD is recommended for each VCCD pin with the pin(s) connected to LDO5 with shortest possible etch. Analog ground pin. This is the small signal ground connection. AGND © 2014 Exar Corporation 3/16 Rev. 2.0.0...
  • Page 4 Active channels will automatically be ramped down, if desired, prior to the disabling of the chip. Digital ground pin. This is the logic ground connection, and should be connected to the DGND ground plane close to the PAD. 1,3,42 No Connect © 2014 Exar Corporation 4/16 Rev. 2.0.0...
  • Page 5 Analog ground pin. This is the small signal ground connection. Ground connection for the low side gate driver. This should be routed as a signal trace 39,33, 28,22 GL_RTN1-4 with GL. Connect to the source of the low side MOSFET. © 2014 Exar Corporation 5/16 Rev. 2.0.0...

  • Page 6: Ordering Information

    Digital ground pin. This is the logic ground connection, and should be connected to the DGND ground plane close to the PAD. PLL compensation capacitor CPLL ORDERING INFORMATION Refer to XRP7720/XRP7724/XRP7725 datasheets and/or www.exar.com for exact and up to date ordering information. © 2014 Exar Corporation 6/16 Rev. 2.0.0...

  • Page 7: Using The Evaluation Board

    Boards. The software will identify communication ports where it found the XCM board. Select the port. PowerArchitect 5.1 is now communicating with XCM which is indicated in the lower left corner. © 2014 Exar Corporation 7/16 Rev. 2.0.0...
  • Page 8 LDO3.3* into Group 1, and channels 3 and 4 into Group 2. The channels are now in regulation as indicated by Vout readings as well as the in-regulation indicators. Note*: Not available in XRP7720EVB-DEMO-1 © 2014 Exar Corporation 8/16 Rev. 2.0.0...
  • Page 9 Channels can be turned on/off individually if desired. Note: Make sure there is a jumper shorting JP1 pins 1 and 2 installed on your board. Channel 4 will not regulate without it. JP1 JUMPER © 2014 Exar Corporation 9/16 Rev. 2.0.0...
  • Page 10 Header 5X2 GPIO2 1206 LDO5 Header 2X2 1206 LDO3V3 1206 Header 2X2 CH4_OUT VOUT4_VPP ENABLE_IC Header 15 Header 3X2 Header 3X2 EXAR XRP7724EVB-DEMO-1 Title 48720 Kato Road Fremont, CA 94538 Size: Name: Rev: XRP7724.SchDoc 10/16 www.exar.com Date: 1/17/2013 Time: 3:02:06 PM...

  • Page 11: Bill Of Material

    CAP CER C17,C23,C27-C29,C34,C35**,C40 MURATA CORP. GRM188R71H103KA01D 0603 0.01uF,50V,X7R,10% CAP CER 4.7uF, C18,C24,C37,C39 MURATA CORP. GRM21BR71C475KA73 0805 16V,X7R,10% CAP CER 0.1uF, C19,C21,C22,C25,C33,C41-C44 MURATA CORP. GRM188R71H104KA93D 0603 50V,X7R,10% CAP CER MURATA CORP. GRM188R71H222KA01D 0603 2200pF,50V,X7R,10% © 2014 Exar Corporation 11/16 Rev. 2.0.0...
  • Page 12 Header WR-PHD, 15 Pins ELEKTRONIK Switchceaft 2.1mmID, Conn. Powerjack Mini RAPC722X Corp. 5.5mmOD R/A, T/H WURTH 2.54mm Pin 2.54mm Pin Header T6,T8,T10,T11 61304011121 Header WR-PHD, 40 Pins ELEKTRONIK Note**: Not loaded on XRP7720EVB-DEMO-1 © 2014 Exar Corporation 12/16 Rev. 2.0.0...

  • Page 13: Evaluation Board Layout

    EVALUATION BOARD LAYOUT Figure 4: Component Placement – Top Side Figure 5: Layout – Top Side © 2014 Exar Corporation 13/16 Rev. 2.0.0...
  • Page 14 Figure 6: Layout - Bottom Figure 7: Layout – Middle Layer 1 © 2014 Exar Corporation 14/16 Rev. 2.0.0...
  • Page 15 Figure 8: Layout – Internal Plane © 2014 Exar Corporation 15/16 Rev. 2.0.0...

  • Page 16: Document Revision History

    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.

This manual is also suitable for:

Xrp7724evb-demo-1Xrp7725evb-demo-1

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