LTM2987 - 16チャネルのμModule PMBusパワーシステム・マネージャ

特長

  • 16電源のシーケンス制御、調整、マージニング、および監視
  • フォルトの管理、遠隔測定値のモニタ、およびフォルト・ログの作成
  • PMBus™準拠のコマンド・セット
  • LTpowerPlay™ GUIでサポート
  • 電源のマージニングまたは調整の精度:0.25%
  • チャネルごとの高速OV/UVスーパーバイザ
  • 複数のLTC PSMデバイスにまたがるシーケンシングとフォルト管理の連携
  • 内蔵のEEPROMへの自動フォルト・ログ機能
  • ソフトウェア追加不要の自律動作
  • 内部温度スーパーバイザと入力電圧スーパーバイザ
  • 16の出力電圧、2つの入力電圧、内部ダイ温度の正確なモニタ
  • I2C/SMBusシリアル・インタフェース
  • 3.3Vまたは4.5V~15Vの電源で動作可能
  • プログラム可能なウォッチドッグ・タイマ
  • 15mm × 15mmの144ピンBGAパッケージで供給

標準的応用例

LTM2987 Typical Application
LTM2987 Typical Application

概要

LTM®2987は、16チャネルのμModule®(マイクロモジュール)パワーシステム・マネージャで、シーケンス制御、調整(サーボ制御)、監視、フォルトの管理、遠隔測定の実行、およびフォルト・ログの作成を行うために使用します。PMBusコマンドは、電源シーケンシング、高精度のポイントオブロード電圧調整およびマージニングをサポートしています。D/Aコンバータは、独自のソフト接続アルゴリズムを使用して、電源の障害を最小限に抑えます。監視機能には、16の電源出力チャネルと2つの電源入力チャネルの過電圧および低電圧制限しきい値、ならびに温度の上限値と下限値が含まれています。プログラム可能なフォルト応答により電源をディスエーブルできますが、フォルトが検出された後に再試行を任意で選択可能です。電源をディスエーブルするフォルトが発生すると、フォルト状態と関連の遠隔測定データをブラック・ボックスEEPROMに保存する機能を自動的に起動できます。内蔵の16ビットA/Dコンバータは、16の出力電圧、2つの入力電圧、ダイ温度をモニタします。さらに、電流検出抵抗両端の電圧を測定するように奇数チャネルを設定できます。プログラム可能なウォッチドッグ・タイマは、マイクロプロセッサの動作が膠着状態であるかどうかをモニタし、必要に応じてマイクロプロセッサをリセットします。1線式バスは、リニアテクノロジーの複数のパワーシステム・マネージメント(PSM)デバイスにわたって電源を同期します。環境設定EEPROMにより、ソフトウェアを追加せずに自律動作がサポートされます。

パッケージ

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

パッケージの最新情報ならびに図面については、パッケージング情報を参照してください。

製品番号 パッケージ Code 温度 Package Drawing RoHSデータ
LTM2987CY#PBF 15mm x 15mm x 3.42mm BGA BGA C 05-08-1946 Yes
LTM2987IY#PBF 15mm x 15mm x 3.42mm BGA BGA I 05-08-1946 Yes


LTM2987 Package Drawing

発注情報

各種パッケージと価格

製品番号 パッケージ 温度 価格(1~99個時) 価格(1000個時)* RoHSデータ
LTM2987CY#PBF 15mm x 15mm x 3.42mm BGA C $34.21 $23.95 Yes
LTM2987IY#PBF 15mm x 15mm x 3.42mm BGA I $39.21 $27.45 Yes
購入サンプルリクエスト
* 米ドル価格は、米国内における定められた数量に対する工場渡しでの単価です。変更される可能性がありますので、予算目的でのみご使用願います。米国以外の国における価格は、輸送費、税金、手数料、為替レートにより変動する場合があります。注文個数に応じた価格および納期については、リニアテクノロジー正規代理店までお問い合わせください。

評価キット

リニアテクノロジーのデモボードは、認定のお客様に無料で提供されます。デモボードをご希望の場合は、最寄りのセールスオフィスまたは代理店 にお問い合わせください。一部のデモボードは、このWebページ上でクレジットでもご購入いただけます。デモボードは評価目的でのみご使用ください。実際の最終アプリケーションにおける動作検証と信頼性の確認は、お客様の責任において行っていただきますようお願いいたし ます。

製品番号 概要 価格 Documentation
DC2023A LTM2987CY Demo Board | 16 Power Supply Manager [Requires DC1613] $95.00
購入

Companion Boards

製品番号 概要 価格 Documentation
DC1613A USB-to-PMBus Controller for Use with LTpowerPlay $50.00
DC2026C Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform $75.00
購入
ここをクリック 全デモボードリストがご覧いただけます。

アプリケーション

  • コンピュータおよびネットワーク・サーバ
  • 産業用テスト装置および測定装置
  • 高信頼性システム
  • 医療用画像処理
  • ビデオ

Product Notifications

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パスワードをお忘れですか? こちらを クリック.
ヘルプが必要ですか? 質問事項を英語で mylinear@linear.com

デザインツール

LTpowerPlay

LTpowerPlayは強力な開発環境で、リニアテクノロジーのデジタル・パワー・システム・マネジメント(PSM)製品をサポートし、これまでにない診断機能とデバッグ機能を提供します。

LTpowerPlayをダウンロードするにはここをクリック

Linduino

Linduino is an Arduino compatible platform for developing and distributing firmware libraries and code for SPI and I²C-compatible integrated circuits. The Linduino One board interfaces to more than 300 QuikEval demonstration cards, supporting a variety of product types including analog-to-digital converters (ADCs)digital-to-analog converters (DACs)power monitors, and more. Firmware libraries for individual devices are written in C and designed to be portable to a wide variety of processors and microcontrollers. Each library has a demonstration program that can be uploaded to the Linduino One platform to allow the circuit and software to be quickly and easily verified.

Click here for more information on Linduino

Code

Linduino is Linear Technology's Arduino compatible system for developing and distributing firmware libraries and example code for Linear Technology’s integrated circuits. The code below can be downloaded or copied and pasted into your project. Please visit the Linduino Home Page for demo board, manual and setup information.

This part is Code Supported: There is example code available for this part. The code below may rely on other drivers available in the full library.

Download LTM2987 - DC2023A.ino

/*!
Linear Technology DC1590B Demonstration Board
LTM2987: 16-Channel μModule PMBus Power System Manager

@verbatim

NOTES
  Setup:
   Set the terminal baud rate to 115200 and select the newline terminator.

@endverbatim

http://www.linear.com/product/LTM2987

http://www.linear.com/demo/DC1590B

REVISION HISTORY
$Revision: 4080 $
$Date: 2015-09-24 16:36:34 -0600 (Thu, 24 Sep 2015) $

Copyright (c) 2014, Linear Technology Corp.(LTC)
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of Linear Technology Corp.

The Linear Technology Linduino is not affiliated with the official Arduino team.
However, the Linduino is only possible because of the Arduino team's commitment
to the open-source community.  Please, visit http://www.arduino.cc and
http://store.arduino.cc , and consider a purchase that will help fund their
ongoing work.
*/

/*! @file
    @ingroup LTM2987
*/

#include <Arduino.h>
#include <stdint.h>
#include "Linduino.h"
#include "UserInterface.h"
#include "LT_I2CBus.h"
#include "LT_SMBusNoPec.h"
#include "LT_SMBusPec.h"
#include "LT_PMBus.h"

#define LTM2987_I2C_ADDRESS_1 0x30
#define LTM2987_I2C_ADDRESS_2 0x32

// Global variables
static uint8_t ltm2987_i2c_address_1;
static uint8_t ltm2987_i2c_address_2;
static LT_SMBus *smbus = new LT_SMBusPec();
static LT_PMBus *pmbus = new LT_PMBus(smbus);

//! Initialize Linduino
//! @return void
void setup()
{
  Serial.begin(115200);         //! Initialize the serial port to the PC
  print_title();
  ltm2987_i2c_address_1 = LTM2987_I2C_ADDRESS_1;
  ltm2987_i2c_address_2 = LTM2987_I2C_ADDRESS_2;
  print_prompt();
}

//! Repeats Linduino loop
//! @return void
void loop()
{
  uint8_t user_command;
  uint8_t res;
  uint8_t model[7];
  uint8_t *addresses = NULL;

  if (Serial.available())                          //! Checks for user input
  {
    user_command = read_int();                     //! Reads the user command
    if (user_command != 'm')
      Serial.println(user_command);

    switch (user_command)                          //! Prints the appropriate submenu
    {
      case 1:
        menu_1_basic_commands();                 // Print single-ended voltage menu
        break;
      case 2:
        pmbus->enablePec(ltm2987_i2c_address_1);
        pmbus->enablePec(ltm2987_i2c_address_2);
        delete smbus;
        delete pmbus;
        smbus = new LT_SMBusPec();
        pmbus = new LT_PMBus(smbus);
        break;
      case 3:
        pmbus->disablePec(ltm2987_i2c_address_1);
        pmbus->disablePec(ltm2987_i2c_address_2);
        delete smbus;
        delete pmbus;
        smbus = new LT_SMBusNoPec();
        pmbus = new LT_PMBus(smbus);
        break;
      case 4:
        addresses = smbus->probe(0);
        while (*addresses != 0)
        {
          Serial.print(F("ADDR 0x"));
          Serial.println(*addresses++, HEX);
        }
        break;
      case 5 :
        pmbus->clearAllFaults(ltm2987_i2c_address_1);
        pmbus->clearAllFaults(ltm2987_i2c_address_2);
        break;
      default:
        Serial.println(F("Incorrect Option"));
        break;
    }
    print_prompt();
  }

}

// Function Definitions

//! Prints the title block when program first starts.
//! @return void
void print_title()
{
  Serial.print(F("\n*****************************************************************\n"));
  Serial.print(F("* DC2023A Demonstration Program                                 *\n"));
  Serial.print(F("*                                                               *\n"));
  Serial.print(F("* This program demonstrates how to send and receive data from   *\n"));
  Serial.print(F("* the DC2023A demo board.                                       *\n"));
  Serial.print(F("*                                                               *\n"));
  Serial.print(F("* Set the baud rate to 115200 and select the newline terminator.*\n"));
  Serial.print(F("*                                                               *\n"));
  Serial.print(F("*****************************************************************\n"));
}

//! Prints main menu.
//! @return void
void print_prompt()
{
  Serial.print(F("\n  1-Basic Commands\n"));
  Serial.print(F("  2-PEC On\n"));
  Serial.print(F("  3-PEC Off\n"));
  Serial.print(F("  4-Bus Probe\n"));
  Serial.print(F("  5-Clear Faults\n"));
  Serial.print(F("\nEnter a command:"));
}

//! Prints a warning if the demo board is not detected.
//! @return void
void print_warning_prompt()
{
  Serial.println(F("\nWarning: Demo board not detected. Linduino will attempt to proceed."));
}

//! Print all voltages.
//! @return void
void print_all_voltages()
{
  float   voltage;
  uint8_t page;

  for (page = 0; page < 8; page++)
  {
    pmbus->setPage(ltm2987_i2c_address_1, page);
    voltage = pmbus->readVout(ltm2987_i2c_address_1, false);
    Serial.print(F("LTM2987 #1 VOUT "));
    Serial.println(voltage, DEC);
  }
  for (page = 0; page < 8; page++)
  {
    pmbus->setPage(ltm2987_i2c_address_2, page);
    voltage = pmbus->readVout(ltm2987_i2c_address_2, false);
    Serial.print(F("LTM2987 #2 VOUT "));
    Serial.println(voltage, DEC);
  }
}

//! Print all status bytes and words.
//! @return void
void print_all_status()
{
  uint8_t b;
  uint16_t w;
  uint8_t page;

  for (page = 0; page < 8; page++)
  {
    Serial.print(F("PAGE "));
    Serial.println(page, DEC);
    pmbus->setPage(ltm2987_i2c_address_1, page);
    b = pmbus->readStatusByte(ltm2987_i2c_address_1);
    Serial.print(F("LTM2987 #1 STATUS BYTE 0x"));
    Serial.println(b, HEX);
    w = pmbus->readStatusWord(ltm2987_i2c_address_1);
    Serial.print(F("LTM2987 #1 STATUS WORD 0x"));
    Serial.println(w, HEX);
  }

  for (page = 0; page < 8; page++)
  {
    Serial.print(F("PAGE "));
    Serial.println(page, DEC);
    pmbus->setPage(ltm2987_i2c_address_2, page);
    b = pmbus->readStatusByte(ltm2987_i2c_address_2);
    Serial.print(F("LTM2982 #2 STATUS BYTE 0x"));
    Serial.println(b, HEX);
    w = pmbus->readStatusWord(ltm2987_i2c_address_2);
    Serial.print(F("LTM2987 #2 STATUS WORD 0x"));
    Serial.println(w, HEX);
  }
}

//! Sequence off then on
//! @return void
void sequence_off_on()
{
  pmbus->sequenceOffGlobal();
  delay (2000);
  pmbus->sequenceOnGlobal();
}

//! Margin high
//! @return void
void margin_high()
{
  pmbus->marginHighGlobal();
}

//! Margin low
//! @return void
void margin_low()
{
  pmbus->marginLowGlobal();
}

//! Go to nominal
//! @return void
void margin_off()
{
  pmbus->sequenceOnGlobal();
}

//! Display menu 1
//! @return void
void menu_1_basic_commands()
{
  uint8_t user_command;

  do
  {
    //! Displays the Read/Write menu
    Serial.print(F("\nRead/Write\n\n"));
    Serial.print(F("  1-Read All Voltages\n"));
    Serial.print(F("  2-Read All Status\n"));
    Serial.print(F("  3-Sequence Off/On\n"));
    Serial.print(F("  4-Margin High\n"));
    Serial.print(F("  5-Margin Low\n"));
    Serial.print(F("  6-Margin Off\n"));
    Serial.print(F("  m-Main Menu\n"));
    Serial.print(F("\nEnter a command: "));

    user_command = read_int();                              //! Reads the user command
    if (user_command == 'm')                                // Print m if it is entered
    {
      Serial.print(F("m\n"));
    }
    else
      Serial.println(user_command);                         // Print user command

    switch (user_command)
    {
      case 1:
        print_all_voltages();
        break;
      case 2:
        print_all_status();
        break;
      case 3:
        sequence_off_on();
        break;
      case 4:
        margin_high();
        break;
      case 5:
        margin_low();
        break;
      case 6:
        margin_off();
        break;
      default:
        if (user_command != 'm')
          Serial.println(F("Invalid Selection"));
        break;
    }
  }
  while (user_command != 'm');
}


Download LTM2987 - Linduino CPP File

#include "LT_PMBusDeviceLTM2987.h"

uint32_t LT_PMBusDeviceLTM2987::cap_ =  HAS_VOUT
                                        | HAS_VIN
                                        | HAS_TEMP
                                        | HAS_STATUS_WORD
                                        | HAS_STATUS_EXT
                                        ;

Download LTM2987 - Linduino Header File

/*!
LTC PSM Device

@verbatim

Representation of a device and its capabilities.

@endverbatim

REVISION HISTORY
$Revision: 3845 $
$Date: 2015-08-24 14:11:21 -0600 (Mon, 24 Aug 2015) $

Copyright (c) 2014, Linear Technology Corp.(LTC)
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of Linear Technology Corp.

The Linear Technology Linduino is not affiliated with the official Arduino team.
However, the Linduino is only possible because of the Arduino team's commitment
to the open-source community.  Please, visit http://www.arduino.cc and
http://store.arduino.cc , and consider a purchase that will help fund their
ongoing work.
*/

/*! @file
    @ingroup LT_PMBusDevice
    Library Header File for LT_PMBusDeviceLTC2987
*/

#ifndef LT_PMBusDeviceLTM2987_H_
#define LT_PMBusDeviceLTM2987_H_

#include "LT_PMBusDeviceManager.h"
#include "../LTPSM_PartFaultLogs/LT_2977FaultLog.h"

class LT_PMBusDeviceLTM2987 : public LT_PMBusDeviceManager
{
  public:

    static uint32_t cap_;

    LT_PMBusDeviceLTM2987(LT_PMBus *pmbus, uint8_t address) : LT_PMBusDeviceManager(pmbus, address, 8)
    {
    }

    uint32_t getCapabilities (
    )
    {
      return cap_;
    }

    //! Is/are these capability(s) supported?
    //! @return true if yes
    bool hasCapability(
      uint32_t capability          //!< List of capabilities
    )
    {
      return (cap_ & capability) == capability;
    }

    char *getType(void)
    {
      uint8_t *model = (uint8_t *) calloc(8,1);
      memcpy(model, "LTM2987", 7);
      return (char *) model;
    }

    static LT_PMBusDevice *detect(LT_PMBus *pmbus, uint8_t address)
    {
      uint16_t id;
      LT_PMBusDeviceLTM2987 *device;

      id = pmbus->readMfrSpecialId(address);
      if (  (id & 0xFFF0) == 0x8010
            || (id & 0xFFF0) == 0x8020)
      {
        device = new LT_PMBusDeviceLTM2987(pmbus, address);
        device->probeSpeed();
        return device;
      }
      else
        return NULL;
    }

    uint8_t getNumPages(void)
    {
      return 8;
    }

    void enableFaultLog()
    {
      LT_2977FaultLog *faultLog = new LT_2977FaultLog(pmbus_);
      faultLog->enableFaultLog(address_);
      delete faultLog;
    }

    void disableFaultLog()
    {
      LT_2977FaultLog *faultLog = new LT_2977FaultLog(pmbus_);
      faultLog->disableFaultLog(address_);
      delete faultLog;
    }

    bool hasFaultLog()
    {
      LT_2977FaultLog *faultLog = new LT_2977FaultLog(pmbus_);
      if (faultLog->hasFaultLog(address_))
      {
        delete faultLog;
        return true;
      }
      else
      {
        delete faultLog;
        return false;
      }
    }

    char *getFaultLog()
    {
      LT_2977FaultLog *faultLog = new LT_2977FaultLog(pmbus_);
      if (faultLog->hasFaultLog(address_))
      {
        faultLog->read(address_);
//      faultLog->print(&Serial);
        faultLog->dumpBinary(&Serial);
        faultLog->release();
        delete faultLog;
        return NULL;
      }
      else
      {
        delete faultLog;
        return NULL;
      }
    }

    void clearFaultLog()
    {
      LT_2977FaultLog *faultLog = new LT_2977FaultLog(pmbus_);
      if (faultLog->hasFaultLog(address_))
      {
        faultLog->clearFaultLog(address_);
        pmbus_->smbus()->waitForAck(address_, 0x00);
        pmbus_->waitForNotBusy(address_);
        delete faultLog;
      }
      else
      {
        delete faultLog;
      }
    }
};

#endif /* LT_PMBusDeviceLTM2987_H_ */

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