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DC2028A
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ANALOG DEVICES
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Related Manuals for Linear Technology DC2028A
Summary of Contents for Linear Technology DC2028A
- Page 1 We have 45,000 LP502030-PCM-NTC-LD-A02554 - EEMB - Lithium Battery Rectangular 3.7V 250mAh Rechargeable in stock now. Starting at $0.034. This EEMB part is fully warrantied and traceable. 00000005981LF-000 DC2028A EOS Power ANALOG DEVICES Buy Now Buy Now Looking for a discount?
- Page 2 LTC2977 Available in 64-Lead QFN Package multiple Power System Management ICs. The user can L, LT, LTC, LTM, Linear Technology, and the Linear logo are registered trademarks and configure up to eight DC2028A boards, thereby controlling LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the up to 64 separate power supply rails.
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Page 3: Performance Summary
DEMO MANUAL DC2028A perFormAnce summAry Specifications are at T = 25°C POWER SUPPLY CHANNEL CH(0:7) Manager/Controller LTC2977 Nominal Untrimmed Output Voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.7V, 3.0V, 3.3V Rated Output Current 0.3A Default Margin Range ±5% Output Trim Range (V = 1.38V) - Page 4 PMBus controller to communicate with one of many po- system management ICs with EEPROM, including the tential targets, including the DC2028A demo system or a LTC2977 8-channel PMBus Power System Manager. The customer board. The software also provides an automatic software supports a variety of different tasks.
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Page 5: Quick Start Procedure
DC2028A. 6. Launch the LTpowerPlay GUI. a. The GUI automatically identifies the DC2028A and builds a system tree for each power manager. The system tree on the left hand side will look like this: Note: For multiple board arrays, the GUI automatically ensures each device has a unique address. - Page 6 DEMO MANUAL DC2028A Quick stArt proceDure b. A green message box will be displayed momentarily in the lower left hand corner confirming that the DC2028A is communicating. c. Save the demo board configuration to a (*.proj) file by clicking the Save icon. This creates a backup file. Name it whatever you want.
- Page 7 DEMO MANUAL DC2028A Dc2028A DetAiLs – top siDe Figure 3. DC2028A Top Side Details dc2028af...
- Page 8 CREATING A FAULT There is a pushbutton on the DC2028A board that is used to force a fault and demonstrate the demo board’s ability to detect it and respond accord- ing to the configuration. When depressed, the pushbutton creates a fault (short to ground) on channel 7, the 3.3V output (GUI channel U0:7).
- Page 9 For further information, see the Working with the Fault Log section. RESETTING THE DC2028A A reset pushbutton is provided on the board. To reset all devices on the DC2028A board and reload the EEPROM contents into operating memory (RAM), press RESET (SW2) on the DC2028A.
- Page 10 DC2028A LEDS Each individual channel on DC2028A has its own green power good LED (CH0 through CH7). When USB power (DC1613 controller) or external power (6V to 14V jack) is applied, the 5V green LED will illuminate, indicating that the LTC2977 Power System Manager is powered.
- Page 11 DEMO MANUAL DC2028A common Demo BoArD operAtions Each channel has an LED which visually indicates if the channel has power. When the CONTROL pin is switched on and off, you will observe the relative on/off timing of the eight channels.
- Page 12 Clicking the icon will bring up a dialog box. Note that it is context sensitive. If multiple DC2028A boards are connected, be sure that the desired device is selected in the system tree.
- Page 13 LTC2977 channels, and a fault on any given channel will propagate to all channels on the DC2028A demo board since the fault pins are tied together. NOTE: All FAULT pins of the LTC2977 are tied together on the DC2028A demo board.
- Page 14 (output) or may respond to the fault pin when another device drives it low (input). Because all fault pins are wire OR’d on the DC2028A, this hardware configuration allows one to program each device’s fault settings on a channel-by-channel basis.
- Page 15 DEMO MANUAL DC2028A setup proceDure For muLti-BoArD ArrAys Up to eight DC2028A boards can be cascaded to control in the GUI, click the magnifying glass icon to up to 64 independent power supplies. The number of enumerate the I C bus and find the addresses boards is limited by an I/O expander chip that has three of the parts.
- Page 16 0x20. The DIP switch settings set the offset. The three switches that may be There is a small DIP switch on the backside of the DC2028A. changed are labeled A0, A1, A2. Examples below set the It is used to set the slave address of an I/O expander which boards to addresses 0x20 and 0x27.
- Page 17 DEMO MANUAL DC2028A Dc2028A DetAiLs – top Table 1. DC2028A - Default Switch Configuration (Default Position Shown in Grey in the Figure Above) REFERENCE DESIGNATOR SIGNAL NAME USAGE DEFAULT JP3 (Bottom) A0, A1, A2 DIP Switch Used to Set the Address Offset...
- Page 18 DEMO MANUAL DC2028A Dc2028A DetAiLs – Bottom dc2028af...
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Page 19: Parts List
DEMO MANUAL DC2028A pArts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components IC 8-CH PWR SYSTEM MANAGER 64-QFN Linear Technology: LTC2977CUP C12, C18, C19 CAP CER 0.1µF 16V 10% X7R 0603 NIC: NMC0603X7R104K16TRPF Additional Demo Board Circuit Components... - Page 20 DEMO MANUAL DC2028A pArts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER RES 47.5kΩ 1/10W 1% 0603 SMD Vishay: CRCW060375K5FKEA RES 42.2kΩ 1/10W 1% 0603 SMD NIC: NRC06F4222TRF RES 36.5kΩ 1/10W 1% 0603 SMD Vishay: CRCW060336K5FKEA RES 32.4kΩ 1/10W 1% 0603 SMD...
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Page 21: Schematic Diagram
DEMO MANUAL DC2028A schemAtic DiAGrAm dc2028af... - Page 22 DEMO MANUAL DC2028A schemAtic DiAGrAm dc2028af...
- Page 23 DEMO MANUAL DC2028A schemAtic DiAGrAm dc2028af...
- Page 24 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
- Page 25 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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