Summary
Demonstration circuit 2089A is a high current, high efficiency, poly-phase synchronous buck converter featuring the LTC®3880EUJ, a dual-phase current mode controller, and the LTC3870EUFD, a dual-phase slave controller. The LTC3880 has the PMBus interface and power system management functions.
The DC2089A uses discrete MOSFETs as the power stage. The input range of this board is from 7V to 14V, and the output voltage can be programmed from 0.8V to 1.8V. The output current is up to 80A for 4-phase operation. The DC2089A has two versions, the DC2089A-A uses a current sense resistor, while the DC2089A–B has DCR current sensing. The factory default setting for the output voltage is 1.0V. The DC2089A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances.
The DC2089A powers up to default settings and produces power based on configuration resistors or NVM without the need for any serial bus communication. This allows easy evaluation of the DC-DC converter aspects of the LTC3880. To fully explore the extensive power system management features of the parts, download the GUI software LTpowerPlay™ onto your PC and use LTC’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.
The DC2089A uses discrete MOSFETs as the power stage. The input range of this board is from 7V to 14V, and the output voltage can be programmed from 0.8V to 1.8V. The output current is up to 80A for 4-phase operation. The DC2089A has two versions, the DC2089A-A uses a current sense resistor, while the DC2089A–B has DCR current sensing. The factory default setting for the output voltage is 1.0V. The DC2089A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances.
The DC2089A powers up to default settings and produces power based on configuration resistors or NVM without the need for any serial bus communication. This allows easy evaluation of the DC-DC converter aspects of the LTC3880. To fully explore the extensive power system management features of the parts, download the GUI software LTpowerPlay™ onto your PC and use LTC’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.
Specifications
| Manufacturer | Analog Devices Inc. |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | DC/DC SMPS - Single Output |
| Eval Board Part Number | DC2089A-B-ND |
| Eval Board Supplier | Analog Devices Inc. |
| Eval Board |
Normally In Stock
|
| Topology |
Step Down
|
| Outputs and Type |
1 Non-Isolated
|
| Voltage Out: Factory Set |
1 V
|
| Current Out |
80 A
|
| Voltage In |
7 ~ 14 V
|
| Efficiency @ Conditions |
>88%, 12V in, 1.2V @ 31 ~ 80 A
>87%, 12V in, 1V @ 30 ~ 80 A |
| Voltage Out Range |
0.8 ~ 1.8 V
|
| Features |
Current Limit (Adj. or Fixed)
GUI / Design Software I²C Interface Memory Available On-Board Over Voltage Protection Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection Under Voltage Protection, Brown-Out |
| Switching Frequency |
100 kHz ~ 1 MHz
|
| Standby Current [Typical] |
- Not Given
|
| Quiescent Current [Typical] |
22.6 mA
|
| Component Count + Extras |
149 + 138
|
| Internal Switch |
No
|
| Design Author |
Linear Technology
|
| Application / Target Market |
Power: Auxiliary Power Supply
Power: Industrial Power Telecom |
| Standby Current [Maximum] |
- Not Given
|
| Quiescent Current [Maximum] |
- Not Given
|
| Main I.C. Base Part |
LTC3870
LTC3880 |
| Date Created By Author | 2014-07 |
| Date Added To Library | 2016-05 |
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