Evaluating the LT7182S

The evaluation board allows the LT7182S to be powered up to default settings and produces power based on configuration resistors without the need for any serial bus communication. The board by default is set to output voltages of 1.2 V and 3.3 V for channel 0 and channel 1, respectively. Each output can supply 6A continuous and 9A maximum transient load current.

Full performance details are provided in the LT7182S data sheet, which should be consulted in conjunction with user guide.

Hardware Specifications

Power Supply Requirements

For this specific project an external power supply with output of 4V to 20V can be used to power up the demo board.

Pin Description

Pin

Name

Description

1

VEMI

Power Supply, 4V - 20V

2

GND

Connect to Ground

3

VOUT0

Connect to Load 0

4

VOUT1

Connect to Load 1

5

ALERT

GPIO (Optional)

6

EXTVCC

Do Not Connect

7

PGOOD0

GPIO (Optional)

8

PGOOD1

GPIO (Optional)

9

SYNC

Do Not Connect

10

SHARE_CLK

Do Not Connect

11

SCL

I2C Serial Clock

12

SDA

I2C Serial Data

Hardware Bringup

For reference, follow the Quick Start Procedure section of the demo board user guide.

No-OS Build Setup

Please see: https://wiki.analog.com/resources/no-os/build

No-OS Supported Examples

The initialization data used in the examples is taken out from: Project Common Data Path

The macros used in Common Data are defined in platform specific files found in: Project Platform Configuration Path

Basic example

This is a simple example that initializes the LT7182S, and performs telemetry readings of the voltage, current and temperature of each output channel. Status bytes/words are also monitored in the example.

In order to build the basic example make sure you have the following configuration in the Makefile Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = y
IIO_EXAMPLE = n

IIO example

This project is actually a IIOD demo for DC2836A evaluation board. The project launches a IIOD server on the board so that the user may connect to it via an IIO client.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS

If you are not familiar with ADI IIO-Oscilloscope Client, please take a look at: IIO Oscilloscope

The No-OS IIO Application together with the No-OS IIO LT7182S driver take care of all the back-end logic needed to setup the IIO server.

This example initializes the IIO device and calls the IIO app as shown in: IIO Example

In order to build the IIO project make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = n
IIO__EXAMPLE = y

No-OS Supported Platforms

Maxim Platform

Used hardware

Connections:

LT7182SDC1-EVALZ Pin Number	Mnemonic	Function	MAX32666FTHR Pin Number
1	VEMI	External Power Supply, 4V - 20V	Do Not Connect
2	END	Connect to Ground	GND
3	VOUT0	May connect to Scopy/Load	Do Not Connect
4	VOUT1	May connect to Scopy/Load	Do Not Connect
11	SCL	I2C Serial Clock	I2C0_SCL
12	SDA	I2C Serial Data	I2C0_SDA

Build Command

# to delete current build
make reset
# to build the project
make PLATFORM=maxim TARGET=max32665
# to flash the code
make run