Evaluating the LTC4162L

Supported Evaluation Boards

Overview

Demonstration circuit DC2038A shows the LTC4162 multicell step-down battery charger with PowerPathâ„¢ and I2C telemetry operating with a configurable chemistry and cell count. The LTC4162 supports up to eight cells for Li-Ion, nine cells for LiFePO4, and 6V, 12V, 18V, or 24V lead-acid batteries. Programmable and fully autonomous charge algorithms can be chosen for each of the chemistries.

The DC2038A is populated with one of the six adjustable LTC4162 variants, each suited to a specific battery chemistry and default MPPT enabled state. For more information, refer to the DC2038A demo manual.

Hardware Specifications

Power Supply Requirments

For this specific project, the DC2038A is powered by the 3V3 supply from the MAX32666FTHR.

Board Connector and Jumper Settings

Pin Description

Please see the following table for the pin assignments:

Name

Description

VDD

Connect to 3V3 supply

GND

Connect to Ground

SCL

Connect to I2C Clock (SCL)

SDA

Connect to I2C Data (SDA)

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 LTC4162L

  • gets the battery count

  • gets the chemistry type

  • reads battery voltage

  • reads average battery voltage

  • reads battery current

In order to build the basic example 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 = y
IIO_EXAMPLE = n

IIO Example

This project is actually a IIOD demo for DC2038A. The project launches a IIOD server on the board so that the user may connect to it via an IIO client.

Using IIO-Oscilloscope, the user can configure the device.

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 LTC4162L 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:

LTC4162L Pin

Function

MAX32666FTHR Pin

VDD

VDD

3V3

SCL

I2C Clock (SCL)

P0_6 (I2C0_SCL)

SDA

I2C Data (SDA)

P0_7 (I2C0_SDA)

GND

Ground (GND)

GND

Build Command

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