DC1830B-D: 20 ~ 60Vin, 5A 4-Cell LiFePO4, Solar Charger with Maximum Power Point Control

Summary

The Demo Board DC1830B-D is a battery charger controller with maximum power point control (MPPC) featuring the LTC4000-1. MPPC extracts near maximum power from high impedance sources such as solar panels, wind turbines or fuel cells. MPPC is achieved by means of an input voltage regulation control loop. This board should be connected to a front-end DC/DC power supply for a complete charger solution.

The DC1830B is customizable to handle a wide variety of applications with output voltages from 3V to 30V and output currents up to 6.5A with the PFETs supplied, and up to 60V and/or 13A with higher voltage rating and/or added PFETs. The reference design provided with DC1830B is targeted at 4-cell LiFePO4 (14.6V/5A) applications. Other voltages can be set by changing ROFB2 and RBFB2.

The desired nominal voltage can be accurately trimmed by using trim resistors ROFBX and RBFBX. For example, for 14.4V battery float voltage, change ROFB2 and RBFB2 to 86.6k, and add 7.5M at ROFBX and RBFBX for greater setpoint accuracy. Other parameters can be adjusted to suit specific applications with guidance provided in the LTC4000-1 data sheet.

The DC1830B-D provides a simple battery-charger-controller-only solution without the PowerPath manager. It deletes the second PFET and thermal regulation circuitry. In this case, the battery is always "online" and VOUT-SYS tracks the BAT voltage.Demonstration circuit

Specifications

Manufacturer Linear Technology/Analog Devices
Category Energy Harvesting
Sub-Category Solar Battery Chargers
Eval Board Part Number DC1830B-D-ND
Eval Board Supplier Linear Technology/Analog Devices
Eval Board Normally In Stock
Application / Target Market Battery Chargers
Voltage In 20 ~ 60 V
Cell Type Lithium Iron Phosphate, LiFePO4
Voltage Out 14.6 V
Current Out 5 A
Features Auto Re-Charge
Bad Battery Detection
Current Limit (Adj. or Fixed)
Remote Sensing
Status Indication
Component Count + Extras 36 + 96
Design Author Linear Technology
Main I.C. Base Part LTC4000-1
Input Power Not given
Current In Up to 3A
Battery Capacity Not given
Date Created By Author 2012-07
Date Added To Library 2018-10

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