DC2044A: 25.2V @ 3.3A, 15 ~ 55V in, Battery Charger

Summary

Demonstration circuit 2044A is a 55V buck-boost multi-chemistry battery charger featuring the LTC4020. The board will accept an input voltage between 15V and 55V. The float voltage of the battery output (BAT) is 25.2V, with 3.3A maximum charge current. The converter output (VOUT) has a voltage range of 21V to 28V, with 3A maximum load current. The LTC4020 contains a high efficiency synchronous buck-boost DC/DC controller and uses a proprietary average current mode architecture.

The LTC4020 battery charger can provide a constant-current/constant-voltage charge algorithm (CC/CV, with MODE pin grounded), constant-current charging (CC, with MODE pin floated), or charging with an optimized 4-step, 3-stage lead-acid battery charge profile (connect MODE pin to INTVCC, with a 0Ω jumper at the optional R29 position).

The LTC4020 data sheet gives a complete description of the IC operation and application information. The data sheet must be read in conjunction with this quick start guide.

Specifications

Manufacturer	Analog Devices Inc.
Category	Power Management
Sub-Category	Battery Chargers
Eval Board Part Number	505-DC2044A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Board not Stocked
Cell Type	Lead Acid Lithium Ion, Li-Ion
Configuration	2 in Series -
Voltage In	15 ~ 55 V
Voltage Out	25.2 V
Current Out	3.3 A
Features	Bad Battery Detection Current Limit (Adj. or Fixed) Status Indication Temperature Compensation
Quiescent Current [Typical]	- Not Given
Sleep Mode Current [Typical]	- Not Given
Component Count + Extras	66 + 17
Application / Target Market	Automotive Medical Military Portable Devices Solar Powered Back-up
Design Author	Linear Technology
Main I.C. Base Part	LTC4020
Quiescent Current [Maximum]	- Not Given
Sleep Mode Current [Maximum]	- Not Given
Date Created By Author	2013-09
Date Added To Library	2016-09