DC2134A: 25.2V @ 6.3A, 4.5 ~ 55V in, Battery Charger

Summary

Demonstration circuit 2134A is a high power buck-boost multichemistry battery charger featuring the LTC®4020. The board will accept an input voltage between 15V and 55V.

The float voltage of the battery output (BAT) is 25.2V, with 6.3A maximum charge current. The converter output (VOUT) has a voltage range of 21V to 28V, with 8A 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 (JP1: CC/CV, with mode pin grounded), constant-current charging (JP1: CC, with mode pin floated), or charging with an optimized 4-step, 3-stage lead-acid battery charge profile (JP1: lead acid, with mode pin connected to INTVCC).

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-DC2134A-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	4.5 ~ 55 V
Voltage Out	25.2 V
Current Out	6.3 A
Features	Bad Battery Detection Status Indication
Quiescent Current [Typical]	1.6 mA
Sleep Mode Current [Typical]	3 µA
Component Count + Extras	55 + 26
Application / Target Market	Automotive Medical Power: Industrial Power Solar Powered Back-up
Design Author	Linear Technology
Main I.C. Base Part	LTC4020
Quiescent Current [Maximum]	3 mA
Sleep Mode Current [Maximum]	6 µA
Date Created By Author	2014-03
Date Added To Library	2016-10