Advertisement
Quick Links
DESCRIPTION
Demonstration circuit 2973A shows the
Primary Battery State of Health (SOH) monitor with pre-
cision coulomb counter operating with a configurable
peak current limit. The LTC3337 supports input voltages
from 1.8V to 5.5V and a peak current up to 100mA with a
quiescent current of 100nA. Coulomb count, battery volt-
age, and Battery Series Resistance (BSR) are measurable
and can be used to quantify the charge state and health
of a battery.
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
V
Input Voltage Range
IN
I
Output Current
OUT
BOARD PHOTO
Arrow.com.
Downloaded from
DEMO MANUAL DC2973A
Primary Battery SOH Monitor with
Precision Coulomb Counter
LTC
3337
The DC2973A demonstrates a simple layout for the high-
®
est-power configuration of the LTC3337. The circuit can
be reduced for lower I
be connected directly to a PC using a micro USB cable in
order to run a GUI and configure simple a Battery State of
Charge (SOC) monitor. Source code for the GUI is avail-
able and can be used as a starting point for LTC3337
firmware development.
Design files for this circuit board are
All registered trademarks and trademarks are the property of their respective owners.
Specifications are at T
= 25°C
A
CONDITIONS
IPK2 – IPK0 = 111
LTC3337
levels. The demo board can
PEAK
available.
MIN
TYP
MAX
1.8
5.5
100
UNITS
V
mA
Rev. 0
1
Advertisement
Related Manuals for Linear ANALOG DEVICES LTC 3337
Summary of Contents for Linear ANALOG DEVICES LTC 3337
- Page 1 DEMO MANUAL DC2973A LTC3337 Primary Battery SOH Monitor with Precision Coulomb Counter DESCRIPTION Demonstration circuit 2973A shows the 3337 The DC2973A demonstrates a simple layout for the high- ® Primary Battery State of Health (SOH) monitor with pre- est-power configuration of the LTC3337. The circuit can cision coulomb counter operating with a configurable be reduced for lower I levels.
-
Page 2: Quick Start Procedure
DEMO MANUAL DC2973A QUICK START PROCEDURE Refer to Figure 1 for the proper measurement equipment 3. Enable PS1. setup and jumper settings. Please follow the procedure 4. In the GUI, click the Battery Setup button and configure below to familiarize yourself with the DC2973A. for your chosen battery (or use the settings shown 1. -
Page 3: Software Tools
DEMO MANUAL DC2973A CONFIGURING IPEAK The peak current limit of the LTC3337 (I ) is con- Table 1. IPEAK Configuration PEAK figured by moving the JP1-JP3 shunts on the DC2973A JUMPER CONFIGURATION demo board. Note that the IPEAK setting is locked at IPK2 IPK1 IPK0... - Page 4 DEMO MANUAL DC2973A GUI APPLICATION Introduction to the GUI LTC3337’s core functionality. The Engineering tab shows all registers and is intended to be used for lower-level The LTC3337 GUI provides a graphical interface for some development and debugging purposes. The Schematic of the main features of the LTC3337.
- Page 5 DEMO MANUAL DC2973A GUI APPLICATION Engineering Tab For detailed information about a register, hovering over it for about a second will display the same tool tips as are The Engineering tab is an advanced debugging tool which visible in the other tabs of the GUI. allows high-speed reading of any register.
- Page 6 DEMO MANUAL DC2973A GUI APPLICATION Schematic Tab The Schematic Tab simply shows the DC2973A schematic for quick reference while using the GUI. Figure 4. The Schematic Tab Rev. 0 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
- Page 7 DEMO MANUAL DC2973A GUI APPLICATION Logger Window collection. Data can be exported into a CSV format (for import to Excel) or to a SQL database. Note that other GUI The Logger can be launched by going to Window ➝ tabs will be inactive while logging, so writing bitfields is Show Logger.
-
Page 8: Parts List
DEMO MANUAL DC2973A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP ., 10µF, X5R, 10V, 10%, 0603 AVX, 0603ZD106KAT2A MURATA, GRM188R61A106KAALD SAMSUNG, CL10A106KP8NNNC CAP ., 150µF, X5R, 6.3V, 20%, 1210 SAMSUNG, CL32A157MQVNNNE CAP ., 180µF, ALUM POLY, OS-CON, 25V, 20%, PANASONIC, 25SVPF180M 8mm ×... - Page 9 DEMO MANUAL DC2973A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER R8, R13, R14 RES., 2.2k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04022K20JNED NIC, NRC04J222TRF R9, R10, R11 RES., 301Ω, 1%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3EKF3010V VISHAY, CRCW0603301RFKEA NIC, NRC06F3010TRF RES., 10k, 5%, 1/16W, 0402 SAMSUNG, RC1005J103CS YAGEO, RC0402JR-0710KL...
-
Page 10: Schematic Diagram
DEMO MANUAL DC2973A SCHEMATIC DIAGRAM Rev. 0 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from... - Page 11 DEMO MANUAL DC2973A SCHEMATIC DIAGRAM Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice.
- Page 12 DEMO MANUAL DC2973A ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern.