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D ESCRIPTION
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Evaluation circuit DC1651A is a Battery Monitoring
System to demonstrate the functional operation of the
LTC6803-1 integrated circuit. The basic operation and
features of this demo board are the same as the
DC1331 for the LT6802-1, including the ability to dai-
sy-chain up to 10 devices with built-in board-to-board
ribbon-cable interconnects and selectively apply resis-
tive loading to any cell for purposes of "Passive Ba-
lancing."
CONFIGURATION JUMPERS
TOP
PORT
DISCHARGE SWITCHES
CELLS CONNECTOR
LTC6803-1
BOTTOM
PORT
LTC6803-1 Battery Monitor
HARDWARE/SOFTWARE USERS GUIDE
L TC6803-1 NEW FEATURES
1 B
„
Pin compatible upgrade to LT6802-1 designs.
„
Robust daisy chain SPI common-mode immunity.
„
Packet Error Checking on command writes.
„
6X lower standby current.
„
Active pullup on S pins.
„
Additional diagnostic features.
D C1651A DEMO FEATURES
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„
Controllable discharging for Passive Balancing.
„
Protection circuitry for IC and external discharge
transistors during hot plugging of cells.
„
Graphical User Interface (GUI) screen for demon-
stration of new features and program code devel-
opment.
DC1651A
June 18, 2010
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Table of Contents
Related Manuals for Linear LTC6803-1
Summary of Contents for Linear LTC6803-1
- Page 1 Evaluation circuit DC1651A is a Battery Monitoring System to demonstrate the functional operation of the „ Pin compatible upgrade to LT6802-1 designs. LTC6803-1 integrated circuit. The basic operation and „ Robust daisy chain SPI common-mode immunity. features of this demo board are the same as the „...
- Page 2 When the DC590B Quick Eval board recognizes the stack. The LTC6803-1 is intended to measure from String ID code from the DC1651A board, the pro- four to twelve individual cells with a total stack vol- gram will open and present the control screen.
- Page 3 DC1651A and the GUI program are useful to serve as a demonstration tool to highlight the features of the LTC6803-1. If actual battery cells are not available, a series string of 150: resistors connected between each of the J1 connector terminals can be used in- stead.
- Page 4 DC1651A THE CONTROL PROGRAM the operation of the LTC6803-1, but also for software developers to observe the Hex codes exchanged with the device. T HE GRAPHICAL USER INTERFACE (GUI) SCREEN The control screen makes good use of color to provide Figures 2 shows the control panel that appears on the cell status and operating conditions at a glance.
- Page 5 0x00 for the other five bytes. This default configura- back-lit illuminated. This serves as a reminder that this tion is the standby mode for the LTC6803-1. To ena- command still needs to be executed. ble the device and begin taking cell voltage mea-...
- Page 6 One of the configuration options is to mask these flags from appearing in the register bytes that are read from the LTC6803-1. This feature can be used to prevent or allow these flags to affect a control algorithm. A check...
- Page 7 The temperature indications 1 8 B box to allow individual measurements. Checking are for the internal die temperature of the LTC6803-1 these “Only” boxes sends the command (STARTCELL and two externally connected thermistors. The display VOLT then READCELL VOLT, START TEMP then READ returns a voltage measurement.
-
Page 8: O Ther Control Features
Three additional command buttons are provided on the control screen. The POLL ADC and POLL INTERRUPT Another major feature of the LTC6803-1 is the ability to command buttons are used to test if the ADC is busy remove charge from individual cells. This can help to... -
Page 9: O Ther Configuration Options
An important system consideration is the ability to put the monitoring circuitry into a low current drain condi- tion. This is done by setting the LTC6803-1 into its standby configuration. A command button in the lower right corner of the screen is provided to facilitate this function. -
Page 10: H Ardware Adjustments
2 6 B As battery cells are stacked on top of each other, great A unique characteristic of the LTC6803-1 is the ability care must be taken to prevent damage and personal to communicate serial data up and down a stack of... -
Page 11: S Oftware Adjustments
Any grayed box indicates that the cell’s interrupt flag for each board are to be the same (GLOBAL) or dif- has been masked so the LTC6803-1 is no longer re- ferent for each board (CUSTOM) and set the duty porting this status. The cell voltage value measured for cycle and voltages accordingly. - Page 14 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1651A...