參數(shù)資料
型號(hào)： LTC6801IG#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36
封裝： LEAD FREE, PLASTIC, SSOP-36
文件頁(yè)數(shù)： 4/28頁(yè)
文件大?。?/td> 265K
代理商： LTC6801IG#PBF
LTC6801
12
6801fb
OVERVIEW
The LTC6801 is designed as an easy to implement, low-
cost battery stack monitor that provides a simple indica-
tion of correct battery stack operation without requiring
a microcontroller interface. For battery stack monitoring
with cell voltage read back and discharge circuitry, refer
to the LTC6802 battery stack monitor data sheet.
The LTC6801 contains a 12-bit ADC, a precision voltage
reference, sampled comparator, high voltage multiplexer
and timer/sequencer. During normal operation, the se-
quencer multiplexes the ADC inputs between each of the
channel input pins in turn, performing a single compari-
son to the undervoltage and overvoltage thresholds. The
VTEMP inputs are also monitored for an undervoltage at a
xed threshold of VREF/2.
The presence of a status output clock indicates the system
is “OK”. Becase the status output is dynamic, it cannot
get stuck in the “OK” state.
STACKED OPERATION
Each LTC6801 monitors a group of up to 12 series con-
nected cells. Groups of cells can be connected in series
or parallel to form a large battery pack. The LTC6801s can
be daisychained with simple capacitive or transformer
coupling. This allows every cell in a large battery pack
to be monitored with a single signal. Figure 2 illustrates
monitoring of 36 series connected cells.
To cancel systematic duty cycle distortion through the
clock buffers, it is recommended that the clock lines are
cross-coupled (EOUT goes to EIN etc.) as they route up
and down the stack as shown in Figure 2.
APPLICATIONS INFORMATION
INDEPENDENT OPERATION
Figure 3 shows how three groups of 12 cells can be
monitored independently.
REGULATED OUTPUTS
A regulated voltage is provided at the VREG pin, biased from
the battery stack. The VREG pin can supply up to 4mA at
5V and may be used to power small external circuits. The
regulated output remains at 5V continually, as long as the
total stack voltage is between 10V and 50V.
A low current, precision reference voltage is provided at
the VREF pin, which can drive loads of greater than 100k.
The VREF output is high impedance when the LTC6801
is idle.
Both the VREG and VREF pins must be bypassed to V– with
a 1μF capacitor.
CONTROL INPUTS
The LTC6801 thresholds are controlled by the UV1, UV0,
OV1 and OV0 pins. These pins are designed to be tied
directly to VREG, VREF or V– in order to set the comparison
thresholds for all channels simultaneously. The pins are
not designed to be variable. In particular, changes made
to the pins while the chip is not in idle mode may result
in unpredictable behavior. See Tables 1 and 2 for setting
and threshold information.
相關(guān)PDF資料
PDF描述
LTC693IS#PBF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
LTC694CN-3.3 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8
LTC694IN-3.3 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8
LTC694CN8-3.3#TRPBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8
LTC695CN-3.3#TRPBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC6801IGTRPBF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Independent Multicell Battery Stack Fault Monitor
LTC6802-1 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Multicell Battery Stack Monitor
LTC6802-1_1 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Multicell Battery Stack Monitor
LTC6802-2 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Multicell Battery Stack Monitor
LTC6802IG-1 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Multicell Battery Stack Monitor
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