參數(shù)資料
型號(hào)： ISL9208
廠商： Intersil Corporation
英文描述： Multi-Cell Li-ion Battery Pack OCP/Analog Front End(多節(jié)鋰離子電池組OCP/模擬前端)
中文描述： 多單元鋰離子電池OCP /模擬前端（多節(jié)鋰離子電池組OCP /模擬前端）
文件頁(yè)數(shù)： 3/28頁(yè)
文件大?。?/td> 504K
代理商： ISL9208
3
FN6446.1
November 2, 2007
Pin Descriptions
SYMBOL
DESCRIPTION
VC7/VCC
Battery cell 7 voltage input/VCC supply.
This pin is used to monitor the voltage of this battery cell externally at pin AO. This pin also
provides the operating voltage for the IC circuitry.
VCELLN
Battery cell N voltage input.
This pin is used to monitor the voltage of this battery cell externally at pin AO. VCELLN connects to the
positive terminal of CELLN and the negative terminal of CELLN + 1.
CBN
Cell balancing FET control output N.
This internal FET diverts a fraction of the current around a cell while the cell is being charged
or adds to the current pulled from a cell during discharge in order to perform a cell voltage balancing operation. This function is
generally used to reduce the voltage on an individual cell relative to other cells in the pack. The cell balancing FETs are turned on or
off by an external controller.
VSS
Ground. This pin connects to the most negative terminal in the battery string.
DSREF
Discharge current sense reference.
This input provides a separate reference point for the charge and discharge current monitoring
circuits. WIth a separate reference connection, it is possible to minimize errors that result from voltage drops on the ground lead when
the load is drawing large currents. If a separate reference is not necessary, connect this pin to VSS.
DSENSE
Discharge current sense monitor.
This input monitors the discharge current by monitoring a voltage. It can monitor the voltage
across a sense resistor, or the voltage across the DFET, or by using a FET with a current sense pin. The voltage on this pin is measured
with reference to DSREF.
CSENSE
Charge current sense monitor.
This input monitors the charge current by monitoring a voltage. It can monitor the voltage across a
sense resistor, or the voltage across the CFET, or by using a FET with a current sense pin. The voltage on this pin is measured with
reference to VSS.
DFET
Discharge FET control.
The ISL9208 controls the gate of a discharge FET through this pin. The power FET is a
N-Channel device. The FET is turned on only by the microcontroller. The FET can be turned off by the microcontroller, but the ISL9208
also turns off the FET in the event of an overcurrent or short circuit condition. If the microcontroller detects an undervoltage condition
on any of the battery cells, it can turn off the discharge FET by controlling this output with a control bit.
CFET
Charge FET control.
The ISL9208 controls the gate of a charge FET through this pin. The power FET is a N-Channel device. The
FET is turned on only by the microcontroller. The FET can be turned off by the microcontroller, but the ISL9208 also turns off the FET
in the event of an overcurrent condition. If the microcontroller detects an overvoltage condition on any of the battery cells, it can turn
off the FET by controlling this output with a control bit.
VMON
Discharge load monitoring.
In the event of an overcurrent or short circuit condition, the microcontroller can enable an internal resistor
that connects between the VMON pin and VSS. When the FETs open because of an overcurrent or short circuit condition and the load
remains, the voltage at VMON will be near the VCC voltage. When the load is released, the voltage at VMON drops below a threshold
indicating that the overcurrent or short circuit condition is resolved. At this point, the LDFAIL flag is cleared and operation can resume.
AO
Analog multiplexer output.
The analog output pin is used by an external microcontroller to monitor the cell voltages and temperature
sensor voltages. The microcontroller selects the specific voltage being applied to the output by writing to a control register.
TEMP3V
Temperature monitor output control.
This pin outputs a voltage to be used in a divider that consists of a fixed resistor and a
thermistor. The thermistor is located in close proximity to the cells. The TEMP3V output is connected internally to the RGO voltage
through a PMOS switch only during a measurement of the temperature, otherwise the TEMP3V output is off. The TEMP3V output can
be turned on continuously with a special control bit.
Microcontroller wake up control. The TEMP3V pin is also turned on when any of the DSC, DOC, or COC bits are set. This can be used
to wake up a sleeping microcontroller to respond to overcurrent conditions with its own control mechanism.
TEMPI
Temperature monitor input.
This pin inputs the voltage across a thermistor to determine the temperature of the cells. When this input
drops below TEMP3V/13, an external over-temperature condition exists. The TEMPI voltage is also fed to the AO output pin through
an analog multiplexer so the temperature of the cells can be monitored by the microcontroller.
RGO
Regulated output voltage.
This pin connects to the emitter of an external NPN transistor and works in conjunction with the RGC pin
to provides a regulated 3.3V. The voltage at this pin provides feedback for the regulator and power for many of the ISL9208 internal
circuits as well as providing the 3.3V output voltage for the microcontroller and other external circuits.
RGC
Regulated output control.
This pin connects to the base of an external NPN transistor and works in conjunction with the RGO pin to
provide a regulated 3.3V. The RGC output provides the control signal for the external transistor to provide the 3.3V regulated voltage
on the RGO pin.
WKUP
Wake up Voltage.
This input wakes up the part when the voltage crosses a turn-on threshold (wake up is edge triggered). The
condition of the pin is reflected in the WKUP bit (The WKUP bit is level sensitive.)
WKPOL bit = ”1”: the device wakes up on the rising edge of the WKUP pin. Also, the WKUP bit is HIGH only when the WKUP pin
voltage > threshold.
WKPOL bit = ”0”, the device wakes up on the falling edge of the WKUP pin. Also, the WKUP bit is HIGH only when the WKUP pin
voltage < threshold.
Serial Data.
This is the bidirectional data line for an I
2
C interface.
Serial Clock.
This is the clock input for an I
2
C communication link.
SDA
SCL
ISL9208
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL9208_0711 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Multi-Cell Li-ion Battery Pack OCP/Analog Front End
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ISL9208EVAL2Z 功能描述:EVAL BOARD 2 FOR ISL9208 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
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ISL9208IRZ-T 功能描述:IC MULTI-CELL LI-ION PROT 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
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