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ISL9208EVAL2Z: 产品描述Power Management IC Development Tools ISL9208 EVAL RD 2 ROHS CMPL 32LD; 产品类别开发板/开发套件/开发工具; 文件大小1MB，共28页; 制造商Renesas(瑞萨电子); 官网地址https://www.renesas.com/; 标准

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ISL9208EVAL2Z概述

Power Management IC Development Tools ISL9208 EVAL RD 2 ROHS CMPL 32LD

ISL9208EVAL2Z规格参数

参数名称	属性值
Product Attribute	Attribute Value
制造商 Manufacturer	Renesas(瑞萨电子)
产品种类 Product Category	Power Management IC Development Tools
RoHS	Details
产品 Product	Development Kits
系列 Packaging	Bulk
工厂包装数量 Factory Pack Quantity	1

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DATASHEET

ISL9208

Multi-Cell Li-ion Battery Pack OCP/Analog Front End

The ISL9208 is an overcurrent protection device and analog

front end for a microcontroller in a multi-cell Li-ion battery

pack. The ISL9208 supports battery pack configurations

consisting of 5-cells to 7-cells in series and 1 or more cells in

parallel. The ISL9208 provides integral overcurrent

protection circuitry, short circuit protection, an internal 3.3V

voltage regulator, internal cell balancing switches, cell

voltage monitor level shifters, and drive circuitry for external

FET devices for control of pack charge and discharge.

Selectable overcurrent and short circuit thresholds reside in

internal RAM registers. An external microcontroller sets the

thresholds by setting register values through an I

C serial

interface. Internal registers also contain the detection delays

for overcurrent and short circuit conditions.

Using an internal analog multiplexer the ISL9208 provides

monitoring of each cell voltage plus internal and external

temperature by a separate microcontroller with an A/D

converter. Software on this microcontroller implements all

battery pack control functionality, except for overcurrent and

short circuit shutdown.

FN6446

Rev.1.00

November 2, 2007

Features

• Software selectable overcurrent protection levels and

variable protect detection times

- 4 discharge overcurrent thresholds

- 4 short circuit thresholds

- 4 charge overcurrent thresholds

- 8 overcurrent delay times (Charge)

- 8 overcurrent delay times (Discharge)

- 2 short circuit delay times (Discharge)

• Automatic FET turn-off and cell balance disable on reaching

external (battery) or internal (IC) temperature limit.

• Automatic override of cell balance on reaching internal

(IC) temperature limit.

• Fast short circuit pack shutdown

• Can use current sense resistor, FET r

DS(ON)

, or Sense

FET for overcurrent detection.

• Four battery backed software controlled flags.

• Allows three different FET controls:

- Back-to-back N-Channel FETs for charge and discharge

control

- Single N-Channel discharge FET.

- Single N-Channel FET for discharge, with separate,

optional (smaller) back-to-back N-channel FETs for

charge.

• Integrated Charge/Discharge FET Drive Circuitry with

200µA (typ) turn-on current and 150mA (typ) Discharge

FET turn-off current.

• 10% Accurate 3.3V voltage regulator (minimum 25mA out

with external NPN transistor having current gain of 70).

• Monitored cell voltage output stable in 100µs.

• Internal Cell balancing FETs handle up to 200mA of

balancing current for each cell (with the number of cells

being balanced limited by the maximum package power

dissipation of 400mW).

• Simple I

C host interface

• Sleep operation with programmable negative edge or

positive edge wake-up.

• <10µA Sleep Mode

• Pb-free (RoHS compliant)

Applications

• Power Tools

• Battery Backup Systems

• E-Bikes

• Portable Test Equipment

• Medical Systems

• Hybrid Vehicle

• Military Electronics

Ordering Information

PART NUMBER

(Note)

ISL9208IRZ*

PART

MARKING

ISL9208 IRZ

PACKAGE

(Pb-free)

32 Ld 5x5 QFN

PKG.

DWG. #

L32.5x5B

*Add “-T” suffix for tape and reel. Please refer to TB347 for details

on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets; molding compounds/die attach

materials and 100% matte tin plate PLUS ANNEAL - e3 termination

finish, which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.

FN6446 Rev.1.00

November 2, 2007

Page 1 of 28

ISL9208

Pin Descriptions

SYMBOL

VC7/VCC

VCELLN

CBN

DESCRIPTION

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.

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.

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.

Ground. This pin connects to the most negative terminal in the battery string.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

C interface.

Serial Clock.

This is the clock input for an I

C communication link.

VSS

DSREF

DSENSE

CSENSE

DFET

CFET

VMON

TEMP3V

TEMPI

RGO

RGC

WKUP

SDA

SCL

FN6446 Rev.1.00

November 2, 2007

Page 3 of 28

ISL9208EVAL2Z

ISL9208EVAL2Z在线购买

ISL9208EVAL2Z概述

ISL9208EVAL2Z规格参数

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