Features

* Provide precise measurement of effective charge of lithium ion and lithium polymer batteries

* Support smart battery specification (SBS) V1.1

* Working with the Ti BQ29311 simulation front end (AFE) protection IC, providing complete packaging electronic devices for 10.8 V or 14.4 V battery packs, rarely external components [ 123]

* Based on strong low -power RISC CPU kernel and high -performance peripherals

* Integrated flash memory does not require external configuration EEPROM

]

* Use a high-resolution 16-bit integral converter to measure the charging flow

-The resolution is better than 3 nvh

The transfer error difference is less than 1-μV

*

Use 16-bit Delta-Sigma converter for accurate voltage and temperature measurement

*

maximum battery fuel The programmable battery modeling of the table accuracy

*

Drives the 3, 4 or 5 LED display screens to display the remaining capacity

* 38 -needle TSSOP (DBT)

Application

*

Notebook Computer

* Medical and testing equipment

]

*

Portable instrument

Instructions

It is used in the battery pack or system installation

BQ2083-V1P2

SBS standard gas instrument IC can be accurate accurate Record the available power in the lithium ion or lithium polymer battery. BQ2083-V1P2 monitor the capacity and other key parameters of the battery pack, and reports the information to the system host controller through serial communication bus. It is designed to work with the BQ29311 simulation front end (AFE) to protect IC to maximize the number of functions and security, and minimize the number and cost of components in smart battery circuits. Using information from BQ2083-V1P2, the host controller can manage the remaining battery power to extend the operation time of the system as much as possible.

square figure

BQ2083-V1P2 uses a continuous sampling points converter to measure the battery charging current. For the optimization of the Kulun count in portable applications, the resolution of the self-calibrated integral converter is better than 3-NVH, and the offset measurement error is less than 1-μV (typical). forFor voltage and temperature report, BQ2083-V1P2 uses 16-bit A-D converters. Together with BQ29311, the vehicle ADC also monitors a single battery voltage in the battery pack, and allows BQ2083-V1P2 to generate the necessary control signals to achieve the safety protection required for battery balance and lithium ion and lithium polymer battery chemistry.

BQ2083-V1P2 supports smart battery data (SBDATA) commands and charging control functions. It uses the system management bus (SMBUS) 2 line protocol to communicate data. The available data includes the remaining capacity, temperature, voltage, current and remaining operation time forecast of the battery. The BQ2083-V1P2 provides LED drives and a button input to describe the remaining battery capacity from full to empty, with an increment of 20%, 25%or 33%displaying 3, 4 or 5 sections.

BQ2083-V1P2 contains 512 bytes of internal data flash memory, storage configuration information. This information includes nominal capacity and voltage, self -discharge rate, rate compensation factor, and other programmable unit modeling factor, which is used to accurately adjust the remaining capacity under the conditions of use according to time, rate, and temperature. The BQ2083-V1P2 can also be from the programmable level to the automatic calibration or learning the real battery capacity from the programmatic close level to the automatic level of the air level during the discharge cycle.

BQ29311 AFE protects IC from 3 or 4 series lithium-ion battery packs to BQ2083-V1P2, without an external regulatory circuit.

SMBUS timing figure

Function description

General operation

bq2083 -V1p2 determines the battery capacity by monitoring the charging input or the power taken from the rechargeable battery. In addition to measuring charging and discharge, the BQ2083-V1P2 also measures the battery voltage, temperature and current. It is estimated that the battery is self-discharged and monitor the low voltage threshold of the battery. BQ2083-V1P2 measures the charge and discharge activity by monitoring a small-value series sensor between the negative polar end and the battery group negative extreme of the battery pack. Determine the measured battery power through monitoring the voltage and correction environment and working conditions.

BQ2083-V1P2 and BQ29311 interface to perform battery protection, battery balance and voltage conversion function.

BQ2083-V1P2 can accept any NTC thermistor (the default value of SEMITEC 103AT) for temperature measurement, or it can also be configured to use its internal temperature sensor. BQ2083-V1P2 uses temperature monitoring battery pack and compensates for self-discharge estimates.

Measure

BQ2083-V1P2 Use points SIGMA-DELTA modulus converter (ADC) The current measurement is performed, and the battery voltage and temperature measurement is used to use the second Sigma-Delta ADC. The voltage, current and temperature measurement per second.

Charging and discharge meter

Integrated ADC to measure the battery's charging current by monitoring the small value sensor between SR1 and SR2 pins, as shown in the schematic diagram. Integral ADC measurement from -0.3 to 1.0 v. When VSR V (SR1) -v (SR2) is positive, BQ2083 – V1P2 detects charge activity. When VSR V (SR1) -v (SR2) is negative, detect discharge activity. Over time, the BQ2083-V1P2 uses the internal counter to continuously integrate signals. The basic rate of counter is 2.6nvh. BQ2083-V1P2 is updated to the remaining capacity () per second, and updated the charging or discharge record accumulated in the internal counter.

Disposal calibration

BQ2083-V1P2 provides an automatic calibration function to eliminate the voltage offset error between SR1 and SR2, thereby obtaining the maximum charge measurement accuracy. BQ2083-V1P2 perform automatic calibration when the SMBUS line keeps low at least 20 seconds. The BQ2083-V1P2 can automatically lower the offset of as low as 1 μV.

Digital filter

BQ2083-V1P2 does not measure the charging or discharge count below the digital filter threshold. The digital filter threshold is programmed in the digital filter DF 0x2b, and it should be set enough to prevent fake signal detection from the absence of charge or the discharging current.

Voltage

When monitoring the charging current of SR1 and SR2, BQ2083-V1P2 monitors the voltage of a single series unit through BQ29311. BQ2083-V1P2 configures the BQ29311 to display the options to the VCELL tube foot of BQ29311. The VCell tube foot should be connected to the VIN of BQ2083-V1P2. Then, the internal ADC measurement voltage of the BQ2083-V1P2 is appropriately zoomed in. Then, the voltage () and a single battery voltage in the BQ2083-V1P2 report in VCell1, VCell2, VCell3, and VCell4 in 0x3C-0x3F.

Current

BQ2083-V1P2 uses SR1 and SR2 input to measure and calculate the battery charging current indicated in the data register Current ().

Temperature

The TS input of BQ2083-V1P2 measures the battery temperature with NTC thermistor, as shown in the schematic diagram. BQ2083-V1P2 report temperature.

Set the IT bit in MISC configuration DF 0x2A, and the BQ2083-V1P2 can also be configured to use its internal temperature sensor. If the internal temperature sensor option is selected, the data flash memory position DF 0xa4 to DF 0xad must also be changed to the specified value.

Gas meter operation

If AD LT; minimum temperature AD, the temperature the highest temperature

Others: temperature (A3 × × × × × × × × × × AD × 2^-16+A2) × AD × 2^-16+A1) × AD × 2^-16+A0)

General Overview in FIG. 3 explains BQ2083-V1P2's gas meter operation. Table 3 describes the BQ2083-V1P2 register.

BQ2083-V1P2 collects the measurement value of charging and discharge current, and estimates the self-discharge of the battery. BQ2083-V1P2 compensate the battery temperature and charging current measurement. BQ2083-V1P2 also adjusts self-discharge estimates based on temperature.

The main charging counter RemainingCapAcity () (RM) indicates the available capacity or energy of the battery at any given time. BQ2083-V1P2 adjusts RM based on charging, self-discharge and other compensation factor. The information in the RM register can be accessed through the SMBUS interface, or it can be represented by the LED display.

FullChargeCapAcity () (FCC) register represents the battery that was measured last time. It is used as a reference for the battery to show the relative capacity. BQ2083-V1P2 updates the FCC after the battery is close to the full power to the low power volume. FCC can be accessed through the SMBUS interface.

The discharge counting register (DCR) is an irreplaceable register that tracks the battery discharge. The BQ2083-V1P2 uses a DCR register to update the FCC register, provided that the battery is qualified from the battery from close to full power to low power. In this way, the BQ2083-V1P2 can understand the actual discharge capacity of the battery under the use of the system.

Main gas meter record

The function of the gas meter register is shown in Table 3.

The remaining capacity (RM)

RM represents the remaining capacity of the battery. BQ2083-V1P2 Calculate RM based on the selected mode based on the Midaho or 10 MW time. For relevant unit configuration, please refer to the battery mode () (0x03).

RM counts the maximum value of the FCC during the charging, the maximum value of the maximum value of the FCC during the discharge period, and the minimum value of the 0 to 0 during the self -discharge period. In addition to charging and self-power release compensation, BQ2083-V1P2 is inThree low battery voltage thresholds, EDV2, EDV1 and EDV0, and three programmable mid -end threshold VOC25, VOC50 and VOC75 calibrated RM. This provides a voltage -based calibration for the RM counter.

Design capacity (DC)

DC is the full capacity of the battery specified by the user. It is calculated based on the battery pack capacity DF 0x31-0x32, and is expressed in units of Nazaho or 10 MWh. It also represents the full battery reference of the absolute display mode.

Full capacity (FCC)

FCC is the last measured battery discharge capacity. It is expressed in the units of Mianho or 10 MWh, depending on the selected mode. At initialization, the BQ2083-V1P2 set the FCC to the value stored in the last measured DF 0x35-0x36. During the subsequent discharge process, the BQ2083-V1P2 updated the FCC with the last measured battery discharge capacity. The last measuring discharge of the battery is based on the value in the DCR register after the qualified discharge. After the update, the BQ2083-V1P2 writes the new catalytic cracking value into the data flash (in the units of the time of the milliamp) to the final measurement. FCC represents a complete battery reference calculation of relative display modes and relative charging status.

discharge counting register (DCR)

DCR register is counted during discharge, which has nothing to do with RM. DCR statistical discharge activity, battery load estimation and self -discharge increment. When the RM is close to the programming value of DF 0x2F, the BQ2083-V1P2 initializes the DCR to FCC-RM at the beginning of the discharge. If SC 1 (bit 5 in the instrument configuration), the initial value of the DCR of FCC-RM is reduced by FCC/128, and if SC 0, it will not be reduced. When the battery voltage reaches the EDV2 threshold, the DCR stops counting.

Capacity Learning (FCC update) and qualified discharge

If qualified emissions occur, BQ2083-V1P2 will update FCC according to the value in DCR. According to the following formulas, the new value of the FCC is equal to DCR value plus programmable close power and low power volume:

fcc (new) DCR (final) DCR (initial)+ EDV2 measurement discharge+ ((((initial) measuring discharge+ ((initial)+ EDV2+ EDV2+ EDV2 measuring discharge+ (( FCC *battery power is low%)

Battery power is low% (value stored in df 0x2e) ÷ 2.56

If the battery discharge from RM ≥ FCC's negative electrode near EDV2, the battery is close to EDV22 If the voltage threshold, qualified discharge will occur:

There is no effective charging activity during discharge. Effective charging refers to charging 10 mAh in the battery.

During discharge, self -discharge or battery load is estimated to exceed 256 mAh.

When EDV2 is detected, the temperature will not be lower than the low temperature threshold of programming in low temperature DF 0x9b.

During the discharge, the battery voltage reaches the EDV2 threshold, and when the BQ2083-V1P2 detects EDV2, the voltage is greater than or equal to the EDV2 threshold minus 384 MV.

During the discharge process, no medium voltage correction occurred.

When reaching EDV2 or a battery low%level, the current is kept ≥3C/32.

When the EDV2 threshold or RM () is reduced to a low of the battery power, there is no overload.

When the qualified unloading starts, the BQ2083-V1P2 sets the VDQ 1 to the packaging state. If any unqualified situation occurs, BQ2083-V1P2 is set to VDQ 0. During any update cycle, FCC cannot reduce more than 256 mAh or increased by more than 512 mAh. BQ2083-V1P2 saves the new FCC value within 4 seconds after the update to data flash memory.

The ending threshold and capacity correction of discharge end

BQ2083-V1P2 monitor the three low voltage thresholds of the battery: EDV0, EDV1 and EDV2. The EDV threshold is programmable to be determined based on the overall packaging voltage or a single unit level. The EDVV bit configuration in the package is configured with the total voltage or single battery EDV threshold of BQ2083-V1P2. If programming is used for single battery EDV measurement, BQ2083-V1P2 is determined based on the lowest single battery voltage. The fixed EDV threshold is programmable to EMF/EDV0 DF 0x84-0x85, EDV C0 Factor/EDV1 DF 0x86-0x87 and EDV R Factor/EDV2 DF 0x88-0x89. If the CEDV bit is set in the instrument configuration DF 0x29, the automatic EDV compensation is enabled, and the BQ2083-V1P2 calculates the EDV0, EDV1 and EDV2 threshold according to the value in DF 0x84-0x8d and the current discharge rate and temperature of the battery. If the current () exceeds the overload current threshold of programming in DF 0x58-DF 0x59, BQ2083-V1P2 will disable EDV detection. BQ2083-V1P2 restores the EDV threshold detection after the current () drops to the overloaded current threshold. Any detected EDV threshold is reset after charging, and VDQ is cleared after charging 10mAh.

BQ2083-V1P2 According to EDV threshold, the RM register is used to correct the voltage-based correction. The BQ2083-V1P2 executes EDV-based RM adjustment, and the current () is greater than C/32. If the current is less than C/32, EDV is not set. BQ2083-V1P2 Adjust RM when detecting each threshold. If the voltage threshold is reached before the corresponding discharge capacity, the BQ2083-V1P2 is reduced to the appropriate amount shown in Table 2. This decrease occurs only when the EDV threshold is detected when the EDV threshold is ≥C/32. If the RM reaches the capacity level before the voltage threshold is reached when the voltage threshold is reached, the BQ2083-V1P2 can prevent the RM from being further decreased until the battery voltage reaches the corresponding threshold when the battery voltage reaches the corresponding threshold when it is fully learned. When the non -learning discharge cycle (VDQ 0) or current lt; C/32, RM does not keep it in the relevant EDV percentage.

If the battery consumption is set to zero, EDV1 and EDV0 will be disabled.

Self-discharge

BQ2083-V1P2 estimates the self-discharge of the battery to maintain the accurate measurement of the battery capacity during the non-activity period. BQ2083-V1P2 perform self-discharge adjustments to RM () every 1/4 seconds when waking up, and regularly adjusts RM () regularly in the sleep mode. The cycle is determined by the sleep timer df 0xe7.

The self -discharge estimation rate of 25 ° C is doubled at 25 ° C or more every 10 degrees, or at half 10 degrees below 25 ° C. The following table shows the relationship between self -discharge estimation rate and 25 ° C programming rate at a given temperature (programming in DF 0x2C is Y%per day).

FIG. 4 illustrates the relationship between the self -discharge estimation algorithm to adjust the remaining capacity () and temperature.

Battery electronic load compensation

BQ2083-V1P2 can be configured to compensate the constant load in the battery set at any time (such as loads from battery electronic equipment). When the charging is less than the digital filter, the BQ2083-V1P2 continuous application compensation. BQ2083-V1P2 also applies compensation in addition to self-discharge. Compensation is performed at a rate determined by the value stored in the electronic load DF 0x2D. The compensation range is 0 μA – 765 μA, which is carried out in a step -length of about 3 μA.

Middle capacity correction

When VCOR is set in the instrument configuration DF 0x29, the BQ2083-V1P2 application medium-range capacity correction. BQ2083-V1P2 adjusts RM to related percentage at three different voltage levels: VOC25, VOC50 and VOC75. VOC value indicates the battery voltage, and the RM corresponds to the correlation value of each threshold.

To perform median correction, the temperature must be between 19 ° C and 31 ° C (including 19 ° C to 31 ° C). Between An and 0. As shown in Table 5, the BQ2083-V1P2 is modified. In order to correct, BQ2083-V1p2 must detect the need for two correction during the subsequent 20-S interval. In the case of the VCOR bit settings, as long as the conditions permit, the BQ2083-V1P2 is centered. If the OTVC bit is set in the instrument configuration DF 0x29 and VCOR 0, the BQ2083-V1P2 will be immediately corrected by a medium-range correction after the device is reset, and no second verification is required.

Charging control

Charging voltage and current broadcast

BQ2083-V1P2 to broadcast the charging current () and charging voltage () to broadcast to to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to the broadcast to broadcast to the broadcast to the broadcast to broadcast to the broadcast to the broadcast to the broadcast to broadcast to the broadcast. Smart charger address to support SBS charging control. BQ2083-V1P2 broadcasts requests every 10 seconds. BQ2083-V1P2 updates the value of charging current and temperature in the charging status, voltage and temperature of the battery. The charging voltage is programmed in the charging voltage DF 0x039-0x3A. The charging current can be used for four different values: fast charging current DF (0x3D –0X3C), maintenance charging current DF 0x3F, pre -charging current (0x41) or 0. The charging current depends on the charging status and working conditions.

BQ2083-V1P2 internal charge control is compatible with the constant current/constant voltage curve of lithium ions. BQ2083-V1P2 detects the termination of primary charge based on the gradually reduced charge current in the constant voltage stage.

Alarm broadcast to smart charger and host

If any bit of BatteryStatus () is set at 8-15, then BQ2083-V1P2 will broadcast Alarmwarning () to the host address. If any 12-15 bits in BatteryStatus () are set, the BQ2083-V1P2 will also send a AlarmWarning () message to the smart charger address. BQ2083-V1P2 repeats the Alarmwarning () message every 10 seconds until the alarm position is cleared.

Pre-charging Qualification

Under the following conditions, BQ2083-V1P2 sets the charging current () to program pre-charging rate in programming in pre-charged current DF 0x41:

Voltage : When the voltage () drops below the pre-charging threshold or detects the EDV0 threshold, the BQ2083-V1P2 requests a pre-charging charging rate. Once request, the pre -charging rate will be maintained until the voltage () increases above the pre -charging threshold, and the EDV0 conditions do not exist. Pre-charging threshold programming is pre-charged voltage DF 0x3B-0x3C.

Temperature: When the pre-charging threshold set between the temperature () in 0 ° C and pre-charging temperature 0x43, the BQ2083-V1P2 requests a pre-charging rate. Temperature () must be 3 ° C higher than the pre -charging temperature,To allow fast charging.

Note: If the current () is lower than the charging detection current (df 0xe9, 0xea), the mint of programming in programming will be closed to reduce the power consumption.

Charging pause

If BQ2083-V1P2 detects the charging failure, it can temporarily suspend charging. The charging failure includes the following situations.

Over current: When the BQ2083-V1P2 measures the charging current is equal to or greater than the over-current margin and the charging current, there is an over-current situation. Over -current margin is programmed in df 0x5c 0x5d. When the current is detected, the BQ2083 V1P2 sets the charging current () to zero, and the termination alarm position is set to the battery status (). When the measurement current drops below the overcurrent margin, over -current status and termination of charging alarms are cleared.

Overvoltage: When the BQ2083-V1P2 measures the battery voltage greater than the overvoltage and the charging voltage (), or when the battery voltage exceeds the overvoltage of the battery overvoltage, Essence Overvoltage margin is programmed in DF 0x5A-0x5B, and the unit's overvoltage is programmed in DF 0x60. When the voltage situation is detected, the BQ2083-V1P2 is set to zero the charging current (), and the termination of the terminal () terminal () terminal () set the termination of the charging alarm position to zero. BQ2083-V1P2 is terminated. BQ2083-V1P2 continues to broadcast zero-charging current until the overvoltage conditions are cleared. When the measured battery voltage is lower than the charging voltage () plus overvoltage, and all battery voltage is less than DF 0XCF, the battery overvoltage threshold in 0xd0 is cleared.

Excessive heat: When the temperature () is greater than or equal to the maximum temperature value of programming in DF 0x53, 0x54, an overheating situation is existing. When the ultra-temperature situation is detected, the BQ2083-V1P2 sets the charging current () to zero, and sets the termination of the charging alarm position () and the CVOV bit in the state of the battery pack. When the temperature () is equal to () or lower than (the maximum temperature-temperature lags behind DF 0x55, 0x56) or 43 ° C, the ultra-temperature state is cleared.

Over charging: If the battery charges the battery over the maximum over recharge after RM FCC, there is a overcharge situation. The maximum charging is programmed in DF 0x4E-0x4F. When the charging situation is detected, the BQ2083-V1P2 sets the charging current () to zero, and sets the overcharge alarm, termination of charging alarms and the complete charging level in the battery state to (). When the BQ2083-V1P2 detects the battery no longer charging, it will clear the termination of the charging alarm; when the measurement is measured to 2mAhWhen discharge, it will clear the charging alarm. The complete charging space is kept set, and the BQ2083-V1P2 continues to broadcast a zero charging current until the complete charging percentage of programming that is less than the programming in the RelativeStateofcharge () less than the programming. Used to track the capacity of over -filled capacity, discharge and reset at 2 mAh.

Implit temperature: If the temperature () lt; 0 ° C, there is a temperature condition. When detecting the heating conditions, the BQ2083-V1P2 sets the ChargingCurrent () to zero. BQ2083-V1P2 sets the charging current () to an appropriate pre-charging rate, or a fast charging rate is set when the temperature () is greater than 0 ° C.

One charging termination

If the BQ2083-V1P2 detects the termination conditions based on current cones, it terminates the charge. Charging termination conditions include:

For the current of the current, the charging voltage () must be set to the set voltage required for the charging constant voltage stage. When the battery pack voltage is greater than or equal to the charging voltage (), the current cone equivalent equivalent voltage in DF 0x4A is reduced, and the charging current is lower than the threshold determined by the current cone threshold of the current in DF 0x48-0x49 At 22.5 mAh, BQ2083-V1P2 detected the current tater.

Once the BQ2083-V1P2 detects the termination of the main charge, BQ2083-V1P2 is set in BatteryStatus () to set the termination of the charge alarm and complete charge position, and set the charging current () to the maintenance charging current DF 0x3F, 0x40 programming Maintain the charging ratio. At the time of termination, the BQ2083-V1P2 also set the programming percentage of RM to FCC, provided that the RelativeStateofcharge () is lower than the required FCC percentage, and a CSYNC bit is set in the instrument configuration DF 0x29. FCC's programming percentage, fast charging terminate percentage, set in DF 0x46. When RelativeStateOfcharge () is less than a complete charging percentage of programming, BQ2083-V1P2 is cleared to clear the full charging. When the position of the fully charging position is cleared and the voltage and temperature allow it, the BQ2083-V1P2 broadcasts the fast charging ratio. When the BQ2083-V1P2 is no longer detected by the battery is charging or the termination conditions are no longer detected, it will remove the termination of the charging alarm. BatteryStatus () alarm and status operation abstract see Table 6.

Note: AC () Average current (), C () current (), CV () charging voltage (), charging current () ), V () voltage (), t () temperature (), TCA terminate the charging alarm, OTA too high temperature alarm,OCA over charge alarm, TDA terminate discharge alarm, FC complete charging, FD complete discharge, RSOC () relative charge. RM () remaining capacity (), RCA the remaining capacity alarm, RTA the remaining time alarm, atte () the average time to the empty value (), RTA () the remaining time alarm (), RCA () remaining capacity alert (), LTF low temperature failure threshold, FCC () complete charging capacity.

Unit balance

During the charging period, BQ2083-V1P2 is used to balance the battery to balance the battery balance threshold DF 0xd7-0xd8 by discharging the battery to the battery. The minimum balance data box in the unit is 0xdb. For unit balance, the BQ2083-V1P2 uses the interval measurement unit voltage set in the unit balance interval DF 0xDC. According to the battery voltage, when all batteries exceed the battery balancing threshold or the maximum battery exceeds the battery balance window, the BQ2083-V1P2 either chooses appropriate battery discharge or adjusts the battery balance in the value of programming in the battery balance window 0xd9-0xda. Threshold.

The battery balance threshold is reset to the value of the battery balance threshold at the beginning of each charging cycle. Within a balance interval, the threshold can be adjusted up to once.

Display port

General

Display port driving 3, 4 or 5 LED bar charts display. The display is activated by the logic signal on the DISP input. BQ2083-V1P2 can display RM in a relative or absolute mode, each LED represents the percentage of the entire battery reference. In the relative mode, BQ2083-V1P2 uses FCC as the entire battery reference; in an absolute mode, the design capacity (DC) is used.

The DMODE bit in the block configuration DMODE is absolute or relative display mode programming BQ2083-V1P2. LED bit programming 3, 4 or 5 LED options.

Activation

The display can be activated at any time through the conversion from high to low in the DISP input. This is usually achieved by a pull -up resistor and a button switch. The conversion will activate the display and start a 4 -second display timer. Reconstruction the display requires the DISP to enter the back logic high state, and then convert the low state again. The second conversion from high to low can only be detected only after the timer expires. If not, the display input must be pulled to VCC.

If EDV0 is set, BQ2083-V1P2 will disable LED display.

Display mode

In relative mode, each LED output represents 20%, 25%or 33%of the relative charge value. In the absolute mode, each LED loses20%, 25%or 33%of the absolute charging state () value. Table 7 shows 5 LED display options 8 displayed 4 LEDs, Table 9 shows 3 LEDs.

In any mode, if the remaining capacity () is less than the remaining capacity ARM (), the BQ2083-V1P2 will flash the LED display. If EDV0 1, it is disabled.

Lithium ion protector control

BQ2083-V1P2 provides protection for lithium ion batteries, as shown in Table 10. BQ2083-V1P2 uses BQ29311 to measure and report a single series unit voltage. BQ2083-V1P2 determines whether the voltage protection conditions are destroyed and the corresponding control FET is determined by the I2C communication with BQ29311. It is recommended to set VOD 1 in the MISC configuration, and verify the BQ2083-V1P2 protection control through two continuous measurement.

BQ29311 can detect and protect the load from the effect of current (OC) or short circuit (SC). When the over-current or short-circuit threshold on the charging or discharge direction is broken, the BQ29311 issues alert to the BQ2083-V1P2 through the Xalert output.

BQ2083-V1P2 asserts CVOV, and instructs BQ29311 under existing overvas ), Turn off the charging FET. If the discharge current is greater than 50 mAh, the BQ2083-V1P2 will not turn off the charge FET. BQ2083-V1P2 indicates that BQ29311 no longer exists in overvoltage and ultra-temperature conditions, as well as the average current () lt; 256 mAh (if a long time is over-current to generate failure conditions), the charge field effect tube is turned on.

BQ2083-V1P2 asser