BQ29330 PDF

The bq also integrates an I2C-compatible interface to extract battery parameters such as battery voltage, individual cell voltages, and control output status. Other parameters such as current protection thresholds and delays can also be programmed into the bq to increase the flexibility of the battery management system. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. In overload, short circuit in charge and short circuit in discharge conditions, the bq turns off the FET drive autonomously, depending on the internal configuration setting.

Author:Kazrabei Tojin
Country:Malaysia
Language:English (Spanish)
Genre:Medical
Published (Last):11 February 2009
Pages:163
PDF File Size:19.86 Mb
ePub File Size:10.4 Mb
ISBN:261-5-77288-663-3
Downloads:73971
Price:Free* [*Free Regsitration Required]
Uploader:Fenricage



The bq also integrates an I2C-compatible interface to extract battery parameters such as battery voltage, individual cell voltages, and control output status.

Other parameters such as current protection thresholds and delays can also be programmed into the bq to increase the flexibility of the battery management system.

Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

In overload, short circuit in charge and short circuit in discharge conditions, the bq turns off the FET drive autonomously, depending on the internal configuration setting. The communications interface allows the host to observe and control the status of the bq, enable cell balancing, enter different power modes, set current protection levels, and set the blanking delay times.

Cell balancing of each cell can be performed via a cell bypass path integrated into the bq, which can be enabled via the internal control register accessible via the I2C-compatible interface. The maximum bypass current is set via an external series resistor and internal FET on resistance typ. The bq can be ordered in tape and reel by adding the suffix R to the orderable part number, i.

Output of scaled value of the measured cell voltage. Integrated 2. Sense voltage input terminal for least positive cell, balance current input for least positive cell, and return balance current for third most positive cell. Sense voltage input terminal for third most positive cell, balance current input for third most positive cell, and return balance current for second most positive cell.

Sense voltage input terminal for second most positive cell, balance current input for second most positive cell, and return balance current for most positive cell. Open-drain serial interface clock with internal k? With internal k? These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

The output is a fixed voltage of typically 3. F and is also internally current limited. During normal operation, the regulator limits output current to typically 50 mA.

The output is typically 2. After the regulator has started, it then continues to operate through the VCC input. If the voltage at VLED falls below about 2. This feature is used to protect the pass FETs, cells, and any other inline components from excessive discharge current conditions. The detection circuit also incorporates a blanking delay before driving the control for the pass FETs to the OFF state. The thresholds can be individually programmed from 50 mV to mV in 5-mV steps with the default being 50 mV.

This safety feature is used to protect the pass FETs, cells, and any other inline components from excessive current conditions. The short circuit in charge threshold and delay time are set in the SCC register.

The short circuit in discharge threshold and delay time are set in the SCD register. The short-circuit thresholds can be programmed from mV to mV in mV steps. The delay time can be increased via the OLD register which can be programmed for a range of 1 ms to 31 ms with 2-ms steps.

These registers can be programmed from 0? In a 3-cell configuration, VC1 is shorted to VC2. The series element voltage is translated to a GND-based voltage equal to 0. This provides a range from 0 to 4. The following procedure shows how to measure and calculate the offset as an example.

VREF is trimmed to 0. The purpose of this bypass path is to reduce the current into any one cell during charging to bring the series elements to the same voltage. Series resistors placed between the input pins and the positive series element nodes control the bypass current value.

Series input resistors between ? The typical thermistor resistance is 10 k? The default state for this is OFF to conserve power. The maximum output impedance is ?. This holds the host in reset for the duration of the tRST period, allowing the VREG to stabilize before the host is released from reset.

Also, when a watchdog fault is detected, the XRST is also activated to ensure a valid reset of the battery management host. It then activates the XRST output in an attempt to reset the host.

Once the watchdog has been started during this wake-up period, it monitors the host for an oscillation stop condition which is defined as a period of tWDWT where no clock input is received. The bq then activates the XRST output in an attempt to reset the host. During Sleep mode, the watchdog function is not disabled. The host can force any FET on or off only if the bq integrated protection control allows.

The default-state of the FET drive is off. These controls are only valid when not in the initialized state. The bq also supports charging even when the battery falls to 0 V. In this case, the supply voltage for the device is too low to operate. The following table outlines the operational functions during these power modes.

Table 1. The supply current of this mode varies as the host can enable and disable various power management features.

The bq acts as a slave device and does not generate clock pulses. The slave address for the bq is 7 bits, and the value is 0x The bq is always regarded as a slave.

The bq does not support the Address Auto Increment, which allows continuous reading and writing. The bq will allow data to be written or read from the same location without re-sending the location address. These registers provide status, control, and configuration information for the battery protection system. Voltage greater than or equal to the short circuit in discharge threshold.

Voltage below the short circuit in charge threshold default. Voltage greater than or equal to the short circuit in charge threshold. Voltage less than or equal to the overload threshold default. Voltage greater than overload threshold. ZVCHG pin is not clamped default. ZVCHG pin is clamped. Discharge FET is on, and the bq is in normal operating mode. Charge FET is off, and is controlled by the system host default. Charge FET is on, and the bq is in normal operating mode.

GPOD is high impedance default. Watchdog timer enabled default Watchdog timer disabled Reset output is disabled, when watchdog timer is active default. Enable voltage monitoring. OLV b5-b7 : These bits are not used and should be set to 0. OLV b4-b0 configuration bits with corresponding voltage threshold 1 0x00 —0.

SCCV b3-b0 : These lower nibble bits select the value of the short circuit in charge voltage threshold with as the default. SCCD b7-b4 : These upper nibble bits select the value of the short circuit in charge delay time.

SCDV b3-b0 : These lower nibble bits select the value of the short circuit in discharge voltage threshold with as the default. NRND: Not recommended for new designs.

Device is in production to support existing customers, but TI does not recommend using this part in a new design. Samples may or may not be available. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free RoHS Exempt : This component has a RoHS exemption for either 1 lead-based flip-chip solder bumps used between the die and package, or 2 lead-based die adhesive used between the die and leadframe.

TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.

Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components.

To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

DURBAR TAVLEEN SINGH PDF

用BQ29330+BQ8030DBT做的笔记本电池保护板电路图

The bq also integrates an I2C-compatible interface to extract battery parameters such as battery voltage, individual cell voltages, and control output status. Other parameters such as current protection thresholds and delays can also be programmed into the bq to increase the flexibility of the battery management system. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. In overload, short circuit in charge and short circuit in discharge conditions, the bq turns off the FET drive autonomously, depending on the internal configuration setting. The communications interface allows the host to observe and control the status of the bq, enable cell balancing, enter different power modes, set current protection levels, and set the blanking delay times.

LIEBHERR LTM 1045 PDF

.

AHMET HAMDI KAYRAN PDF

.

Related Articles