LTC6804HG-2#TRPBF

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The LTC6804HG-2#TRPBF is a battery management product from the power management integrated circuit (PMIC) family. It is used for battery cell stack monitoring, offering flexible and high accuracy performance. With a wide operating temperature range from – 40°C to + 125°C, it is ideal for high temperature cycling lithium-ion battery packs. The circuit allows up to 12 cells in a stack to be monitored simultaneously, with separate voltage and temperature measurements for each cell.

The LTC6804HG-2#TRPBF application field includes battery stacks of various types, such as lead acid, lithium-ion, nickel cadmium, and nickel-metal hydride. It can also be used in high power systems, solar energy storage systems, and hybrid electric vehicle applications. Furthermore, the device is also suitable for stationary traditional rechargeable battery applications.

The circuit is based on a fully integrated current-sense amplifier, voltage-sense amplifier, and a mixed-signal controller which provides data acquisition and communication within and between each cell in the stack. It allows for cell monitoring every 0.125s, and supports a variety of external communication protocols for battery management systems, such as CAN, LIN, I2C, and UART.

The core of the LTC6804HG-2#TRPBF is a protected analog-to-digital converter (ADC). This allows each cell in the stack to be monitored continuously and the sensed data to be communicated with external devices. The ADC also provides fault diagnosis, allowing the circuit to detect cell imbalance and anomalous over-voltage and under-voltage changes even when the battery pack is partially discharged.

The device can implement accurate cell monitoring utilizing the linear current- and voltage-sense amplifier inside. The voltage-sense amplifier is calibrated for up to 10 mV accuracy, and the current-sense amplifier provides up to 5 mA accuracy. Furthermore, the integrated analog temperature-sensing topology enables temperature monitoring with up to 1°C accuracy.

The LTC6804HG-2#TRPBF provides two distinct modes of operation: active and inactive. In active mode, the current- and voltage-sense amplifiers continuously monitor the voltage and current between each individual cell in the stack. The device also has a safety timer, which can detect unexpected communication errors before they lead to safety issues in the battery stack. The inactive mode is primarily used in cases where the battery pack has been left inactive or depleted. In this mode, the device will enter a low-power sleep state to conserve power.

In summation, the LTC6804HG-2#TRPBF is well-suited for battery stacks in a wide range of applications. It provides high accuracy measurements, while allowing cell monitoring and fault diagnosis to be implemented efficiently. It is a valuable tool for PMIC - Battery Management.

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