DS2788 Reference Design Circuit | Battery Monitor Application Circuit

The DS2788 measures the voltage, temperature, and current of rechargeable lithium-ion (Li+) and Li+ polymer batteries to estimate the battery's available power. This article mainly introduces the DS2788 features, application range, reference design circuit and circuit analysis to help you shorten the design time.

DS2788 features: 5 30mA open-drain outputs for driving LED power display; de-jumping fuel gauge display enable control; high-precision voltage, temperature, current measurement system; accurate low battery voltage alarm detection

DS2788 typical application range: digital camera; electric bicycle; electric vehicle; power tool; uninterruptible power supply

DS2788 Reference Design Application Circuit:

Figure 1DS2788 internal structure diagram

The DS2788 measures voltage, temperature, and current, and estimates available capacity for rechargeable lithium-ion (Li+) and Li+ polymer batteries. Cell characteristics and application parameters used in the calculations are stored in on-chip EEPROM.

Figure 2DS2788 reference design

The DS2788 operates directly from 2.5V to 4.5V and supports single-cell Li+ battery packs. As shown in Figure 2, the DS2788 accommodates multicell applications by adding a trim resistor for calibration of an external voltage-divider for VIN. NV storage is provided for Cell compensation and application parameters.

DS2788 Datasheet: Click to download

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