DS1259+

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New energy sources and smart devices such as smartphones and wearables depend heavily on advanced battery management. Li-ion batteries have become commonplace in consumer electronic products, and require precise voltage and current control when charging and discharging. The DS1259+ is a High-Side Load Switch specifically designed to address the needs of consumer and industrial applications using Li-ion batteries. The device combines a buck-boost converter, a lithium switch, and a constant current/constant voltage charger, thus providing an integrated solution that can boost supply voltage and protect the battery from over-voltage, over-current, and over-temperature conditions. In this article, we provide an overview of the DS1259+\'s application field and working principle.

The DS1259+ is a high-side load switch/DC-DC converter with an integrated buck-boost voltage regulator and a lithium switch. It is primarily used in battery protection applications, including portable consumer electronics and industrial applications, where the input can range from battery to AC/DC mains. The device is a versatile single-chip solution for the power management of Li-ion batteries and other energy sources, enabling the product design to be simple and cost effective.

The primary functions served by the DS1259+ are:

• Power management and battery protection
• AC/DC mains input conditioning and conversion
• Load switching
• Power factor corrections

The DS1259+ offers several advantages for power systems that use Li-ion batteries:

• Integrated buck-boost regulator for efficient switching between high voltage and low voltage battery types
• Charge status monitor with accurate current and voltage measurements
• Integrated circuitry for over-voltage, over-current, and over-temperature protection
• Simple, low-cost design

The DS1259+\'s working principle is based on the concept of Buck-Boost voltage conversion. The device uses a switching buck-boost regulator to convert an input voltage of up to 16.5V to an output voltage of up to 36V. During operation, the converter switches between high and low voltages, enabled by an integrated lithium switch. This allows the device to boost supply voltage and protect the battery from over-voltage, over-current, and over-temperature conditions.

The DS1259+ has several integrated features to ensure efficient power management of Li-ion batteries. The device provides adjustable current and voltage levels, allowing the user to set both the input voltage and current limits. The device also provides programmable over-voltage protection and over-current protection, allowing the device to shut down the system in the event of an fault condition. Finally, the device also provides a temperature limit, allowing the user to set a temperature above which the device will shut down. This helps to prevent damage to the Li-ion battery caused by overheating.

In conclusion, the DS1259+ is a high-side load switch designed for power management and battery protection in Li-ion battery systems, such as those in portable consumer electronics and industrial applications. The device offers a variety of features, including buck-boost voltage conversion, adjustable current and voltage limits, and programmable over-voltage and over-current protection, as well as a temperature limit. The DS1259+ is a cost effective, single-chip solution that is suitable for a range of applications.

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