DS1259N

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Function:	Power Management
Battery Chemistry:	--
Number of Cells:	--
Fault Protection:	--
Interface:	--
Operating Temperature:	0°C ~ 70°C (TA)
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-PDIP
Base Part Number:	DS1259

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Power Management Integrated Circuit (PMIC) refers to an integrated circuit that is mainly used to manage the flow and distribution of electrical power in an electrical system. Among various types of PMIC, Battery Management is especially important for proper power system design and operation. The DS1259N is a PMIC designed to allow designers to create and manage energy storage units (ESUs), such as batteries, rechargeable supercapacitors, and fuel cells.The DS1259N is a highly integrated PMIC that combines voltage regulation, battery protection, fuel gauging, data logging, and configuration features into a single 8-pin package. Its main functions include input voltage regulation, battery charger and discharger control, battery Fuel Gauging, overvoltage and overcurrent protection, pre-charged battery initialization, monitoring and data logging, and support for custom configuration settings.

Input Voltage Regulation

The DS1259N can regulate a wide range of input voltages from 4.5V to 18V. It uses a 1.8-V bandgap reference and error amplifiers to monitor and control the input voltage. A comparator is used to compare the error amplifier output to a configurable 3V threshold, and when the input voltage exceeds this limit, the comparator triggers a shutdown signal.

Battery Charger and Discharger Control

The DS1259N provides an integrated Buck converter to efficiently charge and discharge batteries. It is optimized for the most versatile Li-ion batteries, but other cell chemistries such as NiMH and NiCd can also be supported. The charger features programmable charge current and voltage, and discharge current limit settings, so that it can be easily tailored for a wide range of applications. The device also features an adjustable charge termination threshold, and allows for a temperature-based charger rate limiting to prolong battery life.

Battery Fuel Gauging

The DS1259N provides an integrated fuel gauging solution. The device automatically calculates the state-of-charge (SOC) and state-of-health (SOH) of the battery, based on real-time voltage and current measurement. It also provides an efficient self-discharge monitoring solution, which can detect gradual deterioration of the battery over time.

Overvoltage and Overcurrent Protection

The DS1259N also incorporates multiple protection features to protect the battery from overvoltage and over-current conditions. For overvoltage protection, it features a configurable protection threshold, a configurable voltage limit, and programmable current rating. For over-current protection, it features a programmable current limit threshold and configurable latch/clamp type settings.

Pre-charged Battery Initialization

The DS1259N also provides a pre-charged battery initialization feature, which is used to reduce charging time when the initial battery voltage is higher than the specified charge voltage. The device automatically discharges the battery to the correct voltage, before initiating charging.

Monitoring and Data Logging

The device provides an integrated monitoring solution to track battery parameters such as voltage, current, temperature, and SOC. The data is logged and stored in memory, and can be accessed through an I2C interface. This feature is especially useful for system design, as it allows designers to optimize components for the most efficient performance.

Custom Configuration Setting

The device also supports custom configuration settings, which can be used to optimize the behavior of the device for specific applications. These parameters can be programmed through the I2C interface and are stored in non-volatile memory. In conclusion, the DS1259N is a highly integrated PMIC that combines voltage regulation, battery protection, Fuel Gauging, data logging, and configuration features into a single 8-pin package. It allows designers to create and manage energy storage units, such as batteries, rechargeable supercapacitors, and fuel cells. Furthermore, its integrated monitoring and logging solution provides valuable information for system design and optimization.

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