UCC3917D

series introduction

# UCC3917D Product Series Introduction

## 1. Overview
The UCC3917D is a highly sophisticated and versatile product series designed for critical applications in the field of power management and battery charging. Texas Instruments, a renowned leader in semiconductor technology, has engineered the UCC3917D to meet the demanding requirements of modern electronic systems, offering a comprehensive solution for battery charging control and monitoring.

## 2. Key Features

### 2.1 Multiple Battery Chemistry Support
One of the standout features of the UCC3917D is its ability to support a wide range of battery chemistries. It can handle lead - acid, nickel - cadmium (NiCd), and nickel - metal hydride (NiMH) batteries. This flexibility makes it an ideal choice for various applications where different battery types are used, such as portable electronics, automotive systems, and industrial equipment.

### 2.2 Precise Charging Control
The UCC3917D provides precise control over the charging process. It uses advanced algorithms to regulate the charging current and voltage, ensuring that the batteries are charged safely and efficiently. This helps to extend the battery life by preventing over - charging and under - charging, which are common causes of battery degradation.

### 2.3 Temperature Compensation
Temperature has a significant impact on battery charging. The UCC3917D incorporates temperature compensation functionality. It can sense the battery temperature and adjust the charging parameters accordingly. For example, in cold temperatures, the charging current may be reduced to prevent damage to the battery, while in warmer conditions, the charging process can be optimized for faster and more efficient charging.

### 2.4 Charge Termination Methods
This product series offers multiple charge termination methods. It supports both time - based and voltage - based termination. Time - based termination allows for a pre - set charging time, which can be useful in applications where a fixed charging duration is required. Voltage - based termination, on the other hand, stops the charging process when the battery reaches a specific voltage level, ensuring that the battery is fully charged without over - voltage.

### 2.5 Fault Detection and Protection
The UCC3917D is equipped with comprehensive fault detection and protection mechanisms. It can detect faults such as over - current, over - voltage, and short - circuit conditions. In case of a fault, the device will immediately stop the charging process and trigger an alarm signal, protecting both the battery and the charging system from damage.

## 3. Functional Block Diagram and Working Principle

### 3.1 Block Diagram
The UCC3917D consists of several key functional blocks, including a voltage reference, a comparator, a charge control logic unit, a temperature sensor interface, and an output driver. The voltage reference provides a stable voltage for the internal circuits, while the comparator compares the battery voltage and other parameters with the reference values. The charge control logic unit processes the comparison results and generates the appropriate control signals for the output driver, which controls the charging current and voltage.

### 3.2 Working Principle
When the charging process starts, the UCC3917D first measures the battery voltage and temperature. Based on the battery chemistry and the measured values, it determines the appropriate charging parameters, such as the initial charging current and the maximum charging voltage. As the charging progresses, the device continuously monitors the battery voltage, current, and temperature. When the battery reaches the pre - set termination conditions, the charging process is stopped.

## 4. Applications

### 4.1 Portable Electronics
In portable devices such as laptops, tablets, and smartphones, the UCC3917D can be used to manage the battery charging process. Its precise control and fault protection features ensure that the batteries in these devices are charged safely and efficiently, extending the battery life

Images for reference

16 SOIC

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Datasheets

• UCC2917/3917
• PDF 2

Partlist