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UC2849DWTR

产品分类: 电源管理芯片(PMIC)
厂牌: TEXAS INSTRUMENTS
产品描述: 8V 20V SOIC-24 贴片安装,黏合安装
供应商型号: 25E-UC2849DWTR
供应商: 国内现货
标准整包数: 1
TEXAS INSTRUMENTS 电源管理芯片(PMIC) UC2849DWTR

UC2849DWTR概述

    Advanced Secondary Side Average Current Mode Controller: UC3849
    1. Product Introduction
    The UC3849 family of average current mode controllers is designed to perform secondary-side average current mode control with exceptional accuracy. These controllers regulate the secondary side output voltage by sensing the output voltage and the differential AC switching current. A voltage error amplifier drives the sensed output voltage, while a high bandwidth, low offset current sense amplifier monitors the AC switching current via a current sense resistor. The outputs of both the voltage error amplifier and the current sense amplifier feed into a high bandwidth, integrating current error amplifier. The sawtooth waveform generated at the current error amplifier's output represents the amplified and inverted inductor current sensed through the resistor. This slope compensation mechanism ensures accurate and fast transient responses during load changes.
    The UC3849 family excels in practical secondary-side control for isolated power supplies. It supports advanced features like load sharing, oscillator synchronization, undervoltage lockout, and programmable output control. Multiple devices can be synchronized to operate efficiently, with up to ten UC3849 chips connected in parallel for optimal load distribution. The UC3849 is highly suitable for applications requiring high-power secondary-side average current mode control.
    2. Technical Parameters
    The following table summarizes the key technical specifications of the UC3849:
    | Parameter | Min | Typ | Max | Units |

    | Supply Voltage (VCC) | 8 | 12 | 20 | V |
    | Timing Resistor (RT) | 1k | 4530 | 200k | Ω |
    | Timing Capacitor (CT) | 75pF | 345pF | 2nF | F |
    | Current Sense Amplifier
    | Input Bias Current (Ib) | 0.5 | 3 A |
    | Output Voltage (Voh/Vol) | 3.8 6.3 | V |
    | Current Error Amplifier
    | Gain Bandwidth Product (GBW)| 4.5 | 7 MHz |
    | Undervoltage Lockout (UVLO) | 8.4 V |
    Additional specifications include excellent load regulation, PSRR (Power Supply Rejection Ratio) of 80dB, and an oscillator frequency range of 450–550kHz. The UC3849 supports up to ten devices sharing a common load, making it ideal for high-power parallel operation.
    3. Product Features and Advantages
    The UC3849 boasts several standout features that make it a superior choice for modern power electronics:
    - Secondary-Side Control: Achieves accurate average current mode control with differential AC current sensing.
    - High Performance: Operates up to 1MHz and supports wide bandwidth amplifiers for fast transient response.
    - Load Sharing: Supports up to ten devices in parallel, enhancing reliability and flexibility.
    - Programmable Control: Offers programmable maximum duty cycle, adjustable ILIM pin for output current limiting, and easy synchronization capabilities.
    - Wide Operating Range: Functional across input voltages of 8–20V, making it versatile for various power supply designs.
    These features ensure high efficiency, stability, and precision in complex power conversion scenarios.
    4. Application Case Studies and Usage Recommendations
    The UC3849 is widely employed in applications such as isolated power supplies, telecom rectifiers, and high-power inverters. Here are some recommended use cases and optimization tips:
    - Application Example 1: Telecom Rectifier
    - Use the UC3849 in multi-phase rectifiers to improve load sharing across phases and minimize output ripple.
    - Ensure proper sy

UC2849DWTR参数

参数
应用场景 -
最大工作供电电压 20V
最小工作供电电压 8V
工作电源电流 -
最大输出电压 -
最小输出电压 -
通用封装 SOIC-24
安装方式 贴片安装,黏合安装
零件状态 停产
包装方式 散装,卷带包装

UC2849DWTR厂商介绍

Texas Instruments(简称TI),是一家总部位于美国德克萨斯州达拉斯的全球性半导体设计与制造公司,成立于1930年。TI是全球领先的模拟技术、数字信号处理和微控制器(MCU)领域的供应商。

主营产品分类:
1. 模拟产品:包括电源管理、信号链和接口产品,广泛应用于工业、汽车、医疗等领域。
2. 嵌入式处理:包括微控制器(MCU)、数字信号处理器(DSP)和处理器,广泛应用于消费电子、工业控制、汽车电子等领域。
3. 无线产品:包括无线通信模块和解决方案,应用于物联网、智能城市、智能家居等领域。
4. 计算器:TI也是知名的计算器制造商,拥有多款科学计算器和图形计算器产品。

应用领域:
TI的产品和技术广泛应用于通信、计算机、消费电子、汽车、工业、医疗等多个领域。

优势:
1. 技术创新:TI在模拟、嵌入式处理和无线通信领域拥有强大的研发实力和专利技术。
2. 产品多样性:TI提供广泛的产品线,满足不同客户的需求。
3. 客户支持:TI在全球设有技术支持中心,为客户提供专业的技术支持和解决方案。
4. 供应链管理:TI拥有强大的供应链管理能力,确保产品的稳定供应和交付。

UC2849DWTR数据手册

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TEXAS INSTRUMENTS 电源管理芯片(PMIC) TEXAS INSTRUMENTS UC2849DWTR UC2849DWTR数据手册

UC2849DWTR封装设计

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价格梯度 中国香港交货 内地交货(含增值税)
10+ ¥ 43.5723
5000+ ¥ 41.6219
10000+ ¥ 40.1141
库存: 765
起订量: 230 增量: 0
交货地:
最小起订量为:10
合计: ¥ 435.72
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