UC3843D8TR TI Current Mode PWM Controller | 8-SOIC | 8.4V/7.6V UVLO, 500kHz

Product Overview

The UC3843D8TR from Texas Instruments is a high-performance current mode PWM controller designed for off-line and DC-to-DC converter applications. It features an 8-SOIC package, providing a compact solution for power supply designs. The device operates with a supply voltage range from 7.6V to 30V and offers a switching frequency up to 500kHz. With under-voltage lockout (UVLO) thresholds of 8.4V (start) and 7.6V (stop), it ensures reliable startup and shutdown. The UC3843D8TR includes a trimmed oscillator for precise frequency control, a temperature-compensated reference, and a high-gain error amplifier. Its current mode architecture provides inherent pulse-by-pulse current limiting and improved transient response.

Detailed Technical Specifications

Key Features

• Current mode operation for improved transient response and simplified loop compensation
• Trimmed oscillator with precise frequency control
• Under-voltage lockout with hysteresis
• High-gain error amplifier
• Pulse-by-pulse current limiting
• Low startup current (typical 0.5 mA)
• Totem-pole output stage for high peak current drive

Target Applications

• AC-DC adapters and chargers for consumer electronics
• DC-DC converters for telecom and networking equipment (e.g., 5G base station power supplies)
• Industrial power supplies for automation systems
• LED lighting drivers
• Automotive power systems (e.g., infotainment, dashboard displays)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for UC3843D8TR. Our core advantages include:

• 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
• In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
• HK-SZ Synergy, Flexible Settlement: Direct global shipping from Shenzhen with support for HK bank transfers and multi-currency.
• Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
• BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.

Quality Assurance & Compliance

Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.

• 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
• RoHS Compliant: All electronic components comply with international environmental and safety standards.
• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

UC3843D8TR 是德州儀器（Texas Instruments）推出的一款高性能電流模式 PWM 控制器，專為離線式和 DC-DC 轉換器應用設計。採用 8-SOIC 封裝，為電源設計提供緊湊的解決方案。器件工作電源電壓範圍為 7.6V 至 30V，開關頻率高達 500kHz。欠壓鎖定（UVLO）閾值為 8.4V（啟動）和 7.6V（停止），確保可靠的啟動和關斷。UC3843D8TR 包含一個微調振盪器以實現精確的頻率控制、一個溫度補償參考電壓和一個高增益誤差放大器。其電流模式架構提供固有的逐脈衝電流限制和改善的瞬態響應。

詳細技術參數

核心特性

• 電流模式操作，改善瞬態響應並簡化環路補償
• 微調振盪器，頻率控制精確
• 帶滯回的欠壓鎖定
• 高增益誤差放大器
• 逐脈衝電流限制
• 低啟動電流（典型值 0.5 mA）
• 推挽輸出級，提供高峰值電流驅動

典型應用場景

• 消費電子產品的 AC-DC 適配器和充電器
• 電信和網絡設備的 DC-DC 轉換器（例如 5G 基站電源）
• 工業自動化系統的電源
• LED 照明驅動器
• 汽車電源系統（例如信息娛樂系統、儀表盤顯示）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 UC3843D8TR 提供全面的供應鏈與批發解決方案。 我們的核心優勢包括：

• 全天候環球客戶支援：專業團隊為您提供即時報價及技術支援，無需漫長等待。
• 現貨庫存，即日發貨：確保現貨充足。下午 4 點前確認訂單，即可安排當天寄出。
• 深港聯動，結算靈活：深圳直發全球，物流高效可靠；支援香港銀行戶口轉賬及多幣種結算。
• Escrow 擔保交易：支援 Escrow.com 平台交易，保障買賣雙方權益，小批量訂單亦可安心在線下單。
• BOM 配單與樣板服務：提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。

品質保證與合規

Jasin Chip 承諾所有出貨產品均為原廠正貨，具備完善的品質保證及產品可追溯性。

• 100% 原廠正貨：承諾所有供應零件均為原裝現貨，品質嚴格把關，來源清晰可追溯。
• 符合 RoHS 認證：所有電子元器件均符合國際環保標準及相關安全認證。
• 原廠封裝保護：嚴格保留原廠原始包裝及封條，確保物流過程中的靜電防護 (ESD) 與物理安全。

以上產品均為原廠正貨，提供 BOM 配單及現貨庫存支援，歡迎查詢。

HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]