UC3843AN TI PWM Controller | 8-PDIP | 8.4V-30V Input, 275kHz Max Frequency

Product Overview

The UC3843AN from Texas Instruments is a high-performance fixed-frequency current-mode PWM controller designed for off-line and DC-to-DC converter applications. It features low startup current (<1mA), trimmed oscillator discharge current for precise duty cycle control, and a totem-pole output stage optimized for driving power MOSFETs. Housed in an 8-pin PDIP package, it operates over a wide supply voltage range (8.4V to 30V) and delivers up to 1A peak gate drive current.

Detailed Technical Specifications

Key Features

• Current-mode operation with automatic feedforward compensation
• Low startup current (<1 mA) for efficient power-up
• Trimmed oscillator discharge current for precise duty cycle control
• Totem-pole output stage with high peak current (1A)
• Under-voltage lockout (UVLO) with hysteresis (8.4V/7.6V)
• Internal 5V reference with ±2% accuracy
• Wide operating frequency range up to 275 kHz

Target Applications

• Off-line AC-DC power supplies for 5G base stations (e.g., rectifier modules)
• DC-DC converters for automotive dashboard displays and infotainment systems
• Battery chargers for industrial handheld devices
• Telecom power modules (e.g., -48V to 5V converters)
• LED lighting drivers for commercial and residential use

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for UC3843AN. 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

UC3843AN 是德州儀器（TI）推出的一款高性能固定頻率電流模式 PWM 控制器，專為離線式和 DC-DC 轉換器應用設計。它具有低啟動電流（<1mA）、精確的振盪器放電電流以實現精準的佔空比控制，以及優化用於驅動功率 MOSFET 的推挽輸出級。採用 8 引腳 PDIP 封裝，工作電壓範圍寬（8.4V 至 30V），可提供高達 1A 的峰值柵極驅動電流。

詳細技術參數

核心特性

• 電流模式操作，具有自動前饋補償
• 低啟動電流（<1 mA），實現高效啟動
• 精確的振盪器放電電流，實現精準佔空比控制
• 推挽輸出級，峰值電流高達 1A
• 欠壓鎖定（UVLO）帶滯回（8.4V/7.6V）
• 內部 5V 參考電壓，精度 ±2%
• 工作頻率範圍寬，最高 275 kHz

典型應用場景

• 5G 基站離線式 AC-DC 電源（例如整流模塊）
• 汽車儀表盤顯示和娛樂系統的 DC-DC 轉換器
• 工業手持設備的電池充電器
• 電信電源模塊（例如 -48V 轉 5V 轉換器）
• 商業和住宅 LED 照明驅動器

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 UC3843AN 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]