UC3842J TI Current Mode PWM Controller | 16V/1A, 500kHz

Product Overview

The UC3842J is a high-performance current mode PWM controller from Texas Instruments, designed for off-line and DC-to-DC converter applications. It features low startup current, trimmed oscillator discharge current, and a precision reference for accurate control. The device operates at a fixed frequency up to 500 kHz and provides essential protection features including under-voltage lockout (UVLO) with hysteresis and a high-current totem-pole output for driving power MOSFETs.

Detailed Technical Specifications

Key Features

• Current mode operation for improved transient response and simplified loop compensation
• Low startup current (typical 0.5 mA)
• Trimmed oscillator discharge current for precise frequency control
• High-current totem-pole output (1A peak) suitable for driving capacitive loads
• Under-voltage lockout with hysteresis (16V on, 10V off)
• 5V precision reference with ±2% tolerance
• Internal soft-start capability
• Wide operating frequency range up to 500 kHz

Target Applications

• AC-DC power supplies for 5G base stations
• DC-DC converters for automotive dashboard systems
• Industrial power modules for motor drives
• Battery chargers for electric vehicles
• LED lighting drivers
• Telecom power supplies

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for UC3842J. 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

UC3842J 是德州儀器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。它具有低啟動電流、精確的振盪器放電電流以及精準參考電壓，可實現精確控制。該器件工作頻率高達 500 kHz，並提供關鍵保護功能，包括帶滯後的欠壓鎖定 (UVLO) 以及用於驅動功率 MOSFET 的高電流推挽輸出。

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迴路補償
• 低啟動電流 (典型值 0.5 mA)
• 精確的振盪器放電電流，實現精準頻率控制
• 高電流推挽輸出 (1A 峰值)，適合驅動電容性負載
• 帶滯後的欠壓鎖定 (16V 開啟，10V 關閉)
• 5V 精準參考電壓，容差 ±2%
• 內部軟啟動功能
• 寬工作頻率範圍，最高 500 kHz

典型應用場景

• 5G 基站用 AC-DC 電源
• 汽車儀表板系統用 DC-DC 轉換器
• 工業電機驅動用電源模塊
• 電動汽車電池充電器
• LED 照明驅動器
• 電信電源

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 UC3842J 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]