CXAC85246是一款高性能的一次侧调节（PSR）控制器，具有高精度的CV/CC控制，非常适合充电器应用。如果SEL引脚对地短路，该集成电路还可以支持LED照明的准谐振（QR）Buck恒流拓扑。在CV模式下，cxac85246a采用了AM（调幅）模式和FM（调频）模式相结合的多模式控制，提高了系统的效率和可靠性。在CC模式下，集成电路使用带线路和负载CC补偿的PFM控制。该集成电路可以实现无噪声工作和优化的动态响应。内置的电缆跌落补偿（CDC）功能可以提供优异的CV性能。CXAC85246集成了欠压闭锁（UVLO）、VDD过压保护（VDD OVP）、逐周限流（OCP）、短负载保护（SLP）、门箝位和VDD箝位等功能和保护。
多模PSR控制
PSR的音频无噪声操作
PSR的优化动态响应
低待机功率<70mW
±4%CC和CV调节
PSR-CV模式下的可编程电缆跌落补偿（CDC）内置交流线路和负载CC补偿
内置保护：短负载保护（SLP）片上热关机（OTP）逐周限流前沿消隐（LEB）引脚浮动保护VDD UVLO、OVP和钳位
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[ CXAC85246 ]
目录
7.相关产品
产品概述 返回TOP
CXAC85246 is a high performance Primary Side Regulation (PSR)controller with high precision CV/CC control ideal for charger applications. The IC can also support Quasi-Resonant (QR) Buck constant current topology for LED lighting if SEL pin is short to GND. In CV mode, CXAC85246adopts Multi Mode Control which uses the hybrid of AM (Amplitude Modulation) mode and (Frequency Modulation) FM mode to improve system efficiency and reliability. In CC mode, the IC uses PFM control with line and load CC compensation. The IC can achieve audio noise free operation and optimized dynamic response. The built-in Cable Drop Compensation (CDC) function can provide excellent CV performance. CXAC85246 integrates functions and protections of Under Voltage Lockout (UVLO), VDD over Voltage Protection (VDD OVP), Cycle-by-cycle Current Limiting (OCP), Short Load Protection (SLP), Gate Clamping, and VDD Clamping.
产品特点 返回TOP
Multi-Mode PSR Control
Audio Noise Free Operation for PSR
Optimized Dynamic Response for PSR
Low Standby Power<70mW
±4% CC and CV Regulation
Programmable Cable Drop Compensation (CDC) in PSR CV Mode Built-in AC Line & Load CC Compensation
Build in Protections: Short Load Protection (SLP) On-Chip Thermal Shutdown (OTP) Cycle-by-Cycle Current Limiting Leading Edge Blanking (LEB) Pin Floating Protection VDD UVLO, OVP & Clamp
SOT23-6 package
应用范围 返回TOP
Battery Chargers for Cellular Phones
AC/DC Power Adapter
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产品封装图 返回TOP
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电路原理图 返回TOP
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| 原边调节器 | ||||||||
| 产品型号 | 功率(W) | 拓扑 | 导通电阻 | 恒压恒流精度 | 最大工作频率 | 线补偿 | 待机功率 | 封装 |
| ( Ω ) | (KHz) | (mW) | ||||||
| CXAC85245A | ≤12 | Flyback | 3.6 | ±5% | 70 | Y | <75 | SOP8 |
| CXAC85245B | ≤15 | Flyback | 2.1 | ±5% | 70 | Y | <75 | SOP8 |
| CXAC85246 | Up to 24W | Flyback | - | ±5% | 70 | Y | <75 | SOT23-6 |
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