CXAC85185是一款高性能的离线PWM控制器，适用于低功耗AC/DC充电器和适配器应用。它在一次侧调节中运行。因此，可以消除光耦合器和诸如CXPU3357D之类的电压基准集成电路。专利恒压（CV）和恒流（CC）控制集成。在CC控制中，电流和输出功率的设置可以通过CS引脚上的感应电阻Rs进行外部调节。在CV控制中，利用多模运算来实现高性能和高效率。此外，通过内置的线损补偿，实现了良好的负载调节。CXAC85185提供开机软启动控制和保护，具有自动恢复功能，包括逐周期电流限制、VCC紫外线、OTP、SCP。采用频率混叠技术可获得良好的电磁干扰性能
高精度恒压（CV）和恒流（CC）输出。一次侧调节，无二次电压基准和光耦。
可编程CV和CC调节。
内置自适应峰值电流调节
可编程线损补偿
·开机软启动。
·DCM操作中的反激拓扑
内置前缘冲裁（LEB）
·逐周限流
·VCC欠压锁定（UVLO）。
短路保护。
·超温保护。
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[ CXAC85185 ]
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7.相关产品
产品概述 返回TOP
CXAC85185 is a high performance offline PWM controller for low power AC/DC charger and adaptor applications. It operates in primary-side regulation. Consequently, opto-coupler and voltage reference IC such as CXPU3357D could be eliminated. Proprietary Constant Voltage (CV) and Constant Current(CC) control are integrated. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in wireloss compensation. CXAC85185 offers power-on soft-start control and protection coverage with auto-recovery features including Cycle-by Cycle current limiting, VCC UVLO,OTP, SCP. Excellent EMI performance is achieved with frequency shuffling technique. CXAC85185 is available in SOT23-6 packages.
产品特点 返回TOP
High precision constant voltage(CV) and constant current (CC) output. Primary-Side- Regulation without secondary voltage reference and Opto-coupler.
Programmable CV and CC Regulation.
Built- in Adaptive Peak Current Regulation
Programmable wireloss Compensation
Power-on Soft-Start.
Flyback Topology in DCM Operation
Built-in Leading Edge Blanking(LEB)
Cycle-by-Cycle Current Limiting
VCC under voltage lockout (UVLO).
Short Circuit Protection.
Over Temperature Protection.
Available in SOT23-6 Packages.
RoHS Compliant and 100% Lead (Pb)-Free
应用范围 返回TOP
Cell Phone Charger
Small Power Adaptor
Lower Power LED drivers
Linear Regulator/RCC Replacement.
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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AC/DC PWM Controller |
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Product |
Status |
Device Description |
VIN(min~max) |
VOUT |
IOUT |
IQ(typ) |
Vfb |
Frequency |
Pkg |
|
Active |
1.9A固定频率白光驱动 |
2.5~5V |
3-27v |
1.9A |
170uA |
0.3V |
1.2MHZ |
SOT23-6 |
|
|
NRFED |
1A白光驱动 |
2.7~4.5V |
ADJ |
2.5A |
100uA |
0.1V |
1MHZ |
SOT23-6 |
|
|
NRFED |
450uA |
60KHZ |
420mA |
TO92 |
|||||
|
NRFED |
700uA |
40KHZ |
420mA |
SOT23-6 SOP8 |
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