典型方案	IC型号	封装	功率管	架构	平均效率	静态功耗	EMI	备注
5V1A	FT839NB1	SOP8	内置NPN	隔离PSR+肖特基	76.5%(6级)	<75mW(6级)	PASS	无Y电容
5V2A非	FT839ND1	SOP8	内置NPN	隔离PSR+肖特基	79.0%(5级)	<75mW(6级)	NO	非/小变压器EE13
5V2A	FT8783ND1+FT8370A	SOP7+SOP8	内置NPN	隔离PSR+同步整流	84.0%(6级)	<75mW(6级)	PASS
5V2A非	FT8393ND1	SOP7	内置NPN	隔离PSR+肖特基	81.0%(6级)	<75mW(6级)	NO	非/小变压器EE13
5V2.4A	FT8393ND1+FT8370B	SOP7+SOP8	内置NPN+内置MOS	隔离PSR+同步整流	85.6%(6级)	<75mW(6级)	PASS
5V2.4A非	FT8393ND1	SOP7	内置NPN	隔离PSR+肖特基	83.0%(6级)	<75mW(6级)	NO	非/小变压器EE15
5V3A	FT8393MD1+FT8370C	SOP8+SOP8	内置MOS+内置MOS	隔离PSR+同步整流	85.0%(6级)	<75mW(6级)	PASS
5V3.1A	FT8393M+FT8370C	SOT23-5+SOP8	外推MOS+内置MOS	隔离PSR+同步整流	86.0%(6级)	<75mW(6级)	PASS
5V3.4A	FT8393MDD1+FT8370C	DIP7+SOP8	内置MOS+内置MOS	隔离PSR+同步整流	85.6%(6级)	<75mW(6级)	PASS

产品简介 :

The FT839NX/FT839MX controller device is optimized for high-performance, low power switching mode power supply applications. The FT839NX/FT839MX facilitates CC/CV charger design by eliminating an opto-coupler and TL431. Its highly integrated functions such as Under Voltage Lockout (UVLO), Leading Edge Blanking (LEB) and built-in cable compensation offer the users a high efficiency and low cost solution for AC/DC power applications.  

Power supplies built with FT839NX/FT839MX can achieve both highest average efficiency， fast dynamic load response and super low standby power. FT839NX and FT839MX satisfy DoE Level 6 requirements with production margin from 5V/1A to 5V/2.4A applications, respectively.

Furthermore, FT839NX/FT839MX features fruitful protections like Open Circuit Protection and Over Temperature Protection to eliminate the external protection circuits and provide reliable operations. FT839NX is available in SOP8/DIP8 package. FT839MX is available in SOP8 package.

产品特点 :

Constant-Current (CC) and Constant-Voltage (CV) with Primary Side Control

Proprietary technology enabling high efficiency and fast dynamic response

Satisfy DoE Level 6 requirements from 5V/1A to 5V/2.4A applications

No audible noise over entire operating range

Optimization for capacitive loading

Built-in power NPN/MOS

Built-in Cable Compensation

Built-in Line Compensation

Primary-side feedback eliminates opto-coupler and TL431

Cycle-by-Cycle Current Limiting

Over Temperature Protection

VCC Over Voltage Protection

CV Open-loop Protection

Excellent capacitive loading start-up performance

5V1A充电器方案特色概述：

全电压输入范围：90Vac~264Vac  50/60Hz

符合EMI 测试标准;EN55022 Class B标准

Efficiency ≥ 76% @115Vac/230Vac

待机功耗<60mw @230V

效率和待机功耗，满足DoE/CoC Tier2六级能效标准并有一定余量

CC/CV恒流< ± 5%

输出纹波  Vripple_p-p<100mv @90V-264V

内置输出线电压补偿

具有输出短路保护、欠压锁定、过压保护功能

的容性负载输出启动特性

内置功率开关管，SOP8封装，外围元件数量很少，成本低。

电路原理：

效率/纹波/OCP

I-V曲线

关键器件温度

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