FAN6754A

更新时间： 2024-01-02 11:49:36

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
9页	464K
描述
Design Guideline to Replace SG6742 with FAN6754A

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中文翻译

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技术参数
数据手册

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FAN6754A 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Transferred	零件包装代码：	SOIC
包装说明：	SOP, SOP8,.25	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	风险等级：	5.74
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
湿度敏感等级：	1	端子数量：	8
最高工作温度：	105 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	子类别：	Switching Regulator or Controllers
表面贴装：	YES	最大切换频率：	69 kHz
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

FAN6754A 数据手册

www.fairchildsemi.com

AN-6754A

Design Guideline to Replace SG6742 with FAN6754A

Introduction

FAN6754A is a highly integrated PWM controller featuring

green mode, frequency hopping, constant power limit, and a

number of protection functions. The green-mode function,

burst-mode function, and a low operating current maximize

the light-load efficiency so that the power supply can meet

stringent standby power regulations. Frequency hopping

reduces the Electro-Magnetic Emission (EMI) by spreading

the frequency spectrum. The constant-power-limit function

minimizes the component stress in abnormal conditions and

helps optimize the power stage design. Protection functions

increasing system cost. This application note explains how

to replace PWM controller SG6742 with FAN6754A. These

two devices have the same pin configuration and direct

replacement can be achieved without PCB layout change.

However, functional improvements to the FAN6754A for

higher efficiency and better performance requires several

external components to be changed accordingly. Table 1

summarizes the difference between these two devices. The

pulse-by-pulse current limit threshold voltage is reduced

almost by half to reduce the current sensing loss, which

results in 0.4~0.5% efficiency improvement. The operating

current is also reduced to achieve less than 100mW standby

power consumption for most designs. The typical

application circuit and internal block diagram are shown in

Figure 1 and Figure 2 , respectively.

such as brownout protection, overload

/ open-loop

protection (OLP), over-voltage protection (OVP), sense pin

short-circuit protection (SSCP), and over-temperature

protection (OTP) are fully integrated to improve the

reliability of the switched-mode power supply without

Table 1. Comparison of SG6742 and FAN6754A

SG6742

FAN6754A

Brownout Protection

Line Sensing Using HV Pin

Line Voltage Compensation for Pulse-by-

Saw-Limit (0.9V / 0.56V)

Adjusted by HV Pin (0.46V / 0.39V)

V_SENSE<0.05V Longer than 120µs

Pulse Current Limit (V_Limit-L/ V_Limit-H

)

V_SENSE<0.15V Longer than 150µs

Sense Pin Short-Circuit Protection

Gate Drive Clamping Voltage

18V

5KΩ

2.7mA

150ns

13V

15.5KΩ

1.7mA

FB Impedance (Z_FB

)

Operating Current (I_{DD_OP}

)

Leading-Edge Blanking Time (t_LEB

)

280ns

Soft-Start

5ms

8ms

Maximum Duty Cycle

65%

89%

V_FB-G/V_FB-Nfor Green Mode

V_ZDC/V_ZDCRfor Burst Mode

2.4V / 3.0V

1.6V / 1.7V

2.3V / 2.8V

2.0V / 2.1V

Rev. 1.0.0 • 10/8/10

www.fairchildsemi.com

12 3 4 5 6 7...9

中文翻译

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与FAN6754A相关器件

型号	品牌	获取价格	描述	数据表
FAN6754AMRMY	FAIRCHILD	获取价格	Switching Controller, Current-mode, 69kHz Switching Freq-Max, BICMOS, PDSO8, GREEN, MS-012
FAN6754AMRMY	ONSEMI	获取价格	用于反激转换器的绿色模式 PWM 控制器，65KHz
FAN6754BMRMY	ONSEMI	获取价格	用于反激转换器的绿色模式 PWM 控制器，65KHz
FAN6754MLMY	FAIRCHILD	获取价格	Highly Integrated Green- Mode PWM Controller
FAN6754MRMY	FAIRCHILD	获取价格	Highly Integrated Green- Mode PWM Controller
FAN6754WAMLMY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller Brownout and VLimit Adjustment by HV Pin
FAN6754WAMRMY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller Brownout and VLimit Adjustment by HV Pin
FAN6754WAMRMY	ONSEMI	获取价格	用于反激转换器的绿色模式 PWM 控制器，65KHz，过电压/欠电压保护
FAN6755	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
FAN6755_10	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller

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