参数资料
| 型号： | SG6741SZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/7页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM GREEN OVP HV 8SOP |
| 产品变化通告： | Mold Compound Change 12/Dec/2007 |
| 标准包装： | 2,500 |
| 输出隔离： | 隔离 |
| 频率范围： | 62kHz ~ 68kHz |
| 输入电压： | 9.5 V ~ 30 V |
| 输出电压： | 18V |
| 功率（瓦特）： | 400mW |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 带卷 (TR) |
June 2011
SG6741
Highly Integrated Green-Mode PWM Controller
Features
High-Voltage Startup
Low Operating Current: 4mA
Description
The highly integrated SG6741 PWM controller provides
several features to enhance the performance of flyback
converters.
Linearly Decreasing PWM Frequency to 22kHz
The
highly
integrated
SG6741
series
of
PWM
Frequency Hopping to Reduce EMI Emission
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking
Synchronized Slope Compensation
Gate Output Maximum Voltage Clamp: 18V
V DD Over-Voltage Protection (Auto Restart)
V DD Under-Voltage Lockout (UVLO)
Internal Open-Loop Protection
Constant Power Limit (Full AC Input Range)
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Power Adapters
Open-Frame SMPS
controllers provides several features to enhance the
performance of flyback converters.
To minimize standby power consumption, a proprietary
green-mode function provides off-time modulation to
linearly decrease the switching frequency at light-load
conditions. To avoid acoustic-noise problems, the
minimum PWM frequency is set above 22KHz. This
green-mode function enables the power supply to meet
international power conservation requirements. With the
internal high-voltage startup circuitry, the power loss
due to bleeding resistors is also eliminated. To further
reduce power consumption, SG6741 is manufactured
using the BiCMOS process, which allows an operating
current of only 4mA.
SG6741 integrates a frequency-hopping function that
helps reduce EMI emission of a power supply with
minimum line filters. Its built-in synchronized slope
compensation achieves stable peak-current-mode
control. The proprietary internal line compensation
ensures constant output power limit over a wide range
of AC input voltages, from 90V AC to 264V AC .
SG6741 provides many protection functions. In addition
to cycle-by-cycle current limiting, the internal open-loop
protection circuit ensures safety when an open-loop or
output short-circuit failure occurs. PWM output is
disabled until V DD drops below the UVLO lower limit;
then the controller starts again. As long as V DD exceeds
about 26V, the internal OVP circuit is triggered.
SG6741 is available in an 8-pin SOP package.
Ordering Information
Operating
Part Number
Temperature
Package
Packing Method
Range
SG6741SZ
SG6741SY
-40 to +105°C
-40 to +105°C
8-Lead Small Outline Package (SOP)
8-Lead Small Outline Package (SOP)
Tape & Reel
Tape & Reel
? 2008 Fairchild Semiconductor Corporation
SG6741 ? Rev. 1.3.4
1
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| SG6742HLSY | IC CTRLR PWM PROG GREEN CM 8SOP |
| SG6742MLSY | IC CTRLR PWM GREEN CM OVP 8SOP |
| SG6841DZ3 | IC REG CTRLR FLYBACK PWM 8-DIP |
| SG6842JLSZ | IC CTLR PWM HI INTEGRATED 8-SOIC |
| SG6846ALSY | IC CTRLR PWM PROG GREEN OVP 8SOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SG6742 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
| SG6742DZ | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
| SG6742HL | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
| SG6742HL/HR | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
| SG6742HLSY | 功能描述:电流型 PWM 控制器 Current Mode PWM Controller 18V RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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