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| 型号： | SG5841JSY |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC CTLR PWM HI INTEGRATED 8-SOIC |
| 产品变化通告： | Product Discontinuation 14/Mar/2011 |
| 标准包装： | 2,500 |
| 输出隔离： | 隔离 |
| 频率范围： | 62kHz ~ 68kHz |
| 输入电压： | 11 V ~ 24.7 V |
| 输出电压： | 18V |
| 工作温度： | -20°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | * |
| 包装： | 带卷 (TR) |
Pin Configuration
GND
FB
VIN
RI
GATE
VDD
SENSE
RT
Figure 4. Pin Configuration
Pin Definitions
Pin #
1
Name
GND
Function
Ground
Ground.
Description
The signal from the external compensation circuit is fed into this pin. The PWM
2
FB
Feedback
duty cycle is determined in response to the signal from this pin and the current-
sense signal from pin 6. If FB voltage exceeds the threshold, the internal
protection circuit disables PWM output after a predetermined delay time.
For startup, this pin is pulled HIGH to the rectified line input via a resistor. Since
3
VIN
Startup Input the startup current requirement is very small, a large startup resistance is used to
minimize power loss.
4
RI
Reference
Setting
A resistor connected from the RI to GND provides a constant current source. This
determines the center PWM frequency. Increasing the resistance reduces PWM
frequency. Using a 26K ? resistor results in a 65KHz center PWM frequency.
For over-temperature protection. An external NTC thermistor is connected from
5
RT
Temperature this pin to the GND pin. The impedance of the NTC decreases at high
Detection temperatures. Once the voltage of the RT pin drops below a fixed limit, PWM
output is disabled.
6
7
8
SENSE
VDD
GATE
Current
Sense
Power
Supply
Driver Output
Current sense. The sensed voltage is used for peak-current-mode control and
cycle-by-cycle current limiting.
Power supply. If V DD exceeds a threshold, the internal protection circuit disables
PWM output.
The totem-pole output driver for the power MOSFET, which is internally clamped
below 18V.
? 2006 Fairchild Semiconductor Corporation
SG5841J ? Rev. 1.3.5
4
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SG5841JSZ | 功能描述:IC PWM FLYBACK ISOLATED CM 8-SOP RoHS:是 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:- 标准包装:3,000 系列:- 输出隔离:隔离 频率范围:61kHz ~ 71kHz 输入电压:9.4 V ~ 28 V 输出电压:12V 功率（瓦特）:- 工作温度:-40°C ~ 125°C 封装/外壳:SC-74，SOT-457 供应商设备封装:6-TSOP 包装:带卷 (TR) |
| SG5841SY | 功能描述:电压模式 PWM 控制器 HI-INTEGRD GRN-MODE PWM CONTROL W/JITTER RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SG5841SZ | 功能描述:IC PWM FLYBACK ISOLATED CM 8-SOP RoHS:是 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:- 标准包装:3,000 系列:- 输出隔离:隔离 频率范围:61kHz ~ 71kHz 输入电压:9.4 V ~ 28 V 输出电压:12V 功率（瓦特）:- 工作温度:-40°C ~ 125°C 封装/外壳:SC-74，SOT-457 供应商设备封装:6-TSOP 包装:带卷 (TR) |
| SG5841SZ_SB82167 | 功能描述:电流型 PWM 控制器 HI-INTEGRD GRN-MODE PWM CONTROLLER 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 |
| SG5842A | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
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