- 您现在的位置：买卖IC网 > PDF目录15226 > SG5842JASZ (Fairchild Semiconductor)IC REG CTRLR FLYBK ISO PWM 8-SOP PDF资料下载
参数资料
| 型号： | SG5842JASZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO PWM 8-SOP |
| 产品变化通告： | Mold Compound Change 12/Dec/2007 |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 68kHz |
| 占空比： | 70% |
| 电源电压： | 10.5 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
Pin Configuration
Figure 4. Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
GND
FB
VIN
RI
RT
SENSE
VDD
GATE
Description
Ground
The signal from the external compensation circuit is fed into this pin. The PWM 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 the startup
current requirement is very small, a large startup resistance can be used to minimize power loss.
A resistor connected from the RI pin 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 this pin to the
GND pin. The impedance of the NTC decreases at high temperatures. Once the voltage of the
RT pin drops below a fixed limit, PWM output is latched off.
Current sense. The sensed voltage is used for peak-current-mode control and cycle-by-cycle
current limiting.
Power supply. The internal protection circuit disables PWM output if V DD is over-voltage.
The totem-pole output driver for the power MOSFET, which is internally clamped below 18V.
? 2007 Fairchild Semiconductor Corporation
SG5842A/SG582JA ? Rev. 1.4.3
4
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| VI-BTL-EV-F4 | CONVERTER MOD DC/DC 28V 150W |
| TL494BDR2G | IC REG CTRLR PWM VM 16-SOIC |
| VI-BTL-EV-F3 | CONVERTER MOD DC/DC 28V 150W |
| NCP305LSQ36T1G | IC VOLT DETECT OD 3.6V SC-82AB |
| VI-BTL-EV-F2 | CONVERTER MOD DC/DC 28V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SG5842JDSY | 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 |
| SG5842JDSZ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG5843SZ | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| SG5851 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low-Cost Green-Mode PWM Controller for Flyback Converters |
| SG5851A | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low-Cost, Green-Mode, PWM Controller for Flyback Converters |
发布紧急采购，3分钟左右您将得到回复。