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参数资料
| 型号： | EFS21-T5 |
| 英文描述： | IC-POWER SWITCH |
| 中文描述： | 集成电路电源开关 |
| 文件页数： | 10/13页 |
| 文件大小： | 235K |
| 代理商： | EFS21-T5 |
Striking pulse
1/ THE AC POWER SWITCH: FUNCTIONAL DESCRIPTION
The Starter is a bi-directional switch which performs two functions:
the preheat of the tube,
the ignition of the tube.
During the preheat period, the ASD
is fully
conducting. The tube lamp is short circuited by the
starter, and the current flows through its filaments. In
these conditions, the tube can not light up, but the
temperature of the tube electrodes increases.
At the end of the preheat period, the lamp filaments are
warm enough to emit electrons in the gas and to permit
the lamp ignition in good conditions. The ASD switches
off the preheating current . At this moment, the ballast is
equivalent to a current generator (I=ISO, ISO = Switched
Off current). As the ASD switches off, the starter voltage
increases. The amplitude of this high voltage spike is
clamped by the ASD (VBR≈1350 V). As the starter and
the tube are in parallel, the striking pulse is directly
applied to the tube. The electromagnetic energy of the
ballast is then discharged through the tube and the
ASD.
2/ WHAT’S NEW IN THIS SWITCH?
The AC SWITCH merges an auxiliary power supply for
the driver, a power clamping device (1350V) and a
bi-directional switch with his execution pilot block.
EFS STARLIGHT-KIT APPLICATION NOTE
3
2
1
FLUORESCENT
TUBE
220V / 50HZ
BALLAST
V strike
The mains voltage is applied
Preheating of the tube
Striking of the tube
PREHEAT
GND
Vcc
G2
TUBE
G1
Power supply
ON / OFF
DRIVER
NEW EFS ASD
AC
SWITCH
HIGH
VOL
T
AGE
CLAMPING
EFS
6/13
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相关代理商/技术参数 |
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|---|---|
| EFS21TL5 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:STARLIGHT-KIT |
| EFS21-TL5 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:STARLIGHT-KIT |
| EFS-22D | 制造商:TDK CORPORATION OF AMERICA 功能描述:Surface Potential Sensors |
| EFS250 | 功能描述:保险丝 250AMP 415V AC INDUS RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485 |
| EFS2A | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:STARLIGHT-KIT |
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