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參數資料
| 型號： | FAN7532MX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Ballast Control IC |
| 中文描述： | 0.5 A FLUORESCENT LIGHT CONTROLLER, 52 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, SOP-16 |
| 文件頁數： | 11/16頁 |
| 文件大小： | 214K |
| 代理商： | FAN7532MX |
FAN7532
11
2) Open Lamp Protection (OLP) Mode
After the lamp has successfully ignited, the FAN7532 enters
run mode. In this mode, if one of the cathodes isn’t correctly
connected to the ballast, the ballast should stop operation for
safety until the lamp is changed and a new one is connected
between the lamp and the ballast. As soon as the voltage of
OLP pin exceeds 2V, the IC enters the protection mode
instantly. However, the FAN7532 outputs are only disabled
in this mode. To exit protection mode, the lamp must be
replaced or correctly connected to the ballast.
PCB Layout Guides
Component selection and placement on the PCB is very
important when using power control ICs. Bypass the V
cc
to
GND as close to the IC terminals as possible with a low
ESR/ESL capacitor, as shown in Figure 17. This bypassed
capacitor can reduce the noise from the power supply parts
such as a startup resistor and a charge pump. The GND lead
should be directly connected to the low side power MOSFET
using an individual PCB trace. In addition, the ground return
path of the timing components (CPH, CT, RPH, RT) and V
cc
decoupling capacitor should be connected directly to the IC
GND lead and not via separate traces or jumpers to other
ground traces on the board. These connection techniques
prevent high current ground loops from interfering with sen-
sitive timing component operations and allow the entire con-
trol circuit to reduce common-mode noise due to output
switching.
V
CPH
5V
2.9V
FREQ
f
PH
f
OSC
V
LAMP
V
UVLO+
V
UVLO-
15.6V
OLP
Open lamp
Run
Open
Lamp
Reset when open lamp
Only gate driver
is disabled
Preheating
Ignition
Preheating
Ignition Run
Reset when open lamp
Open lamp
Only gate driver
is disabled
Open
Lamp
Run
Figure 16. Timing Diagram (OLP Mode)
Figure 17. PCB Layout
相關PDF資料 |
PDF描述 |
|---|---|
| FAN7544 | Simple Ballast Controller |
| FAN7544M | Simple Ballast Controller |
| FAN7544MX | Simple Ballast Controller |
| FAN7544N | Terminal Block; RoHS Compliant:Yes RoHS Compliant: Yes |
| FAN7548 | Dual LCD Back Light Inverter Drive IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN7535 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:PFC & Ballast Control IC |
| FAN7535M | 功能描述:功率因數校正 IC Half-bridge Gate RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| FAN7535MX | 功能描述:開關變換器、穩壓器與控制器 Electronic Ballast PFC Combo IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN7544 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Simple Ballast Controller |
| FAN7544M | 功能描述:開關變換器、穩壓器與控制器 Electronic Ballast Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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