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參數(shù)資料
| 型號(hào)： | KA7540D |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Simple Dimming Ballast Control IC |
| 中文描述： | 簡(jiǎn)單的調(diào)光鎮(zhèn)流器控制IC |
| 文件頁(yè)數(shù)： | 8/14頁(yè) |
| 文件大?。?/td> | 104K |
| 代理商： | KA7540D |
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KA7540
8
No Lamp Protection
When the voltage at pin #4 is lower than 2V, the gate drive output is off-state, so the external power MOSFETs stop
switching. In no lamp protection circuit the dc link voltage is divided by a couple of resistors including both lamp filaments,
and the divided voltage is applied to the pin #4 before the MOSFETs start switching.
In normal mode, the average voltage of the V3 is the half of the dc link voltage (Vdd, PFC_OUT). So, in order to make the
start condition stable, the resistors are designed to make the voltage of V3 be the half of the dc link voltage.
Figure 4. Lamp detection resistor network
When 2 Lamp
VR4
Vdd
2
R14
-------------+
+
R19
+
+
--------------------------------------------------------------------------------------
×
=
400
2
180k
--------------------+
680k
15k
+
+
----------------------------------------------------------------------------------------
×
≡
V3
V2
+
R15
R18
----------------------------
200V
≡
×
=
VR4
2V
>
When 1 Lamp
VR4
Vdd
R18
R14
R15
2Rf
R19
+
+
+
+
--------------------------------------------------------------------------------
×
=
400
180k
330k
680k
15k
+
+
+
----------------------------------------------------------------------------------------
×
≡
VR4
When No Lamp
VR4
2V
>
0V <2V
)
Stop switching
=
DC Link Voltage (Vdd), PFC_OUT
R14
R15
Rfilament
R18
V3
C13
R19
V2
Rfilament
Rfilament
Rfilament
To pin #4
R16
R17
VR4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KA7541 | Simple Ballast Controller |
| KA7541D | Simple Ballast Controller |
| KA75420Z | Voltage Detector |
| KA75290M | Voltage Detector |
| KA75290Z | Voltage Detector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KA7540DTF | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| KA7541 | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Ballast Controller Electronic 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| KA7541D | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Ballast Controller Electronic 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| KA7541DTF | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Ballast Controller Electronic 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| KA75420 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Voltage Detector |
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