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參數(shù)資料
| 型號： | ML4818 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Phase Modulation/Soft Switching Controller |
| 中文描述： | 相位調(diào)制/軟開關(guān)控制器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 92K |
| 代理商： | ML4818 |
ML4818
PRODUCT SPECIFICATION
10
REV. 1.0.3 6/21/01
Thermal Information
The ML4818 is offered in a Power DIP package. This pack-
age features improved thermal conduction through the lead-
frame. Much of the heat is conducted through the center 4
grounded leads. Thermal dissipation can be improved with
this package by using copper area on the board to function as
a heat sink. Increasing this area can reduce the
θ
(see fig-
ures 14 and 15), increasing the power handling capability of
the package. Additional improvement may be obtained by
using an external heat sink (available from Staver).
Applications
The application circuit shown in Figure 16 features the
ML4818 in a primary-side controlled voltage mode
application with voltage feed-forward. Input voltage is
rectified 120VAC (nominal). Feed-forward is provided by
the RAMP pin via the resistor connected to the high voltage
input. Current is sensed through sense transformer T4.
Figure 14. PC Board Copper Area Used as a Heat Sink
Figure 15.
θ
JA
as a Function of I (see figure 15)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
0.555"
I
I
I
I
50
30
20
0
2
I : HEAT SINK DIMENSION (INCHES)
40
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4818CP | 功能描述:軟開關(guān) PWM 控制器 PFC Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| ML4818CP | 制造商:Fairchild Semiconductor Corporation 功能描述:CONTROLLER IC ROHS COMPLIANT:NO |
| ML4818CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Phase Modulation/Soft Switching Controller |
| ML4819 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Power Factor and PWM Controller Combo |
| ML4819CP | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 PFC 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(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 |
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