- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄67757 > LNK574DG (POWER INTEGRATIONS INC) SPECIALTY ANALOG CIRCUIT, PDSO8 PDF資料下載
參數(shù)資料
| 型號(hào)： | LNK574DG |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類(lèi)： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012, SOP-8 |
| 文件頁(yè)數(shù)： | 13/16頁(yè) |
| 文件大?。?/td> | 1515K |
| 代理商： | LNK574DG |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)當(dāng)前第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
Rev. B 12/07/10
6
LNK574
www.powerint.com
Thermal Considerations
The copper area underneath the LinkZero-LP (U1) acts not only
as a single point ground, but also as a heatsink. As it is
connected to the quiet source node, this area should be
maximized for good heat sinking of U1. The same applies to
the cathode of the output diode.
Y Capacitor
The placement of the Y-type capacitor (if used) should be
directly from the primary input filter capacitor positive terminal to
the common/return terminal of the transformer secondary.
Such a placement will route high magnitude common-mode
surge currents away from U1. Note: If an input π EMI filter is
used, the inductor in the π filter should be placed between the
negative terminals on the input filter capacitors.
Output Diode (D
O)
For best performance, the area of the loop connecting the
secondary winding, the output diode (D
O) and the output filter
capacitor (C
O)should be minimized. In addition, sufficient
copper area should be provided at the anode and cathode
terminals of the diode for heat sinking. A larger area is preferred
at the electrically “quiet” cathode terminal. A large anode area
can increase high frequency conducted and radiated EMI.
Resistor R
S and CS represent the secondary side RC snubber.
Quick Design Checklist
As with any power supply design, all LinkZero-LP designs
should be verified on the bench to make sure that component
specifications are not exceeded under worst-case conditions.
Figure 5.
PCB Layout of a 2.1 W, 6 V, 350 mA Charger.
+
–
HV DC
IN
+
–
LV DC
OUT
Transformer
CB
RFB1
T1
J3
R6
CO
DO
U1
CFB
RFB2
DBP
RBP
CBP
DB
RS
CS
PI-6098-092410
The following minimum set of tests is strongly recommended:
1. Maximum drain voltage – Verify that V
DS does not exceed
660 V at the highest input voltage and peak (overload) output
power. This margin to the 700 V BV
DSS specification gives
margin for design variation, especially in clampless designs.
2. Maximum drain current – At maximum ambient temperature,
maximum input voltage and peak output (overload) power,
verify drain current waveforms for any signs of transformer
saturation and excessive leading-edge current spikes at
startup. Repeat under steady state conditions and verify that
the leading-edge current spike event is below I
LIMIT(MIN) at the
end of the t
LEB(MIN). Under all conditions, the maximum drain
current should be below the specified absolute maximum
ratings.
3. Thermal check – At specified maximum output power,
minimum input voltage and maximum ambient temperature,
verify that the temperature specifications are not exceeded
for LinkZero-LP, transformer, output diode and output
capacitors. Enough thermal margin should be allowed for
part-to-part variation of the R
DS(ON) of LinkZero-LP as speci-
fied in the data sheet. Under low line and maximum power,
maximum LinkZero-LP source pin temperature of 100 °C is
recommended to allow for these variations.
4. Negative drain voltages – clampless designs may allow the
drain voltage to ring below source and cause reverse
currents to flow from source to drain. Verify that any such
current remains within the envelope shown in Figure 9.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LPY403ALTR | SPECIALTY ANALOG CIRCUIT, PBGA28 |
| LPY403AL | SPECIALTY ANALOG CIRCUIT, PBGA28 |
| LPY450ALTR | SPECIALTY ANALOG CIRCUIT, PBCC28 |
| LPY450AL | SPECIALTY ANALOG CIRCUIT, PBCC28 |
| LSN2-T/16-D12NGC | DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LNK574DG-TL | 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 NL, Int OL Switcher 3W 85-265\230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| LNK576DG | 功能描述:Converter Offline Flyback Topology 100kHz 8-SO 制造商:power integrations 系列:LinkZero??-LP 包裝:管件 零件狀態(tài):有效 輸出隔離:隔離 內(nèi)部開(kāi)關(guān):是 電壓 - 擊穿:700V 拓?fù)?回掃 電壓 - 啟動(dòng):- 電壓 - 電源（Vcc/Vdd）:- 占空比:63% 頻率 - 開(kāi)關(guān):100kHz 功率（W）:9W 故障保護(hù):限流，開(kāi)環(huán)，超溫，過(guò)壓，短路 控制特性:- 工作溫度:-40°C ~ 150°C（TJ） 封裝/外殼:8-SOIC（0.154"，3.90mm 寬）7 引線 供應(yīng)商器件封裝:8-SO 安裝類(lèi)型:表面貼裝 標(biāo)準(zhǔn)包裝:100 |
| LNK584 | 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:Zero Standby Consumption Integrated Off-Line Switcher |
| LNK584DG | 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 Zero Stdby OL-Swtchr 3W/85-265V 3W/230V RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| LNK584DG-TL | 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 Zero Stdby OL-Swtchr 3W/85-265V 3W/230V RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。