5秒后页面跳转
DI-18 PDF预览

DI-18

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT /
页数 文件大小 规格书
2页 49K
描述
Low Cost 2.75 W CV/CC Charger or Adapter

DI-18 数据手册

 浏览型号DI-18的Datasheet PDF文件第2页 
®
Design Idea DI-18  
Lin k S w it c hLow Cost 2.75 W  
CV/CC Charger or Adapter  
Topology  
Flyback  
Device  
Power Output  
Input Voltage  
Output Voltage  
Application  
Charger/Adapter  
2.75 W  
85-265 VAC  
LNK501  
5.5 V  
LinkSwitchderivesallfeedbackinformationfromtheprimary.  
During output diode conduction, the output voltage  
transformed through the turns ratio is sampled and held by  
C4. The feedback voltage across C4 (VOR) is converted into  
feedbackcurrentbyR1andfedintotheCONTROLpin. This  
feedbackcurrentregulatestheoutputbyPWMcontrolduring  
CV operation, and by reducing the internal current limit  
during CC operation. Below an output voltage of ~2 V  
LinkSwitchentersauto-restart,limitingaverageoutputcurrent  
to <50 mA. The nominal transition from CV to CC occurs at  
5.5 V, 0.5 A. The output envelope characteristic and  
specification limits are shown in Figure 2.  
Design Highlights  
• Replaces a linear transformer based supply at the same or  
lower cost but with much higher performance  
• <0.3Wconsumptionatzeroloadmeetsworldwideguidelines  
(EC’s 0.3 W, USA’s 1 W for example)  
• Extremely simple circuit – only 17 components (14 with  
integrated bridge) for production-worthy design  
• Primary based CV/CC output – no secondary sense  
components required  
±10% output voltage and ±20% output current tolerances at  
peak power point  
• Fullyprotectedforthermal,shortcircuitandopenloopfaults  
• >70% efficiency  
Together with D5, C4 and R1 are also part of the primary  
clamp, limiting the peak drain to source voltage due to  
leakage inductance. Resistor R2 filters the leading edge  
leakage inductance spike, reducing the error in the feedback  
voltage. The CONTROL pin capacitor C3 provides energy  
storage for supply startup and sets auto-restart timing during  
fault conditions.  
• Meets CISPR22B/EN55022B and FCC B EMI limits  
• Meets 2.5 kV EN61000-4-5 differential surge  
• Ultra-low leakage current design <5 µA  
• EE13 core for low cost and small size  
Operation  
The AC input is rectified and filtered by D1-D4, C1 and C2.  
Conducted EMI filtering is provided both by a π filter (C1, L1  
and C2) and a differential filter (RF1 and C1). Together with  
ashieldinthetransformer(formedfrompartoftheprimary)the  
designmeetsconductedEMIlimitswithnoY-capacitorbetween  
primary and secondary. Resistor RF1 also functions as a fuse.  
Key Design Points  
• Select transformer turns ratio to give a VOR of 40-60 V.  
Lower values reduce power capability, higher values  
increase no-load consumption.  
• R1 provides 2.3 mA into the CONTROL pin at the  
peak power point at 85 VAC. The value can be  
adjusted to center the output voltage.  
L1  
1 mH  
D1, D2, D3, D4  
1N4005 X 4  
Lin k S w it c h  
T1  
D
S
5.5 V, 0.5 A  
5
1
4
C3  
0.22 µF  
50 V  
U1  
15 T  
C
C5  
470 µF  
10 V  
104 T  
34 AWG  
LNK501  
30 AWG  
T.I.W.  
6
RF1  
10 1 W  
Fusible  
RTN  
12 T  
C4  
R1  
20.5 kΩ  
1%  
D6  
11DQ06  
1A, 60 V  
2 x 30 AWG  
3
0.1 µF  
100 V  
C1  
C2  
EE13  
LP=2.55 mH  
4.7 µF  
400 V  
4.7 µF  
400 V  
85 - 265 VAC  
D5  
1N4937  
R2  
100 Ω  
PI-3364-091602  
Figure 1. LinkSwitch 2.75 W Charger Power Supply: 85 VAC to 265 VAC Input, 5.5 V, 0.5 A Output  
September 2002  
DI-18  
www.powerint.com  

与DI-18相关器件

型号 品牌 描述 获取价格 数据表
DI-19 POWERINT Low Cost 1.5 W CV/CC Charger or Adapter

获取价格

DI-20 POWERINT 145 W PC Main ATX Supply

获取价格

DI200 PANJIT DUAL-IN-LINE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIER

获取价格

DI200S PANJIT DUAL-IN-LINE GLASS PASSIVATED SINGLE-PHASE SURFACE MOUNT BRIDGE RECTIFIER

获取价格

DI200S CTC GLASS PASSIVATED BRIDGE RECTIFIERS

获取价格

DI200S_15 CTC GLASS PASSIVATED BRIDGE RECTIFIERS

获取价格