5秒后页面跳转
DI-123 PDF预览

DI-123

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 382K
描述
9.65 W, Dual Output Power Supply for Residential Heating Control

DI-123 数据手册

 浏览型号DI-123的Datasheet PDF文件第2页 
Design Idea DI-123  
TinySwitch®-III  
9.65 W, Dual Output Power Supply for Residential  
Heating Control  
Application  
Device Power Output Input Voltage  
Output Voltage  
Topology  
Residential Heating Control TNY275P  
9.65 W  
185-265 VAC 5V / 0.25 A, 24 V / 0.35 A Flyback  
Design Highlights  
MOSFETisturnedoff. ThentheenergystoredinT1transfers  
to the secondary where it is rectified and filtered by D1 and  
C2 and D4 and C5. The primary side RCD clamp (D8, C4  
R1 and R8) limits the peak DRAIN voltage spike caused by  
transformer leakage inductance.  
Simple, low cost design only requires 38 parts  
<150 mW no-load consumption at 230 VAC input  
Meets CEC / ENERGY STAR active-mode efficiency  
and no-load input power requirements  
Both outputs exhibit good cross regulation  
Meets CISPR-22 Class B/EN55022 B without input  
X or Y capacitors or an input common mode choke  
Power Integrations E-Shield™ transformer construction  
techniques, the RCD clamp, a snubber (R11 and C14), a  
simple π filter (C7, C8, L1 and L5) and the frequency jitter  
function of the TinySwitch-III family, provide good EMI  
margin, even with the output return connected to safety earth  
ground (see Figure 3).  
Operation  
The flyback converter shown in Figure 1 uses a TNY275  
(U1) to provide two output voltages: 5 V at 250 mA and  
24 V at 350 mA. Typical applications are residential heating  
controllers (furnace) or any application where 2 outputs are  
required. The 9.65 W of output power is delivered by using  
the increased current limit of U1, which is selected by the  
value of C11.  
Key Design Points  
The turns ratio of the two secondary winding was  
optimized for output voltage centering.  
The use of a fast instead of an ultrafast diode for  
D8 improves efficiency by recovering some leakage  
inductance energy.  
The MOSFET integrated within U1 switches the primary of  
transformer T1. Each time it turns on, the primary current  
ramps until it reaches an internal current limit and the  
R10  
C13  
470 pF  
10  
1/2 W  
C4  
L2  
330 µH  
L4  
FB  
1 nF  
24 V, 350 mA  
T1  
1 kV  
1
3
10  
6
C12  
47 µF  
35 V  
C2  
220 µF  
35 V  
D1 UF4003  
D4 1N5819  
R8  
75 kΩ  
L3  
FB  
5 V, 250 mA  
RTN  
D2  
D3  
R1  
C6  
C5  
1N4937  
1N4007  
100 Ω  
100 µF  
330 µF  
16 V  
L
8, 9  
10 V  
D8  
EF20  
FR106  
F1  
1 A  
C7  
10 µF  
400 V  
C8  
10 µF  
400 V  
TinySwitch-III  
185-265  
VAC  
R2  
U1  
TNY275P  
47 Ω  
D
S
R3  
15 kΩ  
1%  
R9  
261 kΩ  
1%  
EN/UV  
BP/M  
R11  
100 Ω  
N
R4  
U2  
1 kΩ  
PC817A  
C10  
100 nF  
R12  
30 Ω  
R5  
3.3 kΩ  
D5  
1N4937  
D7  
1N4007  
C14  
33 pF  
1 kV  
C15  
0.1 µF  
50 V  
C11  
10 µF  
50 V  
U3  
LM431  
2%  
R6  
10 kΩ  
1%  
L3, L4 and L5 are  
3.5 mm × 10 mm  
Ferrite beads.  
L5  
FB  
PI-4495-090706  
Figure 1. TinySwitch-III 9.65 W Residential Heating Controller Power Supply.  
September 2006  
DI-123  

与DI-123相关器件

型号 品牌 描述 获取价格 数据表
DI-124 POWERINT Ultra-wide Input Range (57-580 VAC) Flyback Power Supply

获取价格

DI-128 POWERINT 35 W (75 W Peak) Variable-speed DC Motor Drive

获取价格

DI-129 POWERINT 33 W (60 W Peak) PVR Power Supply

获取价格

DI-13 POWERINT 3 W Universal Adapter

获取价格

DI-130 POWERINT Passive PFC LED Lighting Supply

获取价格

DI13001N DIOTEC Small Signal Bipolar Transistor,

获取价格