Datasheet > DI-77

DI-77

更新时间： 2024-11-25 03:29:39

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	414K
描述
3 W Adapter: <200 mW No-Load Consumption

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

DI-77 数据手册

Design Idea DI-77

TinySwitch-II 3 W Adapter:

<200 mW No-Load Consumption

Application

Device

Power Output

Input Voltage

Output Voltage

Topology

Adapter

TNY263P

3 W

85-265 VAC

9 V / 330 mA

Flyback

Design Highlights

(a similarly rated linear transformer adapter will typically

consume approximately 1 W under no-load). This low no-load

consumption is the result of the inherent cycle skipping feature

of the TinySwitch-II and careful transformer design.

•

Replaces a linear transformer based power supply at the

same or lower cost, but with much higher performance

<200 mW no-load consumption (at 115/230 VAC)

Meets CISPR 22-B with >15 dB margin, w/o Y capacitor

Low cost, low component count solution: only 24 parts!

TinySwitch-II On/Off regulation scheme produces ±5%

output regulation over temperature with a 2% Zener

Does not require a transformer bias winding

•

Key Design Points

•

Minimize secondary-side power consumption. Zener diode

VR1 receives its bias current from the opto-LED in U2.

Using a low current device minimizes consumption while

providing an output voltage tolerance of ±5%. A TL431

can be used for tighter output voltage accuracy.

•

Operation

•

Minimize clamp losses: design the transformer to have a low

reﬂected voltage (V_OR). In this case, V_ORwas set to ≈ 90 V.

Minimize leakage inductance: select wire gauge sizes that

completely ﬁll each winding layer of the transformer.

Minimize intra-winding capacitance and no-load

consumption: put a layer of tape between each primary

winding layer.

Use >200 kΩ resistor in the RCD clamp to further reduce

power losses if the following two conditions are met: 1) the

EMIperformanceisnotcompromised,and2)thereisenough

drain voltage (BV_DSS) margin for the internal MOSFET.

ThisTinySwitch-IIbasedﬂybackconverterproducesanisolated

3W, 9VDCoutputfroman85VACto265VACinput. Fusible

resistorRF1givesshortcircuitfaultprotectionandlimitsstartup

inrush current. Inductors L1 and L2 and capacitors C1 and C2

form a low-cost pi (π) ﬁlter that attenuates conducted EMI. In

addition, the internal frequency jitter of the TinySwitch-II, the

use of shield windings, an output RC snubber, and a primary-

side RCD clamp makes the circuit meet CISPR-22 Class B

conducted EMI limits without aYcapacitor, resulting in a very

low value of AC leakage current (<300 µA).

•

The key performance characteristic of this circuit is the

extremely low no-load power consumption of <200 mW

16 Ω

1 µF

50 V

NC NC

200 kΩ

Bead

1/2 W

Bead

9 V, 330 mA

1 nF

1 kV

11DQ06

330 µF

16 V

100 µF

RF1

8.2 Ω

1.0 W

25 V

1N4007 1N4007

EE16

200 Ω

4.7 µF

400 V

Lp = 1.6 mH

1N4007G

RTN

85 - 265

VAC

VR1

BZX79-B8V2

4.7 µF

400 V

TinySwitch-II

TNY263P

PC817A

1N4007

1.0 mH

0.1 µF

50 V

PI-3877-060404

Figure 1. TinySwitch-II 3.0 W Adapter.

May 2004

DI-77

www.powerint.com

中文翻译

下载PDF

与DI-77相关器件

型号	品牌	获取价格	描述	数据表
DI-78	POWERINT	获取价格	Low Cost 1.6 W CV/CC Charger/Adapter
DI78L08ZAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L06ZAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L08DAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L09UAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L09ZAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L10UAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI79L10ZAB	DIOTEC	获取价格	Fixed Positive Standard Regulator,
DI8	TELEDYNE	获取价格	interface relays
DI-80	POWERINT	获取价格	0.6 W Non-Isolated Utility Meter Power Supply

与DI-77相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

40
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

32
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

60
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

56

产品中心

服务支持

精选活动

关于我们

帮助中心

DI-77

DI-77 数据手册

与DI-77相关器件

与DI-77相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

DI-77

DI-77 数据手册

与DI-77相关器件

与DI-77相关文章

您还可以找

您在本页遇到什么问题？