Datasheet > TOP222YNTL

TOP222YNTL

更新时间： 2022-05-14 22:08:35

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		/
页数	文件大小	规格书
20页	1537K
描述
Three-Terminal Off-Line PWM Switch

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数据手册

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TOP222YNTL 数据手册

TOP221-227

ꢑ1

ꢆ.ꢆ µꢒ

ꢉꢃ

ꢊꢋꢄꢅ01

ꢑꢒ ꢓ

ꢄTꢏ

ꢌꢃ

ꢌꢆ

ꢑ

ꢆꢆ0 µꢋ

100 µꢋ

Rꢆ

ꢅꢇ ꢈΩ

ꢌ1

ꢃ.ꢃ ꢍꢋ

1 ꢈꢎ

ꢎR1

10 ꢎ

ꢉ1

ꢊꢋꢅ00ꢄ

Rꢃ

100 Ω

ꢉꢆ

1ꢓꢅ1ꢅ8

10 Ω

ꢀꢁꢂꢃ-ꢄꢅꢆꢇꢃ

ꢈꢉ ꢊꢆꢋꢌꢍ

ꢏ1

ꢑ

TOPꢎꢔꢁꢍꢕꢖ-ꢊꢊ

ꢊ1

ꢌꢅ

100 µꢋ

16 ꢎ

ꢈ

ꢏꢐꢀꢃꢃ1ꢀ

ꢉOꢏTꢄOꢐ

ꢉ

ꢊꢃ

ꢀꢌ81ꢇꢔ

12 ꢓ ꢏꢗꢆ-ꢊꢘꢗꢙꢅꢍꢃꢂ

ꢌꢄ

ꢅꢇ µꢋ

10 ꢎ

ꢎ

ꢀꢁꢂꢃ11ꢄꢂ0ꢅ0ꢅ01

Figure 7. Schematic Diagram of a 4 W TOPSwitch-II Standby Power Supply using an 8 lead PDIP.

Application Examples

the full universal AC input range. The TOP221 is packaged in

an 8 pin power DIP package.

Following are just two of the many possible TOPSwitch

implementations. Refer to the Data Book and Design Guide

for additional examples.

The output voltage (5 V) is directly sensed by the Zener

diode (VR1) and the optocoupler (U2). The output voltage is

determined by the sum of the Zener voltage and the volt-

age drop across the LED of the optocoupler (the voltage

drop across R1 is negligible). The output transistor of the

optocoupler drives the CONTROL pin of the TOP221. C5

bypasses the CONTROL pin and provides control loop com-

pensation and sets the auto-restart frequency.

4 W Standby Supply using 8 Lead PDIP

Figure 7 shows a 4 W standby supply. This supply is used

in appliances where certain standby functions (e.g. real time

clock, remote control port) must be kept active even while

the main power supply is turned off.

The 5 V secondary is used to supply the standby function

and the 12 V non-isolated output is used to supply power

for the PWM controller of the main power supply and other

primary side functions.

The transformer’s leakage inductance voltage spikes are

snubbed by R3 and C1 through diode D1. The bias winding

is rectiﬁed and ﬁltered by D3 and C4 providing a non-isolat-

ed 12 V output which is also used to bias the collector of the

optocoupler’s output transistor. The isolated 5 V output wind-

ing is rectiﬁed by D2 and ﬁltered by C2, L1 and C3.

For this application the input rectiﬁers and input ﬁlter are

sized for the main supply and are not shown. The input DC

rail may vary from 100 V to 380 V DC which corresponds to

Rev. G 08/16

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1...3 4 567 8 9...20

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