Datasheet > DI-129

DI-129

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	669K
描述
33 W (60 W Peak) PVR Power Supply

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DI-129 数据手册

Design Idea DI-129

PeakSwitch^

33 W (60 W Peak) PVR Power Supply

Application

Device

Power Output

Input Voltage

Output Voltage

Topology

PVR

PKS606P

33 W (60 W Pk)

195-265 VAC

3.3 V, 5 V, 17.5 V, 22 V

Flyback

Design Highlights

theirset-pointthresholds,U2pullsadditionalcurrentthrough

the LED in U5. This in turn increases the base drive to

Q1, increasing the current pulled out of the EN/UV pin of

U6. Switching cycles are skipped once the EN/UV disable

threshold current is exceeded. When the current out of the

EN/UV pin falls below the disable threshold, switching

cycles are re-enabled.

•

Small, low-cost EF25 core size delivers 60 W peak

Low component count: only 47 parts

High efﬁciency: ≥76% at 33 W

No-load power consumption <140 mW

Meets EN55022 B conducted EMI limits

Operation

A bias winding (T1, pins 4 and 5) on the transformer is

rectiﬁed and ﬁltered by D15 and C21, and supplies operating

current to U6, through R14. The frequency jitter function

within U6 and a Y-type capacitor (C10) across T1 reduce the

generation of conducted EMI so that a single common mode

choke (L5) and a small X-capacitor (C13) allow the supply

meet EN55022B limits with 6 dBµV or more of margin. A

combination RCD-Zener clamp (R2, R15 C9, D10 andVR2)

limits the peak drain-node voltage to below the 700 V rating

of the MOSFET integrated within U6.

The ﬂyback converter shown in Figure 1 uses a member of

the PeakSwitch family (U6, a PKS606P) to supply 33 W

continuously and peak power pulses of up to 60 W.

The controller in U6 receives feedback from the secondary

through U5, and based on that feedback, enables or disables

theswitchingofitsintegratedMOSFETtomaintainregulation.

A portion of both the 3.3 V and the 5 V outputs are fed into

the TL431 (U2), which controls the current through the LED

in U5. As the 3.3 V or the 5 V output voltages rise above

C10

2.2 nF

1 kV

VR2

1N4764A

100 V

+22 V

360 mA

C15

220 µF

35 V

C14

150 µF

35 V

STPS3150

2.2 nF

+17.5 V

670 mA

R15

1 kV

10 kΩ

STPS3150

C16

2200 µF

16 V

220 µF

10 V

1N4007

1/2 W

3.3 µH

+5 V

1.6 A

22 Ω

1/2 W

C13

100 nF

275 VAC

SB530

C17

2200 µF

16 V

220 µF

10 V

3.3 µH

2 A

D15

1N4148

+3.3 V

1.74 A

C20

D10

FR106

33 µF

400 V

SB520

C21

47 µF

19 mH

35 V

RTN

R13

15 Ω

1 W

VR1

1N4733A

5.1 V

RV1

275 VAC

R14

EF25

C18

100 µF

50 V

4.7 kΩ

-5 V

28 mA

PeakSwitch

R11

3.92 kΩ

U5B

PC817D

R12

56.2 kΩ

PKS606P

D13

EN/UV

1N4148

R10

C22

150 Ω

100 nF

50 V

Q1 2N3904

C11

100 nF

50 V

R17

22 Ω

1N4007

C12

220 nF

50 V

3.3 kΩ

U5A

PC817D

R16

1 kΩ

D16

1N4148

10 µF

50 V

LM431A

10 kΩ

PI-4522-110906

Figure 1. Circuit Diagram of a 33 W Continuous, 60 W Peak, PVR Power Supply.

November 2006

DI-129

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