VIPER50A

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

Obsolete Product(s) - Obsolete Product(s)

VIPer50/SP - VIPer50A/ASP

7/23

Figure 7: Start-Up Waveforms

Figure 8: Overtemperature Protection

SC10191

T

J

T

tsd

-T

hyst

T

tsc

V

dd

V

ddon

V

ddoff

I

d

V

comp

t

t

t

t

Obsolete Product(s) - Obsolete Product(s)

8/23

VIPer50/SP - VIPer50A/ASP

Figure 9: Oscillator

1

Rt

Ct

OSC

VDD

~360Ω

CLK

FC00050

1 2 3 5 10 20 30 50

30

50

100

200

300

500

1,000

Rt (k

Ω

)

Frequency (kHz)

Oscillator frequency vs Rt and Ct

Ct = 1.5 nF

Ct = 2.7 nF

Ct = 4.7 nF

Ct = 10 nF

FC00030FC00030

For R

t

>1.2KΩ

and

C

t

≥ 15nF if F

SW

≤ 40KHz

F

SW

2.3

R

t

C

t

------------

1

550

R

t

150

–

----------------------

–





⋅

=

C

t

Fsw

40kHz

15nF

22nF

Forbidden area

Forbidden area

Ct(nF) =

Fsw(kHz)

880

Obsolete Product(s) - Obsolete Product(s)

VIPer50/SP - VIPer50A/ASP

9/23

Figure 10: Error Amplifier Frequency Response

Figure 11: Error Amplifier Phase Response

1

0.001 0.01 0.1 1 10 100 1,000

(20)

0

20

40

60

Frequency (kHz)

Voltage Gain (dB)

RCOMP = +∞

RCOMP = 270k

RCOMP = 82k

RCOMP = 27k

RCOMP = 12k

FC00200

0.001 0.01 0.1 1 10 100 1,000

(50)

0

50

100

150

200

Frequency (kHz)

Phase (°)

RCOMP = +

∞

RCOMP = 270k

RCOMP = 82k

RCOMP = 27k

RCOMP = 12k

FC00210

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

VIPER50A

Mfr. #:

Manufacturer:

STMicroelectronics

Description:

AC/DC Converters 700V 1.5A SMPS

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

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