TOP264VG datasheet(13/40 Pages) POWERINT

13 / 40 page

Rev. E 08/12

TOP264-271

www.powerint.com

Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins

PI-4717-120307

Input

Voltage

CONTROL

4 M

Ω

VUV = IUV × RLS + VV (IV = IUV)

VOV = IOV × RLS + VV (IV = IOV)

For RLS = 4 MΩ

VUV = 102.8 VDC

VOV = 451 VDC

DCMAX@100 VDC = 76%

DCMAX@375 VDC = 41%

PI-4719-120307

Input

Voltage

Sense Output Voltage

VUV = IUV × RLS + VV (IV = IUV)

VOV = IOV × RLS + VV (IV = IOV)

For RLS = 4 MΩ

VUV = 102.8 VDC

VOV = 451 VDC

DCMAX @ 100 VDC = 76%

DCMAX @ 375 VDC = 41%

CONTROL

RLS

4 M

Ω

OVP >3kΩ

VROVP

ROVP

Figure 14. Line-Sensing for Undervoltage, Overvoltage and Line Feed-Forward.

Figure 15. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and

Hysteretic Output Overvoltage Protection.

Figure 13. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL

CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to

SOURCE or CONTROL Pin.)

Input

Voltage

D C

S D

CONTROL

V X C S

PI-6119-061011

E Package

(eSIP-7C)

V Package (eDIP-12)

1 V

2 X

3 C

4 F

6 D

S 12

S 11

S 10

S 9

S 8

S 7

K Package (eSOP-12)

S 12

S 11

S 10

S 9

S 8

S 7

1 V

2 X

3 C

4 F

6 D

PI-4720-120307

Input

Voltage

VUV = RLS × IUV + VV (IV = IUV)

For Values Shown

VUV = 103.8 VDC

RLS

6.2 V

4 M

Ω

40 k

Ω

CONTROL

PI-4721-120307

Input

Voltage

CONTROL

4 M

Ω

55 k

Ω

RLS

1N4148

VOV = IOV × RLS + VV (IV = IOV)

For Values Shown

VOV = 457.2 VDC

Figure 16. Line-Sensing for Undervoltage Only (Overvoltage Disabled).

Figure 17. Line-Sensing for Overvoltage Only (Undervoltage Disabled). Maximum

Duty Cycle Reduced at Low-Line and Further Reduction with

Increasing Line Voltage.

Figure 18. External Set Current Limit.

PI-5580-111210

Input

Voltage

RIL

For RIL = 12 kΩ

ILIMIT = 61%

See Figure 37 for other

resistor values (RIL).

For RIL = 19 kΩ

ILIMIT = 37%

CONTROL

TOP264VG Datasheet(PDF) 13 Page - Power Integrations, Inc.

TOP264VG Datasheet(HTML) 13 Page - Power Integrations, Inc.

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