TOP259YN-TL datasheet(18/50 Pages) POWERINT

18 / 50 page

Rev. M 12/21

TOP252-262

www.power.com

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

PI-4727-061207

Input

Voltage

CONTROL

S C

PI-4728-120307

Input

Voltage

VUV = IUV × RLS + VM (IM = IUV)

VOV = IOV × RLS + VM (IM = 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

Figure 29. Three Terminal Operation (MULTI-FUNCTION Features Disabled).

Figure 30. Line Sensing for Undervoltage, Overvoltage and Line Feed-Forward.

Figure 28. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and

Latched Output Overvoltage Protection with Device Reset.

PI-4756-121007

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

10 k

Ω

Reset

Typical Uses of MULTI-FUNCTION (M) Pin

ON/OFF

16 k

Ω

PI-4725-011008

Input

Voltage

CONTROL

RIL

RLS

4 M

Ω

VUV = IUV × RLS + VV (IV = IUV)

VOV = IOV × RLS + VV (IV = IoV)

DCMAX@100 VDC = 76%

DCMAX@375 VDC = 41%

12 k

Ω

For RIL =

ILIMIT = 61%

QR can be an optocoupler

output or can be replaced

by a manual switch.

TOP259-261YN would

use the G pin as the

return for Q

Input

Voltage

CONTROL

RIL

RLS

12 k

Ω

4 M

Ω

VUV = IUV x RLS + VV (IV = IUV)

VOV = IOV x RLS + VV (IV = IoV)

For RLS = 4 MΩ

DCMAX @ 100 VDC = 76%

DCMAX @ 375 VDC = 41%

For RIL = 12 kΩ

ILIMIT = 61%

See Figure 55b for

other resistor values

(RIL) to select different

ILIMIT values.

VUV = 102.8 VDC

VOV = 451 VDC

TOP259-261YN would

use the G pin as the

return for R

IL.

Figure 26. Active-on Remote ON/OFF with Line-Sense and External

Current Limit.

Figure 27. Line Sensing and Externally Set Current Limit.

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