TNY289KG Ver la hoja de datos (PDF) - Power Integrations, Inc

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Fabricante

TNY289KG

Energy-Effcient, Off-Line Switcher With Line Compensated Overload Power

Power Integrations, Inc 

TNY284-290

BYPASS/

MULTI-FUNCTION

(BP/M)

115 μA

25 μA

LINE UNDER-VOLTAGE

FAULT

PRESENT

AUTO-

RESTART

COUNTER

6.4 V

RESET

ENABLE

1.0 V + VT

ENABLE/

UNDER-

VOLTAGE

(EN/UV)

1.0 V

JITTER

CLOCK

DCMAX

OSCILLATOR

OVP

LATCH

REGULATOR

5.85 V

BYPASS PIN

+ UNDER-VOLTAGE

BYPASS

CAPACITOR

SELECT AND

CURRENT

5.85 V

4.9 V

-

VILIMIT

LIMIT STATE

MACHINE

LINE

COMPENSATION

CURRENT LIMIT

COMPARATOR

DRAIN

(D)

THERMAL

SHUTDOWN

S

Q

R

Q

LEADING

EDGE

BLANKING

Figure 3. Functional Block Diagram.

Pin Functional Description

DRAIN (D) Pin:

This pin is the power MOSFET drain connection. It provides

internal operating current for both start-up and steady-state

operation.

BYPASS/MULTI-FUNCTION (BP/M) Pin:

This pin has multiple functions:

• It is the connection point for an external bypass capacitor for

the internally generated 5.85 V supply.

• It is a mode selector for the current limit value, depending on

the value of the capacitance added. Use of a 0.1 μF capaci-

tor results in the standard current limit value. Use of a 1 μF

capacitor results in the current limit being reduced to that of

the next smaller device size. Use of a 10 μF capacitor results

in the current limit being increased to that of the next larger

device size for TNY285-290.

• It provides a shutdown function. When the current into the

bypass pin exceeds ISD, the device latches off until the BP/M

voltage drops below 4.9 V, during a power-down or, when the

UV function is employed with external resistors connected to

the BP/UV pin, by taking the UV/EN pin current below IUV

minus the reset hysteresis (Typ. 18.75 μA). This can be used

SOURCE

(S)

PI-6639-113011

D Package (SO-8C)

EN/UV 1

8S

BP/M 2

7S

6S

D4

5 S P Package (DIP-8C)

EN/UV 1

8S

Exposed Pad (On Bottom)

Internally Connected to

SOURCE Pin

K Package

(eSOP-12B)

EN/UV 1

BP/M 2

N/C 3

N/C 4

D6

BP/M 2

D4

12 S

11 S

10 S

9S

8S

7S

7S

6S

5S

PI-6577-053112

Figure 4. Pin Configuration.

2

Rev. A 09/12

www.powerint.com

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