TNY266GN-TL datasheet(2/22 Pages) POWERINT

Part #	TNY266GN-TL

Description	Enhanced, Energy Effi cient, Low Power Off-line Switcher

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Manufacturer	POWERINT [Power Integrations, Inc.]

Direct Link	http://www.powerint.com

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2 / 22 page

Rev. H 02/09

2

TNY263-268

www.powerint.com

Figure 2.

Functional Block Diagram.

Figure 3.

Pin Conﬁguration.

Pin Functional Description

DRAIN (D) Pin:

Power MOSFET drain connection. Provides internal operating

current for both start-up and steady-state operation.

BYPASS (BP) Pin:

Connection point for a 0.1

μF external bypass capacitor for the

internally generated 5.8 V supply.

ENABLE/UNDERVOLTAGE (EN/UV) Pin:

This pin has dual functions: enable input and line undervoltage

sense. During normal operation, switching of the power

MOSFET is controlled by this pin. MOSFET switching is

terminated when a current greater than 240

μA is drawn from

this pin. This pin also senses line undervoltage conditions

through an external resistor connected to the DC line voltage.

If there is no external resistor connected to this pin,

TinySwitch-II detects its absence and disables the line

undervoltage function.

SOURCE (S) Pin:

Control circuit common, internally connected to output

MOSFET source.

SOURCE (HV RTN) Pin:

Output MOSFET source connection for high voltage return.

PI-2643-030701

CLOCK

OSCILLATOR

5.8 V

4.8 V

SOURCE

(S)

S

R

Q

DCMAX

BYPASS

(BP)

+

-

VI

LIMIT

FAULT

PRESENT

CURRENT LIMIT

COMPARATOR

ENABLE

LEADING

EDGE

BLANKING

THERMAL

SHUTDOWN

+

-

DRAIN

(D)

REGULATOR

5.8 V

BYPASS PIN

UNDER-VOLTAGE

1.0 V + VT

ENABLE/

UNDER-

VOLTAGE

(EN/UV)

Q

240 A50 A

LINE UNDER-VOLTAGE

RESET

AUTO-

RESTART

COUNTER

JITTER

1.0 V

6.3 V

CURRENT

LIMIT STATE

MACHINE

PI-2685-101600

EN/UV

D

S

S (HV RTN)

BP

P Package (DIP-8B)

G Package (SMD-8B)

8

5

7

1

4

2

3

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