TNY264GN-TL datasheet(2/24 Pages) POWERINT

Part #	TNY264GN-TL

Description	Enhanced, Energy Efficient, 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 / 24 page

2 G4/05

TNY263-268

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/UNDER-VOLTAGE (EN/UV) Pin:

This pin has dual functions: enable input and line under-voltage

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 under-voltage 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 under-

voltage 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)

+

-

VILIMIT

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

µA

50

µA

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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TNY264GN-TL Datasheet(PDF) 2 Page - Power Integrations, Inc.

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