TNY263GG(2016) 查看數據表（PDF） - Power Integrations, Inc

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TNY263GG
(Rev.:2016)

TinySwitch-II Family Enhanced, Energy Efficient, Low Power Off-line Switcher

Power Integrations, Inc 

TNY263-268

BYPASS

(BP)

240 µA

50 µA

LINE UNDERVOLTAGE

AUTO-

RESTART

COUNTER

FAULT

PRESENT

6.3 V

RESET

ENABLE

REGULATOR

5.8 V

DRAIN

(D)

+

CURRENT

LIMIT STATE

MACHINE

-

5.8 V

4.8 V

BYPASS PIN

UNDERVOLTAGE

VILIMIT

CURRENT LIMIT

COMPARATOR

1.0 V + VT

ENABLE/

UNDER-

VOLTAGE

(EN/UV)

1.0 V

JITTER

CLOCK

DCMAX

OSCILLATOR

THERMAL

SHUTDOWN

S

Q

R

Q

LEADING

EDGE

BLANKING

Figure 2. Functional Block Diagram.

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

(S)

PI-2643-031715

P Package (DIP-8B)

G Package (SMD-8B)

BP 1

S2

S3

EN/UV 4

8 S (HV RTN)

7 S (HV RTN)

5D

PI-2685-031715

Figure 3. Pin Configuration.

SOURCE (HV RTN) Pin:

Output MOSFET source connection for high voltage return.

2

Rev. J 08/16

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