TOP243 View Datasheet(PDF) - Power Integrations, Inc

Part Name

Description

Manufacturer

TOP243

Extended power, design elexible, integrated off-line switcher

Power Integrations, Inc 

TOP242-250

Function

TOPSwitch-II TOPSwitch-GX Figures TOPSwitch-GX Advantages

Remote ON/OFF

N/A*

Single transistor

or optocoupler

interface or manual

switch

11, 22, • Fast on/off (cycle by cycle)

23, 24, • Active-on or active-off control

25, 26, • Low consumption in remote off state

27, 29, • Active-on control for fail-safe

36, 37, • Eliminates expensive in-line on/off

38, 39, switch

40

• Allows processor controlled turn

on/off

• Permits shutdown/wake-up of

peripherals via LAN or parallel port

Synchronization

Thermal Shutdown

N/A*

125 °C min.

Latched

Single transistor

• Synchronization to external lower

or optocoupler

frequency signal

interface

• Starts new switching cycle on

General Informatiodenman&d Table of Contents

Hysteretic 130 °C

• Automatic recovery from thermal

min. Shutdown (with

fault

75 °C hysteresis)

Pro•dLaurgce thySsteerelseis cpretvoenrtsGcircuuiitde 1

board overheating

Current Limit Tolerance ±10% (@25 °C) ±7% (@25 °C)

-8% (0 °C to100 °C) -4% (0 °C to 100 °C)

Data Sheets 2 • 10% higher power capability due to

tighter tolerance

DRAIN

DIP 0.037" / 0.94 mm

Creepage

SMD 0.037" / 0.94 mm

at Package TO-220 0.046" / 1.17 mm

DRAIN Creepage at 0.045" / 1.14 mm

PCB for Y, R and F

(R and F

Packages

Package N/A*)

0.137" / 3.48 mm

0.137" / 3.48 mm

0.068" / 1.73 mm

0.113" / 2.87 mm

(preformed leads)

• Greater immunity to arcing as a

resAultpofpbulilidc-uap otfidousnt, dNeboristaends 3

other contaminants

• Preformed leads accommodate

large creepaDgeefosr PiCgBnlayIoduteas 4

• Easier to meet Safety (UL/VDE)

Table 4 (cont). Comparison Between TOPSwitch-II and TOPSwitch-GX. *Not available

Design Tools 5

TOPSwitch-FX vs. TOPSwitch-GX

Table 5 compares the features and performance differences

between TOPSwitch-GX and TOPSwitch-FX. Many of the new

features eliminate the need for additional discrete components.

Quality and Reliability 6

Other features increase the robustness of design allowing cost

savings in the traPnsfaormcekr aandgoteher Ipnowfeor cormmponaenttis.on 7

Function

TOPSwitch-FX

TOPSwitDchP-GAX-SwitTcOhPSDwCitc-hD-GCX ASdvaenmtagiens ar 8

Light Load Operation Cycle skipping

Frequency and Duty Cycle • Improves light load efficiency

LinkSwirtecduhctio&n TinySwitc•hR-eIdIucAesCno--lDoadCconSsuemmptioinnar 9

Line Sensing/Externally Line sensing and Line sensing and externally • Additional design flexibility allows all

Set Current Limit

externally set

(Y, R and F Packages) current limit

set current limit possible

features to be used simultaneously

simultanTeoOuslPy Switch-GX AC-DC Seminar 10

mutually

(functions split onto

Current Limit

exclusive (M pin) L and X pins)

100-40% Sale1s00-R30%epresentativ• eMsinimaiznesdtranDsfiosrmterr icboreustizoe rs 11

Programming

in highly continuous designs

Range

Table 5. Comparison Between TOPSwitch-FX and TOPSwitch-GX. (continued on next page)

28 H

9/02

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