TOP243 View Datasheet(PDF) - Power Integrations, Inc
Part Name
Description
MFG CO.
'TOP243' PDF : 52 Pages View PDF
TOP242-250
In addition to using a minimum number of components,
sequence when it detects the first closure of the switch, and
TOPSwitch-GX provides many technical advantages in this type
subsequent bouncing of the switch has no effect. If necessary,
of application:
the microprocessor could implement the switch debouncing
in software during turn-off, or a filter capacitor can be used
1. Extremely low power consumption in the off mode: 80 mW
at the switch status input.
typical at 110 VAC and 160 mW typical at 230 VAC. This
is because in the remote/off mode the TOPSwitch-GX 4. No external current limiting circuitry is needed for the
consumes very little power, and the external circuitry does
operation of the U4 optocoupler output due to internal
not consume any current (either M, L or X pin is open) from
limiting of M pin current.
the high voltage DC input.
5. No high voltage resistors to the input DC voltage rail are
2. A very low cost, low voltage/current, momentary contact
required to power the external circuitry in the primary. Even
switch can be used.
the LED current for U3 can be derived from the CONTROL
pin. This not only saves components and simplifies layout,
3. No debouncing circuitry for the momentary switch is required.
but also eliminates the power loss associated with the high
During turn-on, the start-up time of the power supply
voltage resistors in both on and off states.
(typically 10 to 20 ms) plus the General microprocessor initiation Information & Table of Contents
time act as a debouncing filter, allowing a turn-on only if the 6. Robust design: There is no on/off latch that can be accidentally
switch is depressed firmly for at least the above delay time.
During turn-off, the microprocessor initiates the shutdown
triggered by transients. Instead, the power supply is held in
the on-stPatertohroduguh tchetsecSonedalrey scidetomicrroGprocuesisdor.e 1
Data Sheets 2
Application Notes 3
Design Ideas 4
Design Tools 5
Quality and Reliability 6
Package Information 7
DPA-Switch DC-DC Seminar 8
LinkSwitch & TinySwitch-II AC-DC Seminar 9
TOPSwitch-GX AC-DC Seminar 10
Sales Representatives and Distributors 11
26 H
9/02
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