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4-Channel Transistor Output Photocouplers That Contribute to High Density Mounting of Insulated Low and Medium-Speed Communication Interfaces

Product News 2022-03

The package photograph of 4-channel transistor output photocouplers that contribute to high density mounting of insulated low- and medium-speed communication interfaces : TLP294-4, TLP295-4

Toshiba Electronic Devices & Storage Corporation ("Toshiba") has launched 4-channel transistor output photocouplers (hereafter called transistor couplers) “TLP294-4” and “TLP295-4,” which have standardized the input threshold voltage of the LEDs and use the SO16 package.

TLP294-4 is an AC input type and TLP295-4 is a DC input type. They feature shorter propagation delay time than Toshiba’s current transistor couplers[1] by incorporating a discharging resistor for base stored charge of the transistor. The existing transistor couplers have been used for applications in which communication speed is up to around 10 kbps, but the new products support 10 to 20 kbps, making them suitable for FA equipment such as programmable logic controllers and inverters, and insulated communication interface applications. As 4-channel products, they allow high density mounting.

In terms of insulation performance, they feature a minimum creepage distance of 5 mm and a minimum isolation voltage of 3.75 kVrms, and they have been certified to international safety standards such as UL1577 and EN 60747-5-5. So, they are also suitable for applications requiring high insulation performance.

Notes :
[1] Current products TLP292-4 and TLP293-4

Applications

  • Programmable logic controllers
  • I/O interface
  • AC servo

Features

  • Current transfer ratio : IC/IF=100 % (min)
  • High/Low level input threshold voltage :
    VITH=1 V (min)
    VITL=5 V (max)
  • Short propagation delay time:
    tpHL=50 μs (max)
    tpLH=100 μs (max)

Main Specifications

(Unless otherwise specified, Ta=25 °C)

Part number

TLP294-4

TLP295-4

Input type

AC

DC

Package

Type

SO16

Size  typ.  (mm)

10.3 × 7.0 × 2.1

Absolute

maximum

ratings

Operating temperature

  Topr  (°C)

-55 to 125

Isolation voltage

BVS

(Vrms)

3750

Coupled

electrical

characteristics

High-level input

threshold voltage  VITH

min  (V)

1

Low-level input

threshold voltage  VITL

max  (V)

5

Current transfer ratio  IC/IF   (%)

100 to 700

Switching

characteristics

Propagation delay time (H/L)  tpHL

max  (μs)

50

Propagation delay time (L/H)  tpLH.

max  (μs)

100

Pin Assignments

The illustration of pin assignment of 4-channel transistor output photocouplers that contribute to high density mounting of insulated low- and medium-speed communication interfaces : TLP294-4
The illustration of pin assignment of 4-channel transistor output photocouplers that contribute to high density mounting of insulated low- and medium-speed communication interfaces : TLP295-4

Application Circuit Example

The illustration of application circuit example of 4-channel transistor output photocouplers that contribute to high density mounting of insulated low- and medium-speed communication interfaces : TLP294-4, TLP295-4

Note :
The application circuits shown in this document are provided for reference purposes only.
Thorough evaluation is required, especially at the mass-production design stage.
Providing these application circuit examples does not grant any license for industrial property rights.

Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.