4-Channel Transistor Output Photocouplers That Contribute to High Density Mounting of Insulated Low and Medium-Speed Communication Interfaces
Product News 2022-03
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 |
|||
|---|---|---|---|
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
Application Circuit Example
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.