TLP421 Toshiba, TLP421 Datasheet - Page 58

• Manufacturer Part Number: TLP421
• Description: PHOTOCOUPLER DC INPUT SSR 4-DIP
• Manufacturer: Toshiba

Specifications of TLP421

• Number Of Channels: 1
• Input Type: DC
• Voltage - Isolation: 5000Vrms
• Current Transfer Ratio (min): 50% @ 5mA
• Current Transfer Ratio (max): 600% @ 5mA
• Voltage - Output: 80V
• Current - Output / Channel: 50mA
• Current - Dc Forward (if): 60mA
• Output Type: Transistor
• Mounting Type: Through Hole
• Package / Case: 4-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Vce Saturation (max): -

9
Toshiba photocouplers use one of four types of LEDs and a projection of the operating life has been made for each LED. The table on
page 57 shows the types of LED used in photocouplers and the figures on pages 58 to 60 show projections of long-term light output
performance and operating life. Note that these operating life data are estimates extrapolated from long-term light output degradation
over a single wafer lot and are shown as reference only.
F50% (cumulative failure rate 50%) operating life: Time period until the projected long-term light output degradation curve of
F0.1% (cumulative failure rate 0.1%) operating life: Time period until the projected long-term light output degradation curve of
The relationship between LED light output degradation and optical coupling characteristics is shown below.
(1) The relationship between LED light output degradation
(2) The relationship between a reciprocal value of LED light output degradation
1
1
2
3
4
and current transfer ratio (CTR)/short circuit current (I
and I
GaAs LED
GaA As ( SH ) LED
GaA As ( DH ) LED
GaA As ( MQW ) LED
Device Degradation
Projected Operating Life Based on LED Light Output Degradation
FT
/I
FLH
/I
FHL
/I
FH
change is 1:1.
F50% operating life
1,300,000 h
1,000,000 h
Ask your local Toshiba sales representative.
540,000 h
Ta = 40°C, I
degradation rate Δ P
Projected Operating Life
the average light output change (X ) shown on pages 58 to 60 reaches the
failure criteria.
X - 3σ shown on pages 58 to 60 reaches the failure criteria.
F
= 20 mA, failure criteria:
CTR (t)
CTR (o)
I
I
FT
FT
SC
(t)
(o)
) is 1:1.
O
F0.1% operating life
< –50%
58
=
=
260,000 h
100,000 h
200,000 h
(
Po (t )
Po (o)
Po ( t)
Po (o)
)
-1
Mainly for phototransistor output devices
and phototriac output devices
Mainly for photo-IC couplers
Mainly for photorelays (MOSFET output),
photovoltaic couplers and photo-IC couplers
Mainly for photo-IC couplers
Photocouplers