Low-End Phototransistor Couplers : TLP781 / TLP781F
Toshiba has newly released the TLP781, which is a standard and low-end photocoupler with transistor output. Since the TLP781 offers high isolation voltage of 5000 Vrms AC (min), it is suitable for a wide variety of applications such as switching power supplies, home appliances, office automation equipment, solid state relays, various controllers and signal transmission systems. Toshiba has also released the TLP781F, which is housed in a wide lead forming variant.
Features
- 4-pin DIP package:
TLP781: 7.62-mm lead pitch
TLP781F: 10.16-mm lead pitch - Collector-to-emitter voltage:
80 V (min) - Current transfer ratio:
50% (min)
Rank GB: 100% (min) - High isolation voltage:
5000 Vrms (min) - Operating temperature:
Topr = -55°C to 110°C
Applications
- Office equipment
- Home appliances
- Solid state relays
- Switching power supplies
- Various controllers
- Signal transmission systems between circuits with different voltages
Package Details and Pin Configuration
Recommended Operating Conditions
| Min | Typ. | Max | |
|---|---|---|---|
| Supply voltage VCC |
- | 5 V | 24 V |
| Forward current IF |
- | 16 mA | 25 mA |
| Collector current IC |
- | 1 mA | 10 mA |
| Operating temperature Topr |
-25 °C | - | 85 °C |
- These operating ranges are only provided as a design guide to achieve expected performance.
These parameters are independent of one another. The electrical characteristics provided in the relevant technical sheet must also not be exceeded.
Main Characteristics
| Test Conditions | Min | Trp. | Max | ||
|---|---|---|---|---|---|
| LED | Forward voltage VF |
IF = 10mA | 1.0 V | 1.15 V | 1.3 V |
| Reverse current IR |
VR = 5V | - | - | 10 μA | |
| Capacitance between terminals CT |
V = 0, f = 1MHz | - | 30 pF | - | |
| Detector | Collector-to-emitter breakdown voltage V(BR)CEO |
IC = 0.5mA | 80 V | - | - |
| Emitter-to-collector breakdown voltage V(BR)ECO |
IE = 0.1mA | 7 V | - | - | |
| Collector dark current ID(ICEO) |
VCE = 24V | - | 0.01 μA | 0.1 μA | |
| Collector-to-emitter Capacitance CCE |
V = 0, f = 1MHz | - | 10 pF | - | |
| Current transfer ratio (CTR) IC/IF |
IF = 5mA, VCE = 5V | 50 % | - | 600 % | |
| Saturated CTR IC/IF(sat) |
IF = 1mA, VCE = 0.4V | - | 60 % | - | |
| Collector-to-emitter saturation voltage VCE(sat) |
IC = 2.4mA, IF = 8mA | - | - | 0.4 V | |
| Input-to-output stray capacitance CS |
VS = 0, f = 1MHz | - | 0.8 pF | - | |
| Isolation resistance RS |
VS = 500V | 1 × 1012 Ω | 1014 Ω | - | |
| Isolation voltage BVS |
AC, 1min | 5000 Vrms | - | - | |
- Ta= 25°C