Optocouplers of the AOU115 series. Reference data

Encyclopedia of radio electronics and electrical engineering / Reference materials

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Thyristor optocouplers AOU115A, AOU115B, AOU115V, AOU115G, AOU115D consist of a gallium arsenide IR emitter and a photodetector - a silicon photodinistor, isolated from one another by an optically transparent mass. The devices are manufactured using hybrid technology.

Optocouplers are produced in a plastic case with rigid plate leads (Fig. 1). The mass of the device is not more than 0,8 g. The key in determining the pinout of the optocoupler is the upper part of the case in the figure, beveled at an angle of 45 degrees.

Main characteristics at Tacr.av = 25°C

• Turn-on current (emitter current), mA, no more, at a voltage of 10 V on a closed photodinistor......20
• Input voltage (voltage drop across the emitter), V, not more, at an input current of 20 mA......2
• Leakage current (through a closed photodinistor), µA, no more, at the maximum allowable voltage on the photodinistor ...... 5
• Output residual voltage (on an open photodinistor). V, no more, at a load current of 100 mA......2,5
• Output holding current (minimum load current at which the photodynistor remains open), mA, not more than ...... 10
• Turn-on time, µs, no more......10
• Turn-off time, µs......200
• Insulation resistance between input and output, GΩ, not less, at a voltage of 500 V......100
• Passing capacitance, pF, no more......8

Operating limits

• Maximum input direct current, mA......30
• The highest input pulse current, mA, with a pulse duration of 1 ms and a duty cycle of 10 ...... 60
• The highest input reverse voltage, V ...... 2
• Maximum input interference voltage¹, V ...... 0,6
• The highest direct output voltage on a closed photodinistor, V, for AOU115A ...... 50
• AOU115B, AOU115V......200
• AOU115G, AOU115D......400
• Maximum reverse DC voltage² on photodinistor, V, for AOU115V......200
• AOU115D......400
• The highest output direct current, mA, at an ambient temperature of +25°C or less......100
• +55°C......20
• Highest output average forward current. mA, at conduction angle³ 90 degrees, and an ambient temperature of +25 ° C or less ...... 15
• +55°C......5
• The highest output average forward current, mA, at a conduction angle of 180 degrees, and an ambient temperature of +25 ° C or less ...... 50
• +55°C......10
• The smallest direct output voltage on a closed photodinistor⁴, V ...... 10
• Critical output voltage slew rate, V/µs......0.75
• Insulation voltage between input and output, kV......1,5
• Operating range of ambient temperature, °C......-45...+55

The input current-voltage characteristic of optocouplers of the AOU115 series is shown in fig. 2.

The dependence of the output residual voltage of the photothyristor on the output current is shown in fig. 3 (the zone of technological spread is shaded)

On fig. 4 shows the maximum output current as a function of ambient temperature for direct current and various conduction angles.

The dependence of the insulation resistance on the applied voltage is shown in fig. 5.

In terms of their parameters, optocouplers of the AOU115 series are close to similar devices AOU103A - AOU103V, ZOU10ZA - ZOU103D and for most applications can replace them at a lower cost.

Notes

1. The maximum input interference voltage is the highest direct voltage at the input of the optocoupler, at which it does not switch from closed to open.
2. For optocouplers AOU115A, AOU115B, AOU115G reverse voltage supply is not allowed.
3. Conduction angle (previously used the term burning angle) - part of the period of the sinusoidal current of the thyristor in angular terms, during which the device is open, i.e., it passes the load current.
4. The smallest output voltage on a closed photodinistor is the smallest voltage at which it is still able to open.

Author: S. Biryukov, Moscow

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