HMHA281R1V

Output Type:	Transistor
Supplier Device Package:	4-Mini-Flat
Package / Case:	4-SOIC (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.3V (Max)
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	3µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	600% @ 5mA
Current Transfer Ratio (Min):	50% @ 5mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators are switching elements that utilize optical isolation to reject unwanted signals from electronic equipment, such as computers, and prevent damage or malfunction. They also prevent current and voltage buildup due to leakage currents. The HMHA281R1V is an optoisolator in the photovoltaic output family. It has a combination of features that make it suitable for a wide range of automotive, industrial, and consumer applications.

Overview

The HMHA281R1V is a dual phototransistor output opto-isolator. It features isolation-proof creepage distance to protect against high electric field interference and other environmental disturbances that could lead to catastrophic failure of the circuit. This optoisolator is designed to provide 24dB isolation between the input and output side of the optoisolator and to protect against overvoltage on the output side up to 30V.The integrated circuit is housed in an 8-pin SOIC package to save surface-mount board space and minimize the chances of EMI/RFI interference. The two output channels, VCC and output, provide fast response time, low operating temperature and low power consumption. With the low input current requirements of less than 7mA, this IC is well suited for use in applications that require long battery life and minimal power consumption.

Working Principle

The HMHA281R1V operates by using a light-emitting diode (LED) and a photo-transistor to electrically isolate the input and output sides of the opto-isolator. The LED and phototransistor are arranged in a light-tight cavity to ensure that they are not exposed to any ambient light sources, such as other lamps or sunlight.When current is applied to the LED, it emits a light that is focused on the phototransistor. When the intensity of the light reaches a certain threshold, the phototransistor is activated and enables a connection between the input voltage and the output voltage. The connection between the input and output is then maintained until the current applied to the LED is removed. Thus, the input side and the output side are electrically isolated.

Application Field

The HMHA281R1V has a wide range of applications in a variety of industries. It can be used in automotive and industrial controls to switch and control circuits, as well as in home appliances and consumer electronics.It is particularly well-suited for applications that require EMI/RFI immunity, such as in military electronic systems, medical equipment, and emergency signaling systems. Additionally, its low power consumption and wide operating temperature range make it a viable option for low power and temperature sensitive devices. It is also suitable for cost-sensitive applications such as instrumentation, communications, and security systems.In conclusion, the HMHA281R1V is a photovoltaic output optoisolator with a wide range of features that make it suitable for a variety of applications. It provides isolation-proof creepage distance to protect against high electric fields, fast response time, low operating temperature, and low power consumption. Additionally, the small size and low voltage requirements of this IC make it well suited for deployments in portable or temperature-sensitive applications.

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