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I C×イサハヤ電子 - メーカー・企業と製品の一覧

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Timer latch function built-in overcurrent detection IC 'RT8H010C'

Timer latch function built-in overcurrent detection IC 'RT8H010C'

Ideal for preventing degradation or destruction of ICs and components from overcurrent such as load short circuits!

The "RT8H010C" is an IC that detects overcurrent in power and load lines. By inserting a current sensing resistor in the power and load lines, it monitors overcurrent based on the voltage difference across the resistor. When overcurrent is detected, it outputs a signal (High signal) to indicate an abnormal condition. It has a built-in timer circuit, which prevents false detection of inrush currents during power-up. The output format adopts a latch type, meaning that once overcurrent is detected, it will continue to output the abnormal signal even if the overcurrent condition is removed. To clear the abnormal detection state, it is necessary to either reset the power or input a reset signal to the product, allowing for a safe resumption of operation. The current value for detecting overcurrent and the timer duration can be set externally, allowing for flexible configuration according to the customer's circuit conditions.

  • ASIC
  • Dedicated IC
  • Other semiconductors

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Overcurrent and Overvoltage Detection IC "RT8H020C"

Overcurrent and Overvoltage Detection IC "RT8H020C"

Ideal for preventing degradation or destruction of ICs and components from overcurrent during load short circuits and overvoltage due to abnormalities in surrounding devices!

The 『RT8H020C』 is an IC that detects two abnormal conditions: overcurrent and overvoltage on the power and load lines. The overcurrent detection function monitors the voltage across a current sensing resistor connected externally to the IC, allowing it to detect overcurrent conditions. The detection circuit includes hysteresis to prevent false detection. The overvoltage detection function monitors the voltage of the target by using a resistor divider to scale down the voltage. The output is an OR output of the overcurrent detection signal and the overvoltage detection signal, which means that if either abnormal condition is detected, it will output a signal (Low) to indicate the abnormality. Additionally, the output format is open collector, allowing for input to different power systems (level shifting). The detection values for overcurrent and overvoltage can be set using resistors connected externally to the IC, allowing for flexible configuration according to the customer's circuit conditions.

  • ASIC
  • Dedicated IC
  • Other semiconductors

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Overvoltage detection IC with built-in timer latch function 'RT8H060/070C'

Overvoltage detection IC with built-in timer latch function 'RT8H060/070C'

Ideal for preventing degradation and destruction of ICs and components due to overvoltage caused by peripheral device abnormalities!

The RT8H060C and RT8H070C are ICs that detect overvoltage on power and signal lines. They monitor overvoltage by inputting a signal from a voltage divider of the power and load lines into the IC. When overvoltage is detected, they output a signal to indicate an abnormal condition. Since they have a built-in timer circuit, it is possible to prevent false detection from transient voltage spikes. The output format adopts a latch type, meaning that once overvoltage is detected, the signal indicating an abnormal condition continues to be output even after the overvoltage state is cleared. To reset the abnormal detection state, it is necessary to either recycle the power or input a reset signal to the product, allowing for safe resumption of operation. The voltage value for detecting overvoltage and the timer duration can be set externally for this product, allowing for flexible configuration according to the customer's circuit conditions.

  • ASIC
  • Dedicated IC
  • Other semiconductors

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Power Supply Voltage Monitoring IC 'RT8H182E'

Power Supply Voltage Monitoring IC 'RT8H182E'

Monitor voltage drop in the 2 systems! Additional overvoltage monitoring circuit can also be added!

RT8H182E is a power supply voltage monitoring IC that detects power supply voltage interruptions or drops and generates a reset signal (L output). It can monitor two power supply systems, including the power supply voltage. The monitoring voltage for the power supply voltage can be changed by external resistors. The detection voltage for the other power supply voltage can be adjusted using a resistor divider. It is also possible to set the delay time for reset release using an external capacitor. Additionally, this product has one built-in comparator. Since this comparator has an open-collector output, level shifting using any power supply is possible. By inputting the power supply voltage using a resistor divider, it can also be used for overvoltage detection. By connecting the reset output terminal to the input terminal of this comparator, it can also be used for logical inversion of the reset output.

  • ASIC

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Window-type reset IC 'RT8H232C'

Window-type reset IC 'RT8H232C'

A new product that can perform both voltage drop detection and overvoltage detection in one device!! Fail-safe functionality can be enhanced!!

This product can detect both voltage rise and fall with just one unit, enhancing the voltage monitoring function. Standard reset ICs typically only monitor one side (either overvoltage or undervoltage) and are referred to as single-type, but this product allows for monitoring on both sides, enabling it to perform two roles with a single unit. This product has two built-in comparators, each detecting voltage rise and fall. The comparators are designed with hysteresis to prevent malfunction due to chatter. Additionally, the outputs of the comparators are independent, allowing for individual output retrieval. However, since the output format is open collector, it can also be used as a wired OR through external connections.

  • Dedicated IC

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Timer latch function built-in overcurrent detection IC 'RT8H030C'

Timer latch function built-in overcurrent detection IC 'RT8H030C'

It is optimal for detecting overcurrent between the load device and GND, preventing degradation or destruction of ICs and components from overcurrent due to load short circuits, etc.!

This product monitors overcurrent by inserting a current detection resistor between the load device and GND, and it outputs a signal (High signal) to indicate an abnormal condition when overcurrent is detected. It has a built-in timer circuit, allowing the detection time to be set using an external resistor and capacitor for the time constant. The product includes an RS latch circuit, which continues to output an abnormality signal regardless of the presence of overcurrent after detecting overcurrent beyond the timer duration. To reset the latch, it is necessary to either reapply power or input a reset signal to the product, ensuring safe resumption of operation. As it is a low-side overcurrent detection type, the IC can operate with a separate power supply from the load. Therefore, it is also capable of detecting overcurrent for loads powered by high-voltage supplies.

  • ASIC

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LED driver IC 'RT8H164C'

LED driver IC 'RT8H164C'

LED driver capable of setting light intensity with short waveform input signals!

The "RT8H164C" is a 1-channel step-down LED driver. Dimming is possible by inputting a short waveform to the dimming terminal (DIM) and adjusting its duty cycle, and the LED current can be freely set using an external current setting resistor. Another significant feature is the ability to regenerate energy through an externally connected inductor, which helps save power consumption. Additionally, it is equipped with a UVLO (Under Voltage Lock Out) function that stops operation when a drop in power supply voltage is detected, as well as an overheat protection function that stops operation when a certain temperature is exceeded.

  • Dedicated IC

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Leakage current detection IC "RT8H044K"

Leakage current detection IC "RT8H044K"

Leakage detection IC with a built-in abnormal voltage detection function and a 1.5-wave, 3-pulse counting method!!

This product is an IC developed for leakage detection circuits for leakage protection, which connects a ZCT to the input terminal and detects the current generated through the ZCT when a leakage occurs. It uses a 1.5-wave 3-phase counting method, making it resistant to noise and optimal for leakage circuit breakers. It also has a built-in abnormal voltage detection function, allowing it to be used for neutral line phase loss protection. This abnormal voltage detection function can be disabled by connecting the PSAV terminal to GND. Additionally, the output format employs intermittent output, preventing damage to the trip coil in case of incorrect connections.

  • ASIC

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Overcurrent and overvoltage detection IC "RT8H040C"

Overcurrent and overvoltage detection IC "RT8H040C"

Ideal for preventing degradation or destruction of ICs and components from overcurrent during load short circuits and overvoltage due to abnormalities in surrounding devices!

The "RT8H040C" is an IC that detects two abnormal conditions: overcurrent and overvoltage on the load and GND lines. The overcurrent detection function monitors the voltage value of a current sensing resistor connected to GND to detect overcurrent conditions. The overvoltage detection function divides the voltage of the target being detected through a resistor divider and monitors that voltage value. Both the overcurrent and overvoltage detection functions are equipped with hysteresis in their detection sections, ensuring robust measures against false detection. The output is an OR output of the overcurrent detection signal and the overvoltage detection signal, which outputs a signal (Low) to indicate an abnormal condition if either one is detected. Additionally, the output format is open collector, allowing for input to different power systems (level shifting). The detection values for overcurrent and overvoltage can be set using resistors connected externally to the IC, allowing for flexible configuration according to the customer's circuit conditions.

  • ASIC

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Dimming signal generation PWM controller IC 'RT8H114C'

Dimming signal generation PWM controller IC 'RT8H114C'

PWM controller IC for generating dimming signals with adjustable duty ratio and frequency!

The "RT8H114C" generates pulse signals with adjustable duty ratio and frequency. Therefore, it is an ideal product for dimming LEDs based on the duty ratio of the on-time or for use with ICs that require pulse signal input. The duty ratio of the output signal can be set by adjusting the voltage at the DUTY terminal, and the frequency can be set by adjusting the values of the resistor and capacitor connected to the CT terminal. Additionally, by applying input voltage to the ON/OFF terminal, it is possible to forcibly drop the output to 0V. We also offer a free evaluation demo board that can be combined with the current driver IC (RT8H144C). Please feel free to contact our sales team when you need it!

  • ASIC

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LED driver IC with built-in open short detection function 'RT8H174E'

LED driver IC with built-in open short detection function 'RT8H174E'

LED driver with adjustable light output now features additional protection functions, including open and short circuit detection!

This product enables dimming by adjusting the duty cycle of the rectangular wave input to the dimming terminal (DIM) and allows for free setting of the LED current through an external electrical setting resistor. By adjusting the off time with an external resistor and capacitor connected to the CT terminal, energy can be recovered through an externally connected inductor, thereby saving power consumption. As a safety feature, it is equipped with a function that detects when the LED connection is open or shorted to the power supply and outputs an abnormal signal. Additionally, it has a UVLO function to prevent malfunction below 4V and also includes an overheating protection circuit.

  • ASIC

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Current driver IC "RT8H144C"

Current driver IC "RT8H144C"

Output current values can be adjusted according to the duty ratio of the pulse input signal!!

This product outputs current according to the duty of the pulse input signal from an external source. The base current value (the current value at 100% duty) can be arbitrarily set by the external resistor connected. Additionally, it can also be used as a signal converter to transform the duty signal into an analog signal. If the analog ports of the microcontroller you are using are insufficient, it is possible to generate an analog signal using this product along with a digital port.

  • ASIC

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Leakage current detection IC "RT8H064C"

Leakage current detection IC "RT8H064C"

Leak detection functionality realized in a compact package! Miniaturization of the set is possible!

This product is an IC developed for leakage detection circuits for leakage protection, which connects a ZCT to the input terminal and detects the current generated through the ZCT when a leakage occurs. It achieves leakage detection functionality in a compact package, contributing to the miniaturization of the set. It is possible to set the operating time based on the capacitance value connected to the external connection terminal. Additionally, the output format adopts a latch output, which retains the abnormal output once a leakage is detected.

  • ASIC

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