Broadcom optocouplers are a reliable choice for heat pump applications, providing unparalleled electrical isolation and signal integrity.
These components are essential in ensuring the safety and efficiency of heat pumps, which are increasingly becoming the go-to solution for sustainable heating and cooling.
HCNR201
The HCNR201 high-linearity analog optocoupler consists of a high-performance AlGaAs LED that illuminates two closely matched photodiodes. The input photodiode can be used to monitor, and therefore stabilize, the light output of the LED. As a result, the nonlinearity and drift characteristics of the LED can be virtually eliminated. The output photodiode produces a photocurrent that is linearly related to the light output of the LED. The close matching of the photodiode and advanced design of the package ensure the high linearity and stable gain characteristics of the optocoupler.
Features:
- Low Nonlinearity: 0.01%
- Low Gain Temperature Coefficient: -65 ppm/ degrees C
- Wide Bandwidth - DC to > 1 MHz
- Special Selection for HCNR201: Tighter K1, K3 and Lower Nonlinearity Available
Applications:
- Heat Pumps
- HVAC
- Industrial Process Control: Transducer Isolater, Isolater for Thermocouplers 4 mA to 20 mA Loop Isolation
- SMPS Feedback Loop, SMPS Feedforward
- Monitor Motor Supply Voltage
ACPL-C87X
The ACPL-C87B/C87A/C870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing. Its 2V input range and high 1GΩ input impedance, makes it well suited for isolated voltage sensing requirements in electronic power converters applications including motor drives and renewable energy systems. In a typical voltage sensing implementation, a resistive voltage divider is used to scale the DC-link voltage to suit the input range of the voltage sensor. A differential output voltage that is proportional to the input voltage is created on the other side of the optical isolation barrier.
Features:
- 0.5% High Gain Accuracy (ACPL-C87B only)
- Unity Gain 1V/V
- 0.1% Excellent Non-Linearity Max
- Active High Shutdown Pin
- Advanced Sigma-Delta A/D Modulation Technology
Applications:
- Heat Pumps
- HVAC
- Isolated Voltage Sensing in AC and Servo Motor Drives
- Isolated DC-Bus Voltage Sensing in Solar Inverters
- Wind Turbine Inverters
- Isolated Sensor Interfaces
- Signal Isolation in Data Acquisition Systems
- General Purpose Voltage Isolation
ACPL-C79x
The ACPL-C79B/C79A/C790 isolation amplifiers were designed for current sensing and voltage sensing in electronic power converters in applications including motor drives and renewable energy systems. In a typical motor drive implementation, current flows through an external resistor and the resulting analog voltage drop is sensed by the isolation amplifier. A differential output voltage that is proportional to the current is created on the other side of the optical isolation barrier.
Features:
- 0.5% High Gain Accuracy (ACPL-C79B only)
- 0.05% Excellent Linearity
- 200 kHz Wide Bandwidth
- Advanced Sigma-Delta A/D Converter Technology
- Fully Differential Isolation Amplifier
Applications:
- Heat Pumps
- HVAC
- Current Sensing & /Voltage Sensing in AC and Servo Motor Drive
- Solar Inverters, Wind Turbine Inverter
- Industrial Process Control
ACPL-M50L
The Broadcom ACPL-M50L (SO-5 package) is a low-power, low-input-current digital optocoupler. It features electrical insulation between input and output via an insulating layer between its LED and integrated photon detector. With separate connections for photodiode bias and output transistor collector, it achieves significantly increased speed compared to conventional photo-transistor couplers by reducing base collector capacitance. The ACPL-M50L boasts enhanced common-mode transient immunity of 15kV/µs minimum at VCM = 1500V across a wide temperature range (-40°C to 105°C). Its current transfer ratio (CTR) is typically 140% at IF = 3mA. Suitable for TTL/CMOS, TTL/LSTTL, or wide-bandwidth analog applications.
Features:
- Wide supply VCC voltage: 2.7V to 24V operation
- Low Drive Current: 3mA min
- TTL compatible
- Current transfer ratio (CTR) 140% typ
- Low Propagation Delay: 1µs max at 5V
Applications:
- Heat Pump
- HVAC
- Communications Interface
- Digital Signal Isolation
- Micro-controller Interface
- Feedback Elements in Switching Power Supplies
- Digital isolation for A/D, D/A conversion Digital field
ACPL-K370, ACPL-K376
The ACPL-K370 and ACPL-K376 are voltage/current threshold detection optocouplers. The ACPL-K376 is a low-current version of the ACPL-K370. To obtain lower current operation, the ACPL-K376 uses a high-efficiency AlGaAs LED which provides higher light output at lower drive currents. The devices utilize threshold sensing input buffer ICs which permit control of threshold levels over a wide range of input voltages with a single external resistor.
Features:
- ±5% voltage detection accuracy
- 1140 Vpeak wide AC or DC detection range
- User configurable single/dual detection levels
- 1.32 mA very low threshold current (ACPL-K376)
Applications:
- Heat Pumps
- HVAC
- Limit switch sensing
- Low voltage detector
- AC mains and DC link voltage detection
- Relay contact and coil voltage
- Current sensing
ACPL-K308U
The Industrial ACPL-K308U photovoltaic driver is designed to drive high voltage MOSFETs. It consists of an AlGaAs infrared light-emitting diode (LED) input stage optically coupled to an output detector circuit. The detector consists of a high-speed photovoltaic diode array and Turn off circuit. This photovoltaic driver turns on (contact closes) with a minimum input current of 5mA through the input LED. It turns off (contact opens) with an input voltage of 0.8V or less.
Features:
- Photovoltaic Driver for High Voltage MOSFETs in Solid State Relay Application
- Logic Circuit Compatibility
- Configurable to wide portfolio of high voltage MOSFETs
- Galvanic Isolation
- High Input-to-Output Insulation Voltage
Applications:
- Heat Pumps
- HVAC
- Solid State Relay Module
- Inrush current prevention
- Insulation Resistance Measurement in battery system, Solar PV Inverters; EV charging system; Motor Winding Insulation
ACHS-719X
The ACHS-719x product series is a fully integrated Hall Effect-based isolated linear current sensor device family designed for AC or DC current sensing in industrial, commercial and communications systems. The ±40A rated ACHS-7194 consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field that the Hall IC converts into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the differential Hall transducers.
Features:
- Output voltage proportional to AC or DC currents
- Ratiometric output from supply voltage
- Device bandwidth is set via FILTER pin:
- Factory-trimmed for accuracy
- Near zero magnetic hysteresis
Applications:
- Heat pumps
- Low-power inverter current sensing
- Motor phase and rail current sensing
- Solar inverters
- Chargers and Converters
- Switching Power Supplies
- eBikes
Common Types of Heat Pumps
Heat pumps may be segmented by the different sources from which heat is extracted.