If we want to design a Heat pump, what should we do?

What is heat pump?

Heat pumps offer an energy-efficient alternative to furnaces and air conditioners for all climates. Like your refrigerator, heat pumps use electricity to transfer heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into your warm house.  During the cooling season, heat pumps move heat from your house into the  outdoors. Because they transfer heat rather than generate heat, heat pumps can efficiently provide comfortable temperatures for your home. 

When we want to make a heat pump, we need to know some design requirements：

Modern residential heat pump system designs often require:

●Highly efficient, reliable, compact and low external machine interface (EMI) power supply and power factor correction (PFC) solutions.

●Accurate and robust carbon monoxide sensing and electric leakage monitoring.

●High efficiency and powerful motor control with enhanced protection.

●Secure, robust and low-power wireless connectivity.

The picture below is a design drawing, which contains 17 parts, namely Input power protection、Isolated AC/DC power supply、Non-isolated AC/DC power supply、Power protection & gating、Non-isolated DC/DC power supply、Sensors、Analog front end、Output user interface、Input user interface、System controller、Power stage、Wireless interface、Wired interface、Motor control、Self-diagnostics/monitoring、Signal isolation、Motor driver、Current sense. Each part has corresponding product classification, product model, and product applicable type. Next, I will introduce them to you one by one.

Input power protection

Protection for main power supply, including current protection, EMI protection and necessary circuit protection. Input power protection include General-purpose op amps and Audio op amps. Their corresponding models are TSV912、LM2904B、LM358B、OPA1654

Isolated AC/DC power supply

Off-line switch mode power supply solutions with multiple output rails (isolated and non-isolated) optimized for cost, efficiency, space and low EMI. Isolated AC/DC power supply include Flyback controllers、Isolated DC/DC converters & modules、Shunt voltage references、N-channel MOSFETs、SR & load share controllers. Their corresponding models are UCC28740、LM5021、UCC28610、DCP010505B、DCH010515S、TLV431A、LM4040、CSD17318Q2、UCC24650

Non-isolated AC/DC power supply

Cost effective, high efficiency and small form factor AC/DC solutions for power factor correction and bias power supply generation with excellent EMI performance. Non-isolated AC/DC power supply as the same as Isolated AC/DC power supply, their corresponding product models are all the same.

Power protection & gating

Highly integrated, small form factor, and fully protected solutions provide full safety for different low power voltage rails as well as gating solutions for lowest standby power. Power protection & gating include eFuses & hot swap controllers、Load switches. Their corresponding models are TPS2640、TPS2596、TPS22960、TPS22944

Non-isolated DC/DC power supply

Cost effective, high efficiency and small form factor DC/DC solutions with excellent EMI performance. Non-isolated DC/DC power supply include Buck converters (integrated switch)、Linear & low-dropout (LDO) regulators、Buck modules (integrated inductor)、Multi-channel ICs (PMICs)、Charge pumps (inductorless)、Boost converters (integrated switch)、N-channel MOSFETs、SR & load share controllers. Their corresponding models are LMR54406、TPS62932、TPS7A25、TLV1117LV、TPSM33615、TPS65219、TPS60400、TPS61220、CSD17318Q2、UCC24650

Sensors

Innovative solutions for a wide range of sensor types applicable to washers and dryers. Optimized for cost, performance and reliability. Sensors include Temperature switches、Digital temperature sensors、Analog temperature sensors、Signal conditioners、Linear Hall-effect sensors、Light sensors、Inductive sensor AFEs、Proximity sensors. Their corresponding product models are TMP302、TMP103、LMT01、LMT84、FDC1004、FDC2214、DRV5053、OPT3001、LDC1612、OPT3101

Analog front end

Signal conditioning solutions for a wide range of sensors applicable to washers and dryers. Analog and digital outputs are available ranging from cost-effective to high-end options. Analog front end include General-purpose op amps、Precision op amps (Vos<1mV)、Audio op amps、Comparators、High-speed op amps (GBW ≥ 50 MHz)、Analog switches & muxes、Series voltage references、Isolated amplifiers、Signal conditioners、Inductive sensor AFEs. Their corresponding product models are TSV912、LM2904B、TLV4376、OPA1654、TLV7022、TL331、OPA365、OPA835、TMUX4051、REF1933、AMC1200、FDC1004、LDC1614

Output user interface

Appealing, yet cost effective HMI solutions from indication LEDs to high-end touch screens & displays. Output user interface include Speaker amps、Backlight LED drivers、RGB LED drivers、LCD & OLED display power & drivers、Audio op amps. Their corresponding product models are TPA6211A1、TPS61165、LM3630A、TLC59116、TPS65105、OPA1654

Input user interface

Easy-to-implement touch key, switch and slider solutions with low power consumption - highly robust to moisture and EMI (especially conducted noise). Input user interface include MSP430 microcontrollers、Signal conditioners、Inductive sensor AFEs、I2C general-purpose I/Os (GPIOs). Their corresponding product models are MSP430F5528、FDC1004、LDC1312、TCA9535

Wireless interface

Robust, power-efficient and highly secure solutions and certified modules enabling rapid and easy addition of Wi-Fi and/or BLE connectivity to the Internet of Things (IoT). Wireless interface include Wi-Fi products、Low-power 2.4-GHz products、Other wireless products. Their corresponding product models are CC3301、CC2340R5、CC2620

Wired interface

Protected and robust connectivity solutions (isolated & non-isolated) in support of common standards such as SPI, I2C, CAN, LIN, RS485 and other proprietary protocols. Wired interface include ESD protection diodes、TVS diodes、RS-485 & RS-422 transceivers、RS-232 transceivers、I2C general-purpose I/Os (GPIOs)、Isolated RS-485 transceivers、Isolated CAN transceivers、I2C isolators. Their corresponding product models are ESD752、TPD2E001、TSM24CA、SN65HVD1794、TRS3232E、TCA9535、ISO1450、ISO1042、ISO1541

System controller

MCUs with advanced capabilities in secure wired and wireless connectivity, robust touch key solutions, power and stand-by management as well as high performance processors with multimedia options from simple displays to advanced HMIs. System controller include C2000 real-time microcontrollers、MSP430 microcontrollers、Low-power 2.4-GHz products. Their corresponding product models are TMS320F280039C、MSP430F5529、CC2340R5

Motor control

MCUs with advanced capabilities for high efficiency motor control and power management. Motor control include C2000 real-time microcontrollers、MSP430 microcontrollers. Their corresponding product models are TMS320F280039C、TMS320F2800132、MSP430F5528、MSP430F5529

Self-diagnostics/monitoring

Cost and board size-friendly solutions assure proper operation and/or reliably detect any fault conditions. Self-diagnostics/monitoring include Supervisor & reset ICs、Digital temperature sensors、Analog temperature sensors. Their corresponding product models are TPS3820、TLV809、TMP103、TMP107、LMT84

Signal isolation

Connectivity, gate driver, current sense and AFE solutions with integrated isolation (functional and re-enforced). Signal isolation include Digital isolators. It's corresponding product models are ISO7831/ISO6721

Power stage

Highly reliable solutions optimized for cost and size & pin-count drive single or multiple loads such as illumination LEDs, relays, valves or any kind of actuators with options for isolation and advanced protection. Power stage include Isolated gate drivers、Low-side drivers、Low-side switches、Isolated DC/DC converters & modules、N-channel MOSFETs、Half-bridge drivers、Stepper motor drivers、Solenoid drivers. Their corresponding product models are UCC21220、UCC27537、ULN2003A、DCP010505B、CSD17318Q2、UCC27211A、DRV8824、DRV110

Motor driver

Integrated solutions optimized for cost and size & pin-count to drive variety of motors. Always well protected and power efficient with high voltage and low voltage options. Motor driver include Stepper motor drivers、N-channel MOSFETs、Linear Hall-effect sensors、Hall-effect latches & switches. Their corresponding product models are DRV8824、CSD17318Q2、DRV5053、DRV5023

Current sense

Advanced current sense solutions (isolated & non-isolated) for a wide range of motor control applications and power supervision. Current sense include General-purpose op amps、Analog current-sense amplifiers、Audio op amps. Their corresponding product models are TSV912、TLV9042、INA213、INA240、OPA1654

This is our integrated circuits and reference designs, hope it can help you create advanced residential heat pump systems with high energy-efficiency star ratings and accurate sensing.