HLW8032

Part: HLW8032 — Hiliwi

Type: Single-phase metering IC

Description: High-precision electric energy metering IC for single-phase applications, capable of measuring active power, apparent power, current, and voltage with 0.2% active power error and 0.5% current/voltage error, featuring UART communication and a 5V power supply.

Operating Conditions:

• Supply voltage: 4.5–5.5 V
• Operating temperature: -40 to 85 °C
• Master clock frequency: 3.04–4.12 MHz

Absolute Maximum Ratings:

• Max supply voltage: +6.0 V
• Max analog input voltage: VDD+0.3 V
• Max storage temperature: 150 °C

Key Specs:

• Active power measurement error: ±0.2% (0.1%–100% input range)
• Current effective value measurement error: ±0.5% (0.2%–100% input range)
• Voltage effective value measurement error: ±0.5% (0.2%–100% input range)
• Current consumption: 4 mA (typical)
• Power consumption: 25 mW (typical, VDD = 5 V)
• Reference voltage: 2.43 V (typical)
• UART baud rate: 4800 bps
• Max differential input voltage for current: ±30.9 mV
• Max input voltage for voltage signal: ±495 mV

Features:

• Measures effective value of active power, apparent power, current, and voltage
• Active electric energy pulse output from PF pin
• Built-in frequency oscillator
• Built-in voltage reference source
• Built-in power supply monitoring circuit
• UART communication

Applications:

• Intelligent household appliances
• Metering socket
• Smart WIFI socket
• Charging pile for electromobile
• PDU equipment
• LED lighting
• Street lamp control

Package:

• SOP8

• Able to measure effective value of active power, apparent power, current and voltage
• Output of active electric energy pulse from PF pin
• Measuring error of active power reaches 0.2% with dynamic range of 1000:1
• Measuring error of effective current reaches 0.5% with dynamic range of 1000:1
• Measuring error of effective voltage reaches 0.5% within dynamic range of 1000:1
• Built-in frequency oscillator
• Built-in voltage reference source
• Built-in power supply monitoring circuit
• UART communication
• SOP8 packaging

Fig.2 chip pin Diagram

Table 1 Functional description of pins

Table 1 Functional description of pins

As shown in Fig.4, two small capacitors should be connected in parallel at power end of

HLW8032 to filter the high frequency and low frequency noise from grid.

The the electric current signal sampled by manganin resistor is connected to HLW8032, while the voltage signal is input to HLW8032 after passing resistance network. PF and TX are directly connected to input end of CPU. The current effective value, voltage effective value and active power are calculated via formula.

Fig.4 Typical application circuit of HLW8032