Description:

BL0972 is a built-in clock calibration-free power metering chip developed by Shanghai Belling Co.

It is suitable for electric bicycle charging pile, PDU, circuit breaker, 4~20mA analog acquisition and other fields that need metering.

The BL0972 integrates 2 power meters with a built-in clock. 

 BL0972 integrates two high-precision Sigma-Delta ADCs, which can simultaneously measure two signals (current or voltage) at the same time. 

BL0972 can measure current, voltage RMS, active power, active energy and other parameters, and can output fast current RMS (for over voltage).

BL0972 can measure current, voltage RMS, active power, active electric energy and other parameters, can output fast current RMS (for over-voltage, over-current and other fault detection), waveform output and other functions, through the high-speedSPI interface output data

Features:

⚫1U1I mode, 1 channel current, 1 channel voltage measurement  

⚫ High accuracy, AC active energy nonlinear measurement error less than 0.1% over input dynamic range (5000:1) 

⚫ AC voltage and current RMS, RMS nonlinearity measurement error less than 0.1% over the measurement dynamic range (2500:1) 

⚫ Input waveforms can be selected to obtain full-wave, fundamental or DC RMS and power. 

⚫ Optional DC signal measurement, input range 2000:1, measurement error <± 1% 

⚫ Built-in waveform register, can be used for waveform analysis 

⚫ Built-in temperature sensor, measurement range -40 ~ 85 ℃, measurement accuracy ± 3 ℃, to meet the product itself over-temperature monitoring, high current

node preset temperature offer, room temperature measurement and other needs 

⚫ Built-in active, reactive, energy, current\voltage RMS and angle registers 

⚫ SPI communication 

⚫ Anti-submarine design ensures noise excision when no current is present 

⚫ Power down monitoring, chip reset when below 2.7V 

⚫ Built-in benchmark reference voltage source 

⚫ Built-in oscillator circuit, clocked at about 8MHz  

⚫ Single operating supply 3.3V, low power consumption 30mW (typical) 

⚫ TSSOP20