Cyp1837 Single Phase Energy Meter IC with Integrated Oscillator

• shape: Flat
• Conductive Type: Unipolar Integrated Circuit
• Integration: GSI
• Application: Specific Integrated Circuits
• Type: Digital IC
• Package: Sop8
• Model NO.: CYP1837
• Manner of Packing: Reel
• Devices Per Bag/Reel: 2500PCS
• Ship by: DHL/FedEx/ UPS
• Lead Time: 7 Working Days After Receiving Payment
• Trademark: CY
• Origin: China
• HS Code: 8542399000
• Production Capacity: 200000PCS/Year

Product Description

General Description

CYP1837 is a wide range of single-phase multi-function energy meter IC for single-phase socket, single-phase strip, Smart Appliance, with a low cost and high accuracy.
CYP1837 integrates two high-accuracy Sigma-Delta ADC, voltage reference, power management and other analog circuit modules, and digital signal processing circuit to calculate active power, IRMS, VRMS etc. High frequency CF1 is provided for indicating IRMS/VRMS and high frequency CF for energy metering.
CYP1837 can measure the single-phase active energy, active power, current and voltage RMS and other parameters to fully meet the needs of the socket, power strip, smart appliances and others.


Features

• High accuracy, less than ± 0.5% error over a dynamic range of 2500: 1
• High stability of large signal, in the condition of signal 300mA, less than ±0.2% error in the output frequency fluctuation (CF)
• High stability of small signal, in the condition of signal 50mA, less than ±0.3% error in the output frequency fluctuation (CF)
• Current and voltage RMS, current measurement range (4mA ~ 30A) @1mohm
• On-Chip anti-creep protection, Ensure noise power removal when there is no current
• On-Chip power supply detector. Detect power down state, the chip goes into a reset state when the operating voltage drops below 2.7V
• On-Chip voltage reference of 1.2V(typical)
• On-chip oscillator as clock source, the clock about 2 MHZ
• Single 3.3V supply, low power (8 mW  typical)
• Package:SOP8

Applications    

• Electric instrument
• Intelligent socket, intelligent circuit breaker
• Intelligent electric energy acquisition terminal

Pin Assignment

Pin No.	Pin Name	Description
1	VDD	Power Supply (+3.3V). It should be maintained at 3.0V~3.6V when IC is working.
2,3	IP,IN	Inputs for Current Channel. These inputs are fully differential voltage inputs with a maximum signal range of ± 50mV.Due to the internal ESD protection circuit, if the voltage overvoltage is ±1.5V, there will still not be too much damage.
4	VP	Positive Input for Voltage Channel. The Voltage Inputs is differential voltage inputs with a maximum signal range of ±200mV.(As above, the maximum signal amplitude is ±1.5V)
5	GND	Ground Reference.
6	CF	High frequency pulse output for active power, the high pulse width is fixed to 38uS; the frequency is proportional to the active power value. Over-current indication pin; If over-current occurs, the pin output 7.17KHz pulse.

7	CF1	SEL=0, the output indicates current RMS, high pulse width is fixed to 38uS,The frequency is proportional to the current RMS value; SEL=1, the output indicates voltage RMS, high pulse width is fixed to 38uS,The frequency is proportional to the voltage RMS value;
8	SEL	CF1 output select PIN. Internal pull-down resistor.