The CAP200DG - TL is a zero - power - consumption X - capacitor auto - discharge IC from Power Integrations' CAPZero - 2 series. Here is a detailed introduction:
1. Functional Features
Auto - discharge and Current Blocking
When the AC voltage is turned on, it blocks the current flowing through the X - capacitor discharge resistor, reducing the power consumption to less than 5mW at 230V AC. After the AC power is disconnected, it automatically discharges the X - capacitor by connecting a series discharge resistor, ensuring circuit safety.
Simplified EMI Filtering Design
It enables the use of larger - value X - capacitors. This allows for the miniaturization of inductive components without changing the power consumption, helping to optimize differential - mode EMI filtering and reducing the cost of inductors.
Self - powered Design
It adopts a self - powered approach, eliminating the need for external biasing. This reduces the use of external components, improving the simplicity and reliability of the system.
High Surge Resistance
It has high common - mode and differential - mode surge resistance. With an internally integrated 1000V MOSFET, it can operate stably without an external ground connection.
2. Technical Parameters
Breakdown Voltage
1000V
X - capacitor Range
100nF to 6mF
Total Series Resistance
7.5MΩ to 142kΩ
Operating Temperature
10°C to 105°C
Package Type
SO - 8 package with a lead pitch of 1.27mm, width of 3.9mm, length of 4.9mm, and a maximum seated height of 1.75mm
3. Application Areas
AC - DC Converters
In various AC - DC conversion circuits, it ensures the rapid discharge of the X - capacitor after power - off, improving power conversion efficiency, reducing standby power consumption, and meeting relevant energy - efficiency standards.
Home Appliances
Widely used in the power circuits of home appliances such as TVs, refrigerators, and air conditioners, it enables products to meet energy - saving standards like EuP Lot 6, enhancing the competitiveness of products.
Industrial Power Supplies
In the power systems of industrial automation equipment, communication base stations, etc., it can effectively protect circuit components, improve system stability and safety, and reduce electromagnetic interference.