TEA1708T/1集成電路（IC）的專用IC規(guī)格書PDF中文資料

General description

The TEA1708 is an automatic discharge IC for X capacitors with a low power

consumption (typically 1 mW at 230 V (AC).

A 500 V clamping circuit is integrated, protecting the IC during mains surges. In a typical

application with only two 200 kΩ resistors, the maximum differential mode mains surge

voltage allowed exceeds 6 kV. A metal-oxide varistor is not required to protect the IC.

The X-capacitor discharge current is internally limited to 2.3 mA. The discharge delay

timer is set externally using a low-voltage capacitor.

To reduce EMI while retaining the low standby power, the very low power consumption

with a high discharge current enables the use of a high value X-capacitor.

Features and benefits

? 1 mW power consumption at 230 V (AC)

? Integrated 500 V clamp; no metal oxide varistor required to protect the IC

? Self-Supplied, no external bias required

? Discharge current internally limited

? Adjustable discharge delay

? Very high differential surge: 6 kV with two 200 kΩ resistors

? Easier application design, resolving EMI issues while retaining the efficiency level