TEA1708T
GreenChip X capacitor discharge IC
Rev. 1.1 — 6 April 2020
Product data sheet
1 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.
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GreenChip X capacitor discharger
TEA1708T
GreenChip X capacitor discharge IC
Rev. 1.1 — 6 April 2020
Product data sheet
1 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.
2 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
3 Applications
• All AC-connected power supplies with X-capacitors > 100 nF requiring a low load standby power.
4 Ordering information
Table 1. Ordering information
Type number
Package
Name
TEA1708T/1
SO8
Description plastic small outline package; 8 leads; body width 3.9 mm
Version SOT96-.