TEA1708T1J

TEA1708T GreenChip X capacitor discharge IC Rev. 1 25 September 2013 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 k 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. The very low power consumption in combination with a large discharge current enables the use of a large value X capacitor to reduce EMI while retaining the low standby power. 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 k 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 Description Version TEA1708T SO8 plastic small outline package 8 leads body width 3.9 mm SOT96-1TEA1708T NXP Semiconductors GreenChip X capacitor discharge IC 5. Block diagram +9 9 9 705 9 705 9 +9 DDD Fig 1. TEA1708T block diagram 6. Pinning information 6.1 Pinning Q F +9 705 Q F Q F Q F 705 +9 DDD Fig 2. TEA1708T pinning diagram 6.2 Pin description Table 2. Pin description Symbol Pin Description n.c. 1 not connected TMR2 2 timer pin 2 n.c. 3 not connected TMR1 4 timer pin 1 HV2 5 high-voltage mains connection 2 n.c. 6 not connected n.c. 7 not connected HV1 8 high-voltage mains connection 1 TEA1708T All information provided in this document is subject to legal disclaimers. NXP B.V. 2013. All rights reserved. Product data sheet Rev. 1 25 September 2013 2 of 11 ,&