TEA1833LTS

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© NXP Semiconductors N.V. 2015. All rights reserved.

Product data sheet

Rev. 1 — 31 August 2015

6 of 24

NXP Semiconductors

TEA1833LTS

GreenChip SMPS control IC

controller stops switching. The TEA1833LTS activates the latched protection and enters

power-down mode. This mechanism avoids that during a short circuit a restart occurs

Section 7.7).

7.3 Supply management

All internal reference voltages are derived from a temperature compensated on-chip band

gap circuit. Internal reference currents are derived from a trimmed and temperature

compensated current reference circuit.

7.4 External overtemperature protection and mains detect input

(pin PROTECT)

The PROTECT input combines the functions of the mains voltage detection

(browin/brownout) and the external OverTemperature Protection (OTP). An internal clock

separates the period of measuring the mains voltage and the period of detecting external

OverTemperature Protection (OTP). In a typical application, the PROTECT pin is

connected to the mains via a resistor. It is connected to ground via a

Negative Temperature Coefficient (NTC) thermistor and a diode.

When measuring the mains voltage, the PROTECT pin is regulated to 0.25 V to prevent

that the external diode conducts current. The current into the PROTECT pin is measured

and stored. Once the measured current is above the brownin level, the system is allowed

Fig 4.

Start-up sequence, normal operation and latched protection