TEA1742T/N1,118 NXP Semiconductors, TEA1742T/N1,118 Datasheet - Page 6

• Manufacturer Part Number: TEA1742T/N1,118
• Description: IC CTRLR GREENCHIP PFC 8-SOIC
• Manufacturer: NXP Semiconductors
• Series: GreenChip™r

Specifications of TEA1742T/N1,118

• Mode: Continuous Conduction (CCM)
• Frequency - Switching: 125kHz
• Current - Startup: 60µA
• Voltage - Supply: 10.6 V ~ 38 V
• Operating Temperature: -20°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935288647118

NXP Semiconductors
TEA1742T_1
Objective data sheet
7.1.2 Supply management
7.1.3 OverTemperature Protection (OTP)
7.2.1 t
7.2 Power factor correction circuit
All internal reference voltages are derived from a temperature compensated and trimmed
on-chip band gap circuit. Internal reference currents are derived from a temperature
compensated and trimmed on-chip current reference circuit.
An accurate internal temperature protection is provided in the circuit. When the junction
temperature exceeds the thermal shut-down temperature, the IC stops switching.
OTP is a latched protection. It can be reset by removing the voltage on pin V
The power factor correction circuit operates in quasi-resonant or discontinuous conduction
mode with valley switching. The next primary stroke is only started when the previous
secondary stroke has ended and the voltage across the PFC MOSFET has reached a
minimum value. The voltage on the PFCAUX pin is used to detect transformer
demagnetization and the minimum voltage across the external PFC MOSFET switch.
The power factor correction circuit is operated in t
reduction of a typical application is well within the class-D requirements.
on
Fig 4.
PFCDRIVER
control
PFCSENSE
VINSENSE
VOSENSE
Start-up sequence, normal operation and restart sequence
V
CC
and VCC
apply
mains
Rev. 01 — 10 February 2009
converter
starting
soft start
operation
normal
protection
on
control. The resulting mains harmonic
restart
GreenChip PFC controller
TEA1742T
© NXP B.V. 2009. All rights reserved.
V
V
V
V
start(VINSENSE)
START
UVLO
stop(VINSENSE)
CC
014aaa737
.
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