TEA1713T/N1,518 NXP Semiconductors, TEA1713T/N1,518 Datasheet - Page 16

• Manufacturer Part Number: TEA1713T/N1,518
• Description: IC CTLR RESONANT PFC 24SOIC
• Manufacturer: NXP Semiconductors

Specifications of TEA1713T/N1,518

• Package / Case: *
• Mounting Type: *
• Frequency - Switching: 125kHz
• Mode: Discontinuous Conduction (DCM)
• Switching Frequency: 125 KHz
• Maximum Power Dissipation: 0.8 W
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Operating Temperature: -
• Current - Startup: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 935289598518

NXP Semiconductors
TEA1713T
Product data sheet
7.7.3 PFC demagnetization sensing (pin SNSAUXPFC)
7.7.4 PFC valley sensing (pin SNSAUXPFC)
The voltage on the SNSAUXPFC pin is used to detect transformer demagnetization.
During the secondary stroke, the transformer is magnetized and current flows in the boost
output. During this time, V
MOSFET is kept off.
After some time, the transformer becomes demagnetized and current stops flowing in the
boost output. From that moment, V
started. The MOSFET remains off.
To ensure switching continues under all circumstances, the MOSFET is forced to
switch on if the magnetizing of the transformer (V
detected within t
It is recommended that a 5 kΩ series resistor be connected to this pin to protect the
internal circuitry, against lightning for example. The resistor should be placed close to the
IC on the printed circuit board to prevent incorrect switching due to external disturbances.
The PFC MOSFET is switched on for the next stroke to reduce switching losses and EMI
if the voltage at the drain of the MOSFET is at its minimum (valley switching),
see
Fig 7.
Figure
Relationship between on-time, SNSMAINS voltage and COMPPFC voltage
8.
All information provided in this document is subject to legal disclaimers.
to(mag)
t
on(max)(highmains)
t
on(max)(lowmains)
on-time
Rev. 2 — 9 February 2011
(typ. 50 μs) after GATEPFC goes LOW.
SNSAUXPFC
0
V
ton(COMPPFC)max
V
SNSMAINS
SNSAUXPFC
< V
demag(SNSAUXPFC)
V
= 3.3 V
SNSMAINS
Resonant power supply control IC with PFC
> V
SNSAUXPFC
demag(SNSAUXPFC)
V
= 0.9 V
ton(COMPPFC)zero
(typ. −100 mV) and the PFC
< V
V
demag(SNSAUXPFC)
COMPPFC
014aaa855
and valley detection is
TEA1713T
© NXP B.V. 2011. All rights reserved.
) is not
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