TEA1753LT/N1,518 NXP Semiconductors, TEA1753LT/N1,518 Datasheet - Page 26

• Manufacturer Part Number: TEA1753LT/N1,518
• Description: IC CTLR SMPS SW MODE 16SO
• Manufacturer: NXP Semiconductors

Specifications of TEA1753LT/N1,518

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
11. Application information
TEA1753LT
Product data sheet
A power supply with the TEA1753LT consists of a power factor correction circuit followed
by a flyback converter. See
Capacitor C
rectified mains during start-up and via the auxiliary winding of the flyback converter during
operation. Sense resistors R
MOSFETs S1 and S2 into a voltage at pins PFCSENSE and FBSENSE. The values of
R
In the example given, the LATCH pin is connected to a Negative Temperature Coefficient
(NTC) resistor. The protection is activated when the resistance drops below a value as
calculated below.
A capacitor C
time-out protection is activated after 10 ms. R
does not interfere with the normal regulation loop.
R
normal operation due to negative voltage spikes across the sense resistors.
Resistor R
V
-------------------------------
Fig 17. Typical application diagram for the TEA1753LT IC
SENSE1
I
S1
prot LATCH
O LATCH
(
and R
(
and R
)
S2
AUX1
)
VCC
are added to prevent the soft start capacitors from being charged during
=
TIMEOUT
SENSE2
is added to protect the IC from damage during lightning events.
All information provided in this document is subject to legal disclaimers.
15.6 kΩ
buffers the IC supply voltage, which is powered via the high voltage
is connected to the FBCTRL pin. For a 120 nF capacitor, the
define the maximum primary peak current in MOSFETS S1 and S2.
Rev. 2 — 8 April 2011
Figure
SENSE1
8
6
7
3
12
17.
and R
11
TEA1753LT
SENSE2
2
LOOP
9
convert the current through the
is added so that the time-out capacitor
16 13
10
4
1
5
GreenChip III SMPS control IC
TEA1753LT
© NXP B.V. 2011. All rights reserved.
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