TEA1713T/N1,518 NXP Semiconductors, TEA1713T/N1,518 Datasheet - Page 24

• 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
7.8.6 HBC feedback input (pin SNSFB)
The oscillator is controlled by the slope of the half-bridge. The oscillator charge current is
initially set to a low value I
detected, the charge current is increased to its normal value. This feature is used in
combination with the adaptive non-overlap time function as described in
and
switched off, the length of time the oscillator current is low will be negligible under normal
operating conditions.
In a typical power supply application, the output voltage is compared and amplified on the
secondary side. The output of the error amplifier is transferred to the primary side via an
opto-coupler. This opto-coupler can be connected directly to the SNSFB pin.
The SNSFB pin supplies the opto-coupler from an internal voltage source V
(typ. 8.4 V) with a series resistance R
via an external capacitor. To ensure sufficient bias current for the opto-coupler, the
feedback input has a threshold current I
at a minimum. The maximum frequency is reached at I
maximum frequency that can be reached via the SNSFB pin is lower (typ. 60 %) than the
maximum frequency that can be reached via the SSHBC/EN pin.
relationship between I
Fig 13. Function of R
Figure
A: C
B: C
C: C
11. Since the half-bridge slope normally starts directly after the MOSFET is
fmin
fmin
fmin
All information provided in this document is subject to legal disclaimers.
= high, R
= low, R
= low, R
f
HB
f
min(B and C)
f
limit(HB)
f
SNSFB
f
f
max(B)
max(A)
min(A)
fmax
Rev. 2 — 9 February 2011
fmax
fmax
fmax
= low
= too low
osc(red)
and C
= high
, V
0
SNSFB
fmin
(typ. 30 μA). When the start of the half-bridge slope is
and V
O(SNSFB)
fmin(SNSFB)
Resonant power supply control IC with PFC
RFMAX
V
fmax(fb)(RFMAX)
. The series resistance allows spike filtering
.
(typ. 0.66 mA) at which the frequency is
fmax(SNSFB)
V
fmax(ss)(RFMAX)
C
B
A
014aaa861
Figure 14
V
(typ 2.2 mA). The
RFMAX
TEA1713T
© NXP B.V. 2011. All rights reserved.
Section 7.8.4.2
pu(SNSFB)
shows the
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