NXP Semiconductors
TEA1751T; TEA1751LT
GreenChip III SMPS control IC
Table 5. Characteristics …continued
Tamb = 25 °C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max Unit
Output voltage sensing PFC (pin VOSENSE)
Vth(ol)(VOSENSE)
open-loop threshold voltage on
pin VOSENSE
-
1.15 -
V
Vreg(VOSENSE)
regulation voltage on pin
VOSENSE
for IO(PFCCOMP) = 0
2.475 2.500 2.525 V
Vovp(VOSENSE)
overvoltage protection voltage
on pin VOSENSE
2.60 2.63 2.67 V
Ibst(dual)
dual boost current
Overcurrent protection PFC (pin PFCSENSE)
VVINSENSE < Vbst(dual) or
VVOSENSE < 2.1 V
VVINSENSE > Vbst(dual)
-
-15 -
μA
-
-30 -
nA
Vsense(PFC)max
maximum PFC sense voltage ΔV/Δt = 50 mV/μs
ΔV/Δt = 200 mV/μs
0.49 0.52 0.55 V
0.52 0.55 0.57 V
tleb(PFC)
PFC leading edge blanking
time
250 310 370 ns
Iprot(PFCSENSE)
protection current on pin
PFCSENSE
−50 -
−5 nA
Soft start PFC (pin PFCSENSE)
Istart(soft)PFC
Vstart(soft)PFC
Rstart(soft)PFC
Oscillator PFC
PFC soft start current
PFC soft start voltage
PFC soft start resistance
enabling voltage
−75 −60 −45 μA
0.46 0.50 0.54 V
12 -
-
kΩ
fsw(PFC)max
maximum PFC switching
frequency
100 125 150 kHz
toff(PFC)min
minimum PFC off-time
Valley switching PFC (pin PFCAUX)
1.1 1.4 1.7 μs
(ΔV/Δt)vrec(PFC)
PFC valley recognition voltage
change with time
-
-
1.7 V/μs
tvrec(PFC)
PFC valley recognition time VPFCAUX = 1 V peak-to-peak
[2] -
-
300 ns
demagnetization to ΔV/Δt = 0
[3] -
-
50 ns
tto(vrec)PFC
PFC valley recognition time-out
time
3
4
6
μs
Demagnetization management PFC (pin PFCAUX)
Vth(comp)PFCAUX
comparator threshold voltage
on pin PFCAUX
−150 −100 −50 mV
tto(demag)PFC
PFC demagnetization time-out
time
40 50 60 μs
Iprot(PFCAUX)
protection current on pin
PFCAUX
VPFCAUX = 50 mV
−75 -
−5 nA
Driver (pin PFCDRIVER)
Isrc(PFCDRIVER)
source current on pin
PFCDRIVER
VPFCDRIVER = 2 V
-
−0.5 -
A
TEA1751T_LT_2
Product data sheet
Rev. 02 — 23 December 2009
© NXP B.V. 2009. All rights reserved.
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