TEA1751T_LT_2
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 23 December 2009
22 of 29
NXP Semiconductors
TEA1751T; TEA1751LT
GreenChip III SMPS control IC
Output voltage sensing PFC (pin VOSENSE)
V
th(ol)(VOSENSE)
open-loop threshold voltage on
pin VOSENSE
-
1.15
-
V
V
reg(VOSENSE)
regulation voltage on pin
VOSENSE
for I
O(PFCCOMP)
= 0
2.475 2.500 2.525 V
V
ovp(VOSENSE)
overvoltage protection voltage
on pin VOSENSE
2.60
2.63
2.67
V
I
bst(dual)
dual boost current
V
VINSENSE
< V
bst(dual)
or
V
VOSENSE
< 2.1 V
-
-15
-
糀
V
VINSENSE
> V
bst(dual)
-
-30
-
nA
Overcurrent protection PFC (pin PFCSENSE)
V
sense(PFC)max
maximum PFC sense voltage 擵/攖 = 50 mV/約
0.49
0.52
0.55
V
擵/攖 = 200 mV/約
0.52
0.55
0.57
V
t
leb(PFC)
PFC leading edge blanking
time
250
310
370
ns
I
prot(PFCSENSE)
protection current on pin
PFCSENSE
50
-
5
nA
Soft start PFC (pin PFCSENSE)
I
start(soft)PFC
PFC soft start current
75
60
45
糀
V
start(soft)PFC
PFC soft start voltage
enabling voltage
0.46
0.50
0.54
V
R
start(soft)PFC
PFC soft start resistance
12
-
-
k?/DIV>
Oscillator PFC
f
sw(PFC)max
maximum PFC switching
frequency
100
125
150
kHz
t
off(PFC)min
minimum PFC off-time
1.1
1.4
1.7
約
Valley switching PFC (pin PFCAUX)
(擵/攖)
vrec(PFC)
PFC valley recognition voltage
change with time
-
-
1.7
V/約
t
vrec(PFC)
PFC valley recognition time
V
PFCAUX
= 1 V peak-to-peak
[2]
-
-
300
ns
demagnetization to 擵/攖 = 0
[3]
-
-
50
ns
t
to(vrec)PFC
PFC valley recognition time-out
time
3
4
6
約
Demagnetization management PFC (pin PFCAUX)
V
th(comp)PFCAUX
comparator threshold voltage
on pin PFCAUX
150 100 50
mV
t
to(demag)PFC
PFC demagnetization time-out
time
40
50
60
約
I
prot(PFCAUX)
protection current on pin
PFCAUX
V
PFCAUX
= 50 mV
75
-
5
nA
Driver (pin PFCDRIVER)
I
src(PFCDRIVER)
source current on pin
PFCDRIVER
V
PFCDRIVER
= 2 V
-
0.5
-
A
Table 5.
Characteristics &continued
T
amb
= 25 ?/SPAN>C; V
CC
= 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
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