TEA1752LT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 2 — 15 November 2012 23 of 33
NXP Semiconductors
TEA1752LT
HV start-up flyback controller with integrated PFC controller
V
reg(VOSENSE)
regulation voltage on the
VOSENSE pin
for I
O(PFCCOMP)
= 0 2.475 2.500 2.525 V
V
ovp(VOSENSE)
overvoltage protection voltage
on the VOSENSE pin
2.60 2.63 2.67 V
I
bst(dual)
dual boost current V
VINSENSE
<V
bst(dual)
or
V
VOSENSE
<2.1V
- 15 - A
V
VINSENSE
>V
bst(dual)
- 30 - nA
Over current protection PFC (PFCSENSE pin)
V
sense(PFC)max
maximum PFC sense voltage V/t = 50 mV/s 0.49 0.52 0.55 V
V/t = 200 mV/s 0.51 0.54 0.57 V
t
leb(PFC)
PFC leading edge blanking
time
250 310 370 ns
I
prot(PFCSENSE)
protection current on the
PFCSENSE pin
50 - 5nA
Soft-start PFC (PFCSENSE pin)
I
start(soft)PFC
PFC soft-start current 75 60 45 A
V
start(soft)PFC
PFC soft-start voltage enabling voltage 0.46 0.50 0.54 V
V
stop(soft)PFC
PFC soft-stop voltage disabling voltage 0.42 0.45 0.48 V
Oscillator PFC
f
sw(PFC)max
maximum PFC switching
frequency
-250-kHz
t
off(PFC)min
minimum PFC off-time . 0.8 1.1 1.4 s
Valley switching PFC (PFCAUX pin)
(V/t)
vrec(PFC)
PFC valley recognition voltage
change with time
--1.7V/s
t
vrec(PFC)
PFC valley recognition time V
PFCAUX
= 1 V peak-to-peak
[2]
--300ns
demagnetization to V/t=0
[3]
--50ns
t
to(vrec)PFC
PFC valley recognition time-out
time
346s
Demagnetization management PFC (PFCAUX pin)
V
th(comp)PFCAUX
comparator threshold voltage
on the PFCAUX pin
150 100 50 mV
t
to(demag)PFC
PFC demagnetization time-out
time
40 50 60 s
I
prot(PFCAUX)
protection current on the
PFCAUX pin
V
PFCAUX
=50mV 75 - 5nA
PFC off delay (PFCTIMER pin)
I
source(PFCTIMER)
source current on the
PFCTIMER pin
- 10 - A
I
sink(PFCTIMER)
sink current on the PFCTIMER
pin
V
PFCTIMER
= 5 V - 0.95 mA
V
start(PFCTIMER)
start voltage on the PFCTIMER
pin
-1.27-V
Table 5. Characteristics …continued
T
amb
=25
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