TEA1755LT All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 1.1 — 13 March 2015 22 of 35
NXP Semiconductors
TEA1755LT
HV start-up DCM/QR flyback controller with integrated DCM/QR PFC
controller
9. Thermal characteristics
10. Characteristics
Table 4. Thermal characteristics
Symbol Parameter Conditions Typ Unit
R
th(j-a)
thermal resistance from junction to ambient in free air; JEDEC test board 127 K/W
R
th(j-c)
thermal resistance from junction to case in free air; JEDEC test board 36 K/W
Table 5. Characteristics
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
Start-up current source (HV pin)
I
HV
current on pin HV V
HV
>75V
V
CC
<V
trip
0.9 1.1 1.3 mA
V
th(UVLO)
<V
CC
<V
startup
0.8 1 1.2 mA
V
trip
<V
CC
<V
th(UVLO)
45 6mA
with auxiliary supply - - 1.5 A
in Power-down mode; V
CC
= 0 V 5 12 25 A
V
BR
breakdown voltage 650 - - V
Supply voltage management (V
CC
pin)
V
trip
trip voltage 0.5 0.6 0.7 V
V
startup
start-up voltage 21.3 22.3 23.3 V
V
th(UVLO)
undervoltage lockout
threshold voltage
12.4 13.4 14.4 V
V
hys
hysteresis voltage V
startup
V
th(UVLO)
8.3 8.9 9.5 V
V
prot(UVLO)
undervoltage lockout
protection voltage
-V
th(UVLO)
+0.8
-V
I
ch(low)
low charging current V
HV
>75V
V
CC
<V
trip
1.15 1 0.85 mA
V
th(UVLO)
<V
CC
<V
startup
1.05 0.9 0.75 mA
I
ch(high)
high charging current V
HV
>75V; V
trip
<V
CC
<V
th(UVLO)
5.8 4.9 4mA
I
CC(oper)
operating supply
current
no-load on pins FBDRIVER and
PFCDRIVER; V
FBCTRL
=5V;
f
FB
=f
PFC
= 100 kHz; =30%
2.45 2.7 2.95 mA
IC in burst mode; no-load on pins
FBDRIVER and PFCDRIVER;
flyback switching; V
FBCTRL
=1.6V;
V
PFCSENSE
=0V
1.75 1.95 2.15 mA
IC in burst mode; flyback not
switching; V
FBCTRL
=0V;
V
PFCSENSE
=0V
1.24 1.35 1.46 mA
I
CC(prot)
protection supply
current
time-out protection triggered;
V
HV
=0V
0.3 0.45 0.6 mA