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TEA1738T Datasheet PDF : 21 Pages
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NXP Semiconductors
TEA1738T; TEA1738LT
GreenChip SMPS control IC
Table 5. Characteristics …continued
Tamb =2 5 °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
ICC(oper)
operating supply
no load on pin DRIVER;
-
0.55
-
mA
current
δ=2%
no load on pin DRIVER;
-0
.59
-
mA
δ =2 5%
Vrst(latch)
latched reset voltage
Input voltage sensing (pin VINSENSE)
4
5
6
V
Vstart(VINSENSE)
start voltage on pin
VINSENSE
detection level
0.89
0.94
0.99
V
Vdet(L)(VINSENSE)
LOW-level detection
voltage on pin
VINSENSE
0.68
0.72
0.76
V
IO(VINSENSE)
output current on pin
VINSENSE
-
−9-
nA
Vclamp(VINSENSE) clamp voltage on pin
VINSENSE
II(VINSENSE) =5 0 μA-
5.2
-
V
Protection input (pin PROTECT)
Vdet(L)(PROTECT)
LOW-level detection
voltage on pin
PROTECT
0.47
0.50
0.53
V
Vdet(H)(PROTECT)
HIGH-level detection
voltage on pin
PROTECT
0.75
0.8
0.85
V
IO(PROTECT)
output current on pin VPROTECT =V low(PROTECT)
−34
−32
−30
μA
PROTECT
VPROTECT =V high(PROTECT
87
107
127
μA
)
Vclamp(PROTECT) clamp voltage on pin II(PROTECT) = 200 μA
[1] 3.5
4.1
4.7
V
PROTECT
Peak current control (pin CTRL)
VCTRL
voltage on pin CTRL for minimum flyback peak
1.5
1.8
2.1
V
current
for maximum flyback
3.4
3.9
4.3
V
peak current
Rint(CTRL)
internal resistance on
pin CTRL
57
9
kΩ
IO(CTRL)
output current on pin
CTRL
Pulse width modulator
VCTRL =1 .4 V
VCTRL =3 .7 V
−0.7
−0.5
−0.28 −0.2
−0.3
mA
−0.12
mA
fosc
oscillator frequency peak power
high power
-
78
-
kHz
-
63
-
kHz
medium power
-
26.5
-
kHz
fmod
Δfmod
modulation frequency
modulation frequency
variation
high power
210
280
350
Hz
±3
±4
± 5k
Hz
δmax
maximum duty cycle
-
80
-
%
TEA1738T_TEA1738LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 14 January 2011
© NXP B.V. 2011. All rights reserved.
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