TEA1738FT データシートの表示（PDF） - NXP Semiconductors.
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TEA1738FT Datasheet PDF : 20 Pages
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NXP Semiconductors
TEA1738FT
GreenChip 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
IO(PROTECT)
output current on pin VPROTECT = Vlow(PROTECT)
34
32
30
A
PROTECT
VPROTECT = Vhigh(PROTECT)
87
107
127
A
Vclamp(PROTECT) clamp voltage on pin II(PROTECT) = 200 A
[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
peak current
3.4
3.9
4.3
V
Rint(CTRL)
internal resistance on
pin CTRL
5
7
9
k
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
fmod
modulation frequency
modulation frequency high power
variation
210
280
350
Hz
3
4
5
kHz
max
Vstart(red)f
maximum duty cycle
frequency reduction
start voltage
pin CTRL transfer
between high and
medium power
-
80
-
%
-
2.7
-
V
going to low power
1.5
1.8
2.1
V
V(zero)
zero duty cycle
voltage
pin CTRL
1.25
1.55
1.85
V
Overpower protection (pin OPTIMER)
Vprot(OPTIMER)
protection voltage on
pin OPTIMER
2.4
2.5
2.6
V
Iprot(OPTIMER)
protection current on no overpower situation
100
150
200
A
pin OPTIMER
overpower situation
12.2
10.7
9.2
A
Restart timer (pin OPTIMER)
Vrestart(OPTIMER) restart voltage on pin low level
OPTIMER
high level
0.8
1.2
1.6
V
4.1
4.5
4.9
V
Irestart(OPTIMER)
restart current on pin charging OPTIMER
OPTIMER
capacitor
127
107
87
A
discharging OPTIMER
capacitor
0.1
0
0.1
A
TEA1738FT
Preliminary data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 30 December 2010
© NXP B.V. 2010. All rights reserved.
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