tea1738t NXP Semiconductors, tea1738t Datasheet - Page 14

• Manufacturer Part Number: tea1738t
• Description: Tea1738t; Tea1738lt Greenchip Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 5.
T
the IC; unless otherwise specified.
TEA1738T_TEA1738LT
Product data sheet
Symbol
N
V
V
Overpower protection (pin OPTIMER)
V
I
Restart timer (pin OPTIMER)
V
I
Current sense (pin ISENSE)
V
V
ΔV
t
Overpower compensation (pin VINSENSE and pin ISENSE)
I
Soft start (pin ISENSE)
I
V
R
Driver (pin DRIVER)
prot(OPTIMER)
restart(OPTIMER)
leb
opc(ISENSE)
start(soft)
amb
start(red)f
δ(zero)
prot(OPTIMER)
restart(OPTIMER)
sense(max)
th(sense)opp
start(soft)
cy(sw)δmax
start(soft)
ISENSE
= 25
/Δt
°
C; V
Characteristics
CC
= 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
Parameter
Number of switching
cycles with maximum
duty cycle
frequency reduction
start voltage
zero duty cycle voltage pin CTRL
protection voltage on
pin OPTIMER
protection current on
pin OPTIMER
restart voltage on pin
OPTIMER
restart current on pin
OPTIMER
maximum sense
voltage
overpower protection
sense threshold
voltage
slope compensation
voltage on pin ISENSE
leading edge blanking
time
overpower
compensation current
on pin ISENSE
soft start current
soft start voltage
soft start resistance
…continued
All information provided in this document is subject to legal disclaimers.
Conditions
pin CTRL transfer
between high and
medium power
pin CTRL going to low
power
no overpower situation
overpower situation
low level
high level
charging OPTIMER
capacitor
discharging OPTIMER
capacitor
ΔV/Δt = 50 mV/μs;
V
ΔV/Δt = 200 mV/μs;
V
ΔV/Δt = 50 mV/μs, high
power mode
V
V
V
V
V
enable voltage
VINSENSE
VINSENSE
VINSENSE
sense(max)
VINSENSE
sense(max)
CTRL
Rev. 2 — 14 January 2011
= 4 V;
=3 V;
= 0.78 V
= 0.78 V
= 1 V;
> 400 mV
> 400 mV
TEA1738T; TEA1738LT
Min
7
-
1.5
1.25
2.4
100
−12.2
0.8
4.1
−127
−0.1
0.48
0.50
370
-
250
-
-
−63
-
12
Typ
-
2.7
1.8
1.55
2.5
150
−10.7
1.2
4.5
−107
0
0.51
0.53
400
19
300
0.28
1.7
−55
V
-
sense(max)
GreenChip SMPS control IC
200
Max
8
-
2.1
1.85
2.6
−9.2
1.6
4.9
−87
0.1
0.54
0.56
430
-
350
-
-
−47
-
-
© NXP B.V. 2011. All rights reserved.
V
V
Unit
V
V
V
V
μA
μA
V
V
μA
μA
mV
mV/μs
ns
μA
μA
μA
V
kΩ
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