TL494, NCV494
ELECTRICAL CHARACTERISTICS
(V
CC
= 15 V, C
T
= 0.01
mF,
R
T
= 12 kW, unless otherwise noted.)
For typical values T
A
= 25°C, for min/max values T
A
is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics
ERROR AMPLIFIER SECTION
Input Offset Voltage (V
O (Pin 3)
= 2.5 V)
Input Offset Current (V
O (Pin 3)
= 2.5 V)
Input Bias Current (V
O (Pin 3)
= 2.5 V)
Input Common Mode Voltage Range (V
CC
= 40 V, T
A
= 25°C)
Open Loop Voltage Gain (DV
O
= 3.0 V, V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW)
Unity−Gain Crossover Frequency (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW)
Phase Margin at Unity−Gain (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW)
Common Mode Rejection Ratio (V
CC
= 40 V)
Power Supply Rejection Ratio (DV
CC
= 33 V, V
O
= 2.5 V, R
L
= 2.0 kW)
Output Sink Current (V
O (Pin 3)
= 0.7 V)
Output Source Current (V
O (Pin 3)
= 3.5 V)
PWM COMPARATOR SECTION
(Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle)
Input Sink Current (V
(Pin 3)
= 0.7 V)
DEADTIME CONTROL SECTION
(Test Circuit Figure 11)
Input Bias Current (Pin 4) (V
Pin 4
= 0 V to 5.25 V)
Maximum Duty Cycle, Each Output, Push−Pull Mode
(V
Pin 4
= 0 V, C
T
= 0.01
mF,
R
T
= 12 kW)
(V
Pin 4
= 0 V, C
T
= 0.001
mF,
R
T
= 30 kW)
Input Threshold Voltage (Pin 4)
(Zero Duty Cycle)
(Maximum Duty Cycle)
OSCILLATOR SECTION
Frequency (C
T
= 0.001
mF,
R
T
= 30 kW)
Standard Deviation of Frequency* (C
T
= 0.001
mF,
R
T
= 30 kW)
Frequency Change with Voltage (V
CC
= 7.0 V to 40 V, T
A
= 25°C)
Frequency Change with Temperature (DT
A
= T
low
to T
high
)
(C
T
= 0.01
mF,
R
T
= 12 kW)
UNDERVOLTAGE LOCKOUT SECTION
Turn−On Threshold (V
CC
increasing, I
ref
= 1.0 mA)
TOTAL DEVICE
Standby Supply Current (Pin 6 at V
ref
, All other inputs and outputs open)
(V
CC
= 15 V)
(V
CC
= 40 V)
Average Supply Current
(C
T
= 0.01
mF,
R
T
= 12 kW, V
(Pin 4)
= 2.0 V)
(V
CC
= 15 V) (See Figure 12)
I
CC
−
−
−
5.5
7.0
7.0
10
15
mA
−
mA
V
th
5.5
6.43
7.0
V
f
osc
sf
osc
Df
osc
(DV)
Df
osc
(DT)
−
−
−
−
40
3.0
0.1
−
−
−
−
12
kHz
%
%
%
I
IB (DT)
DC
max
45
−
V
th
−
0
2.8
−
3.3
−
48
45
50
50
V
−
−2.0
−10
mA
%
V
TH
I
I−
−
0.3
2.5
0.7
4.5
−
V
mA
V
IO
I
IO
I
IB
V
ICR
A
VOL
f
C−
f
m
CMRR
PSRR
I
O−
I
O
+
70
−
−
65
−
0.3
2.0
−
−
−
2.0
5.0
−0.1
−0.3 to V
CC
−2.0
95
350
65
90
100
0.7
−4.0
−
−
−
−
−
−
−
10
250
−1.0
mV
nA
mA
V
dB
kHz
deg.
dB
dB
mA
mA
Symbol
Min
Typ
Max
Unit
* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula,
s
N
S
(X
n
− X)
2
n=1
N−1
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