TL494, NCV494
RECOMMENDED OPERATING CONDITIONS
Characteristics
Power Supply Voltage
Collector Output Voltage
Collector Output Current (Each transistor)
Amplified Input Voltage
Current Into Feedback Terminal
Reference Output Current
Timing Resistor
Timing Capacitor
Oscillator Frequency
Symbol
V
CC
V
C1
, V
C2
I
C1
, I
C2
V
in
l
fb
l
ref
R
T
C
T
f
osc
Min
7.0
−
−
−0.3
−
−
1.8
0.0047
1.0
Typ
15
30
−
−
−
−
30
0.001
40
Max
40
40
200
V
CC
− 2.0
0.3
10
500
10
200
Unit
V
V
mA
V
mA
mA
kW
mF
kHz
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
REFERENCE SECTION
Reference Voltage (I
O
= 1.0 mA)
Line Regulation (V
CC
= 7.0 V to 40 V)
Load Regulation (I
O
= 1.0 mA to 10 mA)
Short Circuit Output Current (V
ref
= 0 V)
OUTPUT SECTION
Collector Off−State Current
(V
CC
= 40 V, V
CE
= 40 V)
Emitter Off−State Current
V
CC
= 40 V, V
C
= 40 V, V
E
= 0 V)
Collector−Emitter Saturation Voltage (Note 2)
Common−Emitter (V
E
= 0 V, I
C
= 200 mA)
Emitter−Follower (V
C
= 15 V, I
E
= −200 mA)
Output Control Pin Current
Low State (V
OC
v
0.4 V)
High State (V
OC
= V
ref
)
Output Voltage Rise Time
Common−Emitter (See Figure 12)
Emitter−Follower (See Figure 13)
Output Voltage Fall Time
Common−Emitter (See Figure 12)
Emitter−Follower (See Figure 13)
I
C(off)
I
E(off)
−
−
2.0
−
100
−100
mA
mA
V
V
sat(C)
V
sat(E)
I
OCL
I
OCH
t
r
−
−
t
f
−
−
25
40
100
100
100
100
200
200
ns
−
−
−
−
1.1
1.5
10
0.2
1.3
2.5
−
3.5
mA
mA
ns
V
ref
Reg
line
Reg
load
I
SC
4.75
−
−
15
5.0
2.0
3.0
35
5.25
25
15
75
V
mV
mV
mA
Symbol
Min
Typ
Max
Unit
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
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