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TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
Electrical Characteristics
over recommended operating free-air temperature range, V
CC
= 15 V, f = 10 kHz (unless otherwise noted)
Output Section
PARAMETER
Collector off-state current
Emitter off-state current
Collector-emitter saturation voltage
Output control input current
(1)
Common emitter
Emitter follower
TEST CONDITIONS
V
CE
= 40 V, V
CC
= 40 V
V
CC
= V
C
= 40 V, V
E
= 0
V
E
= 0, I
C
= 200 mA
V
O(C1 or C2)
= 15 V, I
E
= –200 mA
V
I
= V
ref
1.1
1.5
MIN
TYP
(1)
2
MAX
100
–100
1.3
2.5
3.5
UNIT
µA
µA
V
mA
All typical values, except for temperature coefficient, are at T
A
= 25°C.
Dead-Time Control Section
See Figure 1
PARAMETER
Input bias current (DEAD-TIME CTRL)
Maximum duty cycle, each output
Input threshold voltage (DEAD-TIME CTRL)
(1)
TEST CONDITIONS
V
I
= 0 to 5.25 V
V
I
(DEAD-TIME CTRL) = 0, C
T
= 0.01
µF,
R
T
= 12 kΩ
Zero duty cycle
Maximum duty cycle
0
MIN TYP
(1)
–2
45
3
3.3
MAX
–10
UNIT
µA
%
V
All typical values, except for temperature coefficient, are at T
A
= 25°C.
PWM Comparator Section
See Figure 1
PARAMETER
Input threshold voltage (FEEDBACK)
Input sink current (FEEDBACK)
(1)
Zero duty cyle
V (FEEDBACK) = 0.7 V
0.3
TEST CONDITIONS
MIN TYP
(1)
4
0.7
MAX
4.5
UNIT
V
mA
All typical values, except for temperature coefficient, are at T
A
= 25°C.
Total Device
PARAMETER
Standby supply current
Average supply current
(1)
TEST CONDITIONS
R
T
= V
ref
,
All other inputs and outputs open
V
CC
= 15 V
V
CC
= 40 V
MIN TYP
(1)
6
9
7.5
MAX
10
15
UNIT
mA
mA
V
I
(DEAD-TIME CTRL) = 2 V, See Figure 1
All typical values, except for temperature coefficient, are at T
A
= 25°C.
Switching Characteristics
T
A
= 25°C
PARAMETER
Rise time
Fall time
Rise time
Fall time
TEST CONDITIONS
Common-emitter configuration, See Figure 3
Emitter-follower configuration, See Figure 4
MIN TYP
(1)
100
25
100
40
MAX
200
100
200
100
UNIT
ns
ns
ns
ns
(1)
All typical values, except for temperature coefficient, are at T
A
= 25°C.
5
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