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