Datasheet

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