TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS052C – APRIL 1988 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, V
(unless otherwise noted)
= 15 V,
CC
dead-time control section (see Figure 2)
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Input bias current
V = 0 to 5.25 V
I
–2
–10
µA
Maximum duty cycle, each output
DTC = 0 V
0.45
0
Zero duty cycle
Maximum duty cycle
3
3.3
Input threshold voltage
V
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
output section
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
V
C
= 40 V,
V
= 0 V,
V
CC
= 40 V
2
100
E
Collector off-state current
µA
DTC and OUTPUT CTRL = 0 V,
4
200
V
V
V
V
= 15 V,
V
= 0 V,
V
= 1 to 3 V
C
E
CC
= 0
Emitter off-state current
= V = 40 V,
C
V
–100
1.3
µA
V
CC
E
Common emitter
Emitter follower
= 0,
I
= 200 mA
1.1
1.5
E
C
C
E
Collector-emitter saturation voltage
= 15 V,
I
= –200 mA
2.5
Output control input current
V = V
I ref
3.5
mA
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
pwm comparator section (see Figure 2)
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
Input threshold voltage, FEEDBACK
Input sink current, FEEDBACK
Zero duty cycle
4
4.5
V
FEEDBACK = 0.5 V
0.3
0.7
mA
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
undervoltage lockout section (see Figure 2)
TL594C, TL594I
‡
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
6
T
A
= 25°C
Threshold voltage
V
∆T = MIN to MAX
A
3.5
6.9
§
Hysteresis
100
mV
‡
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.
TL594C, TL594I
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
15
V
V
= 15 V
= 40 V
9
RT at V
,
CC
ref
Standby supply current
Average supply current
mA
mA
All other inputs and outputs open
11
18
CC
DTC = 2 V,
See Figure 2
12.4
†
All typical values except for parameter changes with temperature are at T = 25°C.
A
5
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