TL594
PULSE WIDTH MODULATION CONTROL CIRCUIT
SLVS052F − APRIL 1988 − REVISED NOVEMBER 2003
electrical characteristics over recommended operating free-air temperature range, V
CC
= 15 V,
(unless otherwise noted) (continued)
dead-time control section (see Figure 2)
PARAMETER
Input bias current
Maximum duty cycle, each output
Input threshold voltage
TEST CONDITIONS
VI = 0 to 5.25 V
DTC = 0 V
Zero duty cycle
Maximum duty cycle
0
TL594C, TL594I
MIN TYP†
MAX
−2
0.45
3
3.3
V
−10
UNIT
µA
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
output section
PARAMETER
TEST CONDITIONS
VC = 40 V, VE = 0 V, VCC = 40 V
DTC and OUTPUT CTRL = 0 V,
VC = 15 V,
VE = 0 V,
VCC = 1 to 3 V
Common emitter
Collector-emitter saturation voltage
Output control input current
Emitter follower
VCC = VC = 40 V,
VE = 0,
VC = 15 V,
VI = Vref
VE = 0
IC = 200 mA
IE = −200 mA
TL594C, TL594I
MIN TYP†
MAX
2
4
100
200
−100
1.1
1.5
1.3
2.5
3.5
V
mA
µA
µA
UNIT
Collector off-state current
Emitter off-state current
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
pwm comparator section (see Figure 2)
PARAMETER
Input threshold voltage, FEEDBACK
Input sink current, FEEDBACK
TEST CONDITIONS
Zero duty cycle
FEEDBACK = 0.5 V
0.3
TL594C, TL594I
MIN TYP†
MAX
4
0.7
4.5
UNIT
V
mA
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
undervoltage lockout section (see Figure 2)
PARAMETER
Threshold voltage
Hysteresis§
TEST CONDITIONS‡
TA = 25°C
∆T
A = MIN to MAX
TL594C, TL594I
MIN
3.5
100
MAX
6
6.9
V
mV
UNIT
‡ 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.
PARAMETER
Standby supply current
Average supply current
TEST CONDITIONS
RT at Vref,
All other inputs and outputs open
DTC = 2 V,
VCC = 15 V
VCC = 40 V
See Figure 2
TL594C, TL594I
MIN TYP†
MAX
9
11
12.4
15
18
UNIT
mA
mA
† All typical values, except for parameter changes with temperature, are at TA = 25°C.
6
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•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
