Datasheet

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SWITCHING CHARACTERISTICS
PARAMETER MEASUREMENT INFORMATION
+
-
+
-
V
I
V
ref
FEEDBACK
Amplifier Under Test
Other Amplifier
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
V
CC
= 15 V, over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS
(1)
MIN TYP
(2)
MAX UNIT
PWM Comparator Section (see Figure 2 )
Input threshold voltage, FEEDBACK Zero duty cycle 4 4.5 V
Input sink current, FEEDBACK FEEDBACK = 0.5 V 0.3 0.7 mA
Undervoltage Lockout Section (see Figure 2 )
T
A
= 25 ° C 6
Threshold voltage V
∆ T
A
= MIN to MAX 3.5 6.9
Hysteresis
(6)
100 mV
Overall Device
V
CC
= 15 V 9 15
R
T
at V
ref
,
Standby supply current mA
All other inputs and outputs open
V
CC
= 40 V 11 18
Average supply current DTC = 2 V, See Figure 2 12.4 mA
(6) Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.
V
CC
= 15 V, T
A
= 25 ° C, over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Output-voltage rise time 100 200 ns
Common-emitter configuration (see Figure 3 )
Output-voltage fall time 30 100 ns
Output-voltage rise time 200 400 ns
Emitter-follower configuration (see Figure 4 )
Output-voltage fall time 45 100 ns
Figure 1. Amplifier-Characteristics Test Circuit
5
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