TLC598 Datasheet, PDF (6/10 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL598
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS053C – FEBRUARY 1988 – REVISED JULY 1999
electrical characteristics over recommended operating free-air temperature range, V_CC = 15 V
(unless otherwise noted)
switching characteristics, T_A = 25°C (see Note 4)
PARAMETER
TEST CONDITIONS
TL598C, TL598Q
UNIT
MIN TYP MAX
Output-voltage rise time
Output-voltage fall time
CL = 1500 pF,
See Figure 2
VC = 15 V,
VCC = 15 V,
60 150
ns
35
75
NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.
electrical characteristics, V_CC = 15 V, T_A = 25°C
reference section (see Note 4)
PARAMETER
TEST CONDITIONS
TL598Y
MIN _TYP† MAX ^UNIT
Output voltage (REF)
IO = 1 mA
5
V
Input regulation
VCC = 7 V to 40 V
2
mV
Output regulation
IO = 1 mA to 10 mA
1
mV
Output-voltage change with temperature
2
mV/V
Short-circuit output current‡
REF = 0 V
–48
mA
† _{All typical values except for parameter changes with temperature are at TA = 25°C.}
‡ _{Duration of the short circuit should not exceed one second.}
NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
oscillator section, C_T = 0.001 µF, R_T = 12 kΩ (see Figure 1) (see Note 4)
PARAMETER
TEST CONDITIONS
TL598Y
UNIT
MIN TYP MAX
+ ^{Ǹȍ ǒ Ǔ Frequency}
Standard deviation of frequency§
All values of VCC, CT, RT, TA constant
Frequency change with voltage
VCC = 7 V to 40 V,
§ _{Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:}
s
100
kHz
100
Hz/kHz
1
Hz/kHz
N
2
x_n–X
+n 1
N–1
NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
error amplifier section (see Note 4)
PARAMETER
TEST CONDITIONS
TL598Y
UNIT
MIN TYP MAX
Input offset voltage
Feedback = 2.5 V
2
mV
Input offset current
Feedback = 2.5 V
25
nA
Input bias current
Feedback = 2.5 V
0.2
µA
Open-loop voltage amplification
Unity-gain bandwidth
∆VO (FEEDBACK) = 3 V, VO (FEEDBACK) = 0.5 V to 3.5 V
95
dB
800
kHz
Common-mode rejection ratio
Output sink current (FEEDBACK)
VCC = 40 V,
FEEDBACK = 0.5 V
∆VIC = 6.5 V,
80
dB
0.7
mA
Phase margin at unity gain
FEEDBACK = 0.5 V to 3.5 V,
RL = 2 kΩ
65°
Supply-voltage rejection ratio
FEEDBACK = 2.5 V,
∆VCC = 33 V,
RL = 2 kΩ
100
dB
NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
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