TLC598 Datasheet, PDF (4/10 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)
reference section (see Note 4)
PARAMETER
TEST CONDITIONS†
TL598C
MIN TYP‡ MAX
TL598Q
MIN TYP‡ MAX ^UNIT
Output voltage (REF)
Input regulation
Output regulation
Output voltage change with
temperature
IO = 1 mA
VCC = 7 V to 40 V
IO = 1 mA to 10 mA
∆TA = MIN to MAX
TA = 25°C
TA = full range
TA = 25°C
TA = 25°C
TA = full range
4.95
5 5.05 4.95
5 5.05
V
4.9
5.1 4.9
5.1
2
25
2
22 mV
1
15
50
1
15
mV
80
2
10
2
10 mV/V
Short-circuit output current§ REF = 0 V
–10 –48
–10 –48
mA
† _{Full range is 0°C to 70°C for the TL598C, and –40°C to 125°C for the TL598Q.}
‡ _{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†
TL598C, TL598Q
MIN TYP‡ MAX ^UNIT
Frequency
100
kHz
Standard deviation of frequency¶
All values of VCC, CT, RT, TA constant
100
Hz/kHz
Frequency change with voltage
VCC = 7 V to 40 V, TA = 25°C
Frequency change with temperature#
∆TA = full range
∆TA = full range,
CT = 0.01 µF
† _{Full range is 0°C to 70°C for the TL598C, and –40°C to 125°C for the TL598Q.}
ȍ ǒ Ǔ ^‡ All typical values except for parameter changes with temperature are at TA = 25°C.
+ Ǹ ¶ Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
+ _s
1
10 Hz/kHz
70 120
Hz/kHz
50
80
N
2
xn–X
n1
N–1
# _{Effects of temperature on external RT and CT are not taken into account.}
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
TL598C, TL598Q
MIN TYP‡ MAX ^UNIT
Input offset voltage
FEEDBACK = 2.5 V
2
10 mV
Input offset current
FEEDBACK = 2.5 V
25 250 nA
Input bias current
FEEDBACK = 2.5 V
0.2
1 µA
Common-mode input voltage range VCC = 7 V to 40 V
0 to
VCC–2
V
Open-loop voltage amplification
∆VO (FEEDBACK) = 3 V, VO (FEEDBACK) = 0.5 V to 3.5 V
70
95
dB
Unity-gain bandwidth
800
kHz
Common-mode rejection ratio
VCC = 40 V,
∆VIC = 6.5 V,
TA = 25°C
65
80
dB
Output sink current (FEEDBACK) FEEDBACK = 0.5 V
0.3 0.7
mA
Output source current (FEEDBACK) FEEDBACK = 3.5 V
–2
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
‡ _{All typical values except for parameter changes with temperature are at TA = 25°C.}
NOTE 4. Pulse-testing techniques that maintain the junction temperature as close to the ambient temperature as possible must be used.
4
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