TL284X_07 Datasheet, PDF (5/18 Pages) Texas Instruments – CURRENT-MODE PWM CONTROLLERS

TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038F – JANUARY 1989 – REVISED FEBRUARY 2003
electrical characteristics over recommended operating free-air temperature range, V_CC = 15 V (see
Note 4), R_T = 10 kΩ, C_T = 3.3 nF (unless otherwise specified)
reference section
PARAMETER
TEST CONDITIONS
Output voltage
Line regulation
Load regulation
Temperature coefficient
of output voltage
IO = 1 mA,
VCC = 12 V to 25 V
IO = 1 mA to 20 mA
TA = 25°C
Output voltage
with worst-case variation
VCC = 12 V to 25 V, IO = 1 mA to 20 mA
Output noise voltage
f = 10 Hz to 10 kHz, TA = 25°C
Output-voltage long-term drift After 1000 h at TA = 25°C
Short-circuit output current
† _{All typical values are at TA = 25°C.}
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
oscillator section
TL284x
MIN TYP^†
4.95
5
6
6
MAX
5.05
20
25
0.2 0.4
TL384x
MIN TYP^†
4.9
5
6
6
MAX
5.1
20
25
UNIT
V
mV
mV
0.2 0.4 mV/°C
4.9
5.1 4.82
5.18 V
50
50
µV
5
25
5
25 mV
–30 –100 –180 –30 –100 –180 mA
PARAMETER
TEST CONDITIONS
TL284x
MIN TYP^† MAX
TL384x
MIN TYP^† MAX ^UNIT
Oscillator frequency (see Note 5)
Frequency change with supply voltage
Frequency change with temperature
TA = 25°C
VCC = 12 V to 25 V
47
52
57
47
52
57 kHz
2
10
2
10 Hz/kHz
50
50
Hz/kHz
Peak-to-peak amplitude at RT/CT
1.7
1.7
V
† _{All typical values are at TA = 25°C.}
NOTES: 4. Adjust VCC above the start threshold before setting it to 15 V.
5. Output frequency equals oscillator frequency for the TLx842 and TLx843. Output frequency is one-half the oscillator frequency for
the TLx844 and TLx845.
error-amplifier section
PARAMETER
TEST CONDITIONS
Feedback input voltage
COMP at 2.5 V
Input bias current
Open-loop voltage amplification
Gain-bandwidth product
VO = 2 V to 4 V
Supply-voltage rejection ratio
Output sink current
VCC = 12 V to 25 V
VFB at 2.7 V, COMP at 1.1 V
Output source current
VFB at 2.3 V, COMP at 5 V
High-level output voltage
VFB at 2.3 V, RL = 15 kΩ to GND
Low-level output voltage
VFB at 2.7 V, RL = 15 kΩ to GND
† _{All typical values are at TA = 25°C.}
NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.
TL284x
MIN TYP^†
2.45 2.50
–0.3
65
90
0.7
1
60
70
2
6
–0.5 –0.8
5
6
0.7
MAX
2.55
–1
1.1
TL384x
MIN TYP^†
2.42 2.50
–0.3
65
90
0.7
1
60
70
2
6
–0.5 –0.8
5
6
0.7
MAX
2.58
–2
1.1
UNIT
V
µA
dB
MHz
dB
mA
mA
V
V
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