TL284X_10 Datasheet, PDF (5/21 Pages) Texas Instruments – CURRENT-MODE PWM CONTROLLERS

TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038G − JANUARY 1989 − REVISED FEBRUARY 2008
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
I_O = 1 mA,
V_CC = 12 V to 25 V
I_O = 1 mA to 20 mA
T_A = 25°C
Output voltage
with worst-case variation
V_CC = 12 V to 25 V, I_O = 1 mA to 20 mA
Output noise voltage
f = 10 Hz to 10 kHz, T_A = 25°C
Output-voltage long-term drift After 1000 h at T_A = 25°C
Short-circuit output current
† _{All typical values are at TA = 25°C.}
NOTE 4: Adjust V_CC 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
T_A = 25°C
V_CC = 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 V_CC 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
V_O = 2 V to 4 V
Supply-voltage rejection ratio
Output sink current
V_CC = 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, R_L = 15 kΩ to GND
Low-level output voltage
VFB at 2.7 V, R_L = 15 kΩ to GND
† _{All typical values are at TA = 25°C.}
NOTE 4: Adjust V_CC 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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