TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999
electrical characteristics over recommended operating free-air temperature range, V = 15 V (see
CC
Note 4), R = 10 kΩ, C = 3.3 nF (unless otherwise specified) (continued)
T
T
supply voltage
TL284x
TL384x
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
1
MIN TYP
MAX
1
Start-up current
0.5
11
0.5
11
mA
mA
V
Operating supply current
Limiting voltage
VFB and ISENSE at 0 V
17
17
I
= 25 mA
34
34
CC
†
All typical values are at T = 25°C.
A
NOTE 4: Adjust V
above the start threshold before setting it to 15 V.
CC
electricalcharacteristics,V =15V(seeNote4),R =10kΩ,C =3.3nF,T =25°C(unlessotherwise
CC
T
T
A
specified)
reference section
TL384xY
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
5
MAX
Output voltage
Line regulation
Load regulation
I
= 1 mA
V
mV
O
V
= 12 V to 25 V
CC
= 1 mA to 20 mA
6
I
O
6
mV
Temperature coefficient of output voltage
Output noise voltage
0.2
50
5
mV/°C
µV
f = 10 Hz to 10 kHz
After 1000 h at T = 25°C
Output-voltage long-term drift
Short-circuit output current
mV
A
–100
mA
NOTE 4: Adjust V
above the start threshold before setting it to 15 V.
CC
oscillator section
TL384xY
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
52
2
MAX
Oscillator frequency (see Note 5)
Frequency change with supply voltage
Frequency change with temperature
Peak-to-peak amplitude at RT/CT
kHz
Hz/kHz
Hz/kHz
V
V
CC
= 12 V to 25 V
5
1.7
NOTES: 4. Adjust V
above the start threshold before setting it to 15 V.
CC
5. Output frequency equals oscillator frequency for the TLx842 and TLx843. Output frequency is one-half oscillator frequency for the
TLx844 and TLx845.
6
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