TL284x, TL384x

CURRENT-MODE PWM CONTROLLERS

SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999

6

POST OFFICE BOX 655303

supply voltage

PARAMETER

TEST CONDITIONS

TL284x

TL384x

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

Start-up current

0.5

1

0.5

1

mA

Operating supply current

VFB and ISENSE at 0 V

11

17

11

17

mA

Limiting voltage

ICC = 25 mA

34

34

V

† All typical values are at TA = 25°C.

NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.

specified)

reference section

PARAMETER

TEST CONDITIONS

TL384xY

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output voltage

IO = 1 mA

5

V

Line regulation

VCC = 12 V to 25 V

6

mV

Load regulation

IO = 1 mA to 20 mA

6

mV

Temperature coefficient of output voltage

0.2

mV/

°C

Output noise voltage

f = 10 Hz to 10 kHz

50

µV

Output-voltage long-term drift

After 1000 h at TA = 25°C

5

mV

Short-circuit output current

–100

mA

NOTE 4: Adjust VCC above the start threshold before setting it to 15 V.

oscillator section

PARAMETER

TEST CONDITIONS

TL384xY

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Oscillator frequency (see Note 5)

52

kHz

Frequency change with supply voltage

VCC = 12 V to 25 V

2

Hz/kHz

Frequency change with temperature

5

Hz/kHz

Peak-to-peak amplitude at RT/CT

1.7

V

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 oscillator frequency for the

TLx844 and TLx845.