TL598

PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS053C – FEBRUARY 1988 – REVISED JULY 1999

9

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

† Frequency variation (

∆f) is the change in predicted oscillator

frequency that occurs over the full temperature range.

Figure 4

∆f = 1%

†

40

10

100

1 k

4 k

10 k

40 k

100 k

400 k

1 M

OSCILLATOR FREQUENCY AND

FREQUENCY VARIATION

vs

TIMING RESISTANCE

400

1 k

4 k

10 k

40 k

100 k

–2%

–1%

0%

CT = 1 µF

0.01

µF

0.001

µF

VCC = 15 V

†

RT – Timing Resistance – Ω

0.1

µF

20

0

80

40

1 k

10 k

100 k

1 M

60

f – Frequency – Hz

AMPLIFIER VOLTAGE AMPLIFICATION

vs

FREQUENCY

VCC = 15 V

∆VO = 3 V

TA = 25°C

Figure 3