TL598

PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS053C – FEBRUARY 1988 – REVISED JULY 1999

5

POST OFFICE BOX 655303

(unless otherwise noted)

undervoltage lockout section (see Note 4)

PARAMETER

TEST CONDITIONS†

TL598C

TL598Q

UNIT

PARAMETER

TEST CONDITIONS†

MIN

MAX

MIN

MAX

UNIT

Threshold voltage

TA = 25°C

4

6

4

6

V

Threshold voltage

∆TA = full range

3.5

6.9

3

6.9

V

Hysteresis‡

TA = 25°C

100

100

mV

Hysteresis‡

TA = full range

50

30

mV

† Full range is 0

°C to 70°C for the TL598C, and –40°C to 125°C for the TL598Q.

‡ Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.

NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.

output section (see Note 4)

PARAMETER

TEST CONDITIONS

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

High level output voltage

VCC = 15 V,

IO = –200 mA

12

V

High-level output voltage

CC

,

VC = 15 V

IO = –20 mA

13

V

Low level output voltage

VCC = 15 V,

IO = 200 mA

2

V

Low-level output voltage

CC

,

VC = 15 V

IO = 20 mA

0.4

V

Output control input current

VI = Vref

3.5

mA

Output-control input current

Iref

VI = 0.4 V

100

µA

NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.

dead-time control section (see Figure 1) (see Note 4)

PARAMETER

TEST CONDITIONS

TL598C

TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP§

MAX

MIN

TYP§

MAX

UNIT

Input bias current (DTC)

VI = 0 to 5.25 V

–2

–10

–2

–25

µA

Maximum duty cycle, each output

DTC = 0 V

0.45

0.45

Input threshold voltage (DTC)

Zero duty cycle

3

3.3

3

3.2

V

Input threshold voltage (DTC)

Maximum duty cycle

0

0

V

§ All typical values except for parameter changes with temperature are at TA = 25°C.

NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.

pwm comparator section (see Note 4)

PARAMETER

TEST CONDITIONS

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP§

MAX

UNIT

Input threshold voltage (FEEDBACK)

DTC = 0 V

3.75

4.5

V

Input sink current (FEEDBACK)

V(FEEDBACK) = 0.5 V

0.3

0.7

mA

§ All typical values except for parameter changes with temperature are at TA = 25°C.

NOTE Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.

total device (see Figure 1) (see Note 4)

PARAMETER

TEST CONDITIONS

TL598C, TL598Q

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP§

MAX

UNIT

Standby supply current

RT = Vref,

VCC = 15 V

15

21

mA

Standby supply current

All other inputs and outputs open

VCC = 40 V

20

26

mA

Average supply current

DTC = 2 V

15

mA

§ All typical values except for parameter changes with temperature are at TA = 25°C.

NOTE 4. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible.