TL594

PULSEWIDTHMODULATION CONTROL CIRCUIT

SLVS052F − APRIL 1988 − REVISED NOVEMBER 2003

6

POST OFFICE BOX 655303

(unless otherwise noted) (continued)

dead-time control section (see Figure 2)

PARAMETER

TEST CONDITIONS

TL594C, TL594I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Input bias current

VI = 0 to 5.25 V

−2

−10

µA

Maximum duty cycle, each output

DTC = 0 V

0.45

Input threshold voltage

Zero duty cycle

3

3.3

V

Input threshold voltage

Maximum duty cycle

0

V

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

output section

PARAMETER

TEST CONDITIONS

TL594C, TL594I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VC = 40 V, VE = 0 V,

VCC = 40 V

2

100

Collector off-state current

DTC and OUTPUT CTRL = 0 V,

VC = 15 V,

VE = 0 V,

VCC = 1 to 3 V

4

200

µA

Emitter off-state current

VCC = VC = 40 V,

VE = 0

−100

µA

Collector-emitter saturation voltage

Common emitter

VE = 0,

IC = 200 mA

1.1

1.3

V

Collector-emitter saturation voltage

Emitter follower

VC = 15 V,

IE = −200 mA

1.5

2.5

V

Output control input current

VI = Vref

3.5

mA

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

pwm comparator section (see Figure 2)

PARAMETER

TEST CONDITIONS

TL594C, TL594I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Input threshold voltage, FEEDBACK

Zero duty cycle

4

4.5

V

Input sink current, FEEDBACK

FEEDBACK = 0.5 V

0.3

0.7

mA

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

undervoltage lockout section (see Figure 2)

PARAMETER

TEST CONDITIONS‡

TL594C, TL594I

UNIT

PARAMETER

TEST CONDITIONS‡

MIN

MAX

UNIT

Threshold voltage

TA = 25°C

6

V

Threshold voltage

∆TA = MIN to MAX

3.5

6.9

V

Hysteresis§

100

mV

‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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

PARAMETER

TEST CONDITIONS

TL594C, TL594I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Standby supply current

RT at Vref,

VCC = 15 V

9

15

mA

Standby supply current

RT at Vref,

All other inputs and outputs open

VCC = 40 V

11

18

mA

Average supply current

DTC = 2 V,

See Figure 2

12.4

mA

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