TL594 datasheet(3/12 Pages) MOTOROLA | PRECISION SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

3 page

TL594

MOTOROLA ANALOG IC DEVICE DATA

ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 µF, RT = 12 kΩ, unless otherwise noted.)

For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.

Characteristics

Symbol

Min

Typ

Max

Unit

PWM COMPARATOR SECTION (Test Circuit Figure 11)

Input Threshold Voltage (Zero Duty Cycle)

VTH

–

3.6

4.5

Input Sink Current (VPin 3 = 0.7 V)

II–

0.3

0.7

–

DEADTIME CONTROL SECTION (Test Circuit Figure 11)

Input Bias Current (Pin 4) (VPin 4 = 0 V to 5.25 V)

IIB (DT)

–

–2.0

–10

µA

Maximum Duty Cycle, Each Output, Push–Pull Mode

(VPin 4 = 0 V, CT = 0.01 µF, RT = 12 kΩ)

(VPin 4 = 0 V, CT = 0.001 µF, RT = 30 kΩ)

DCmax

–

Input Threshold Voltage (Pin 4)

(Zero Duty Cycle)

(Maximum Duty Cycle)

VTH

–

2.8

–

3.3

–

OSCILLATOR SECTION

Frequency

(CT = 0.001 µF, RT = 30 kΩ)

(CT = 0.01 µF, RT = 12 kΩ, TA = 25°C)

(CT = 0.01 µF, RT = 12 kΩ, TA = Tlow to Thigh)

fosc

–

9.2

9.0

–

10.8

kHz

Standard Deviation of Frequency* (CT = 0.001 µF, RT = 30 kΩ)

σfosc

–

1.5

–

Frequency Change with Voltage (VCC = 7.0 V to 40 V, TA = 25°C)

∆fosc (∆V)

–

0.2

1.0

Frequency Change with Temperature

(

∆TA = Tlow to Thigh, CT = 0.01 µF, RT = 12 kΩ)

∆fosc (∆T)

–

4.0

–

UNDERVOLTAGE LOCKOUT SECTION

Turn–On Threshold (VCC Increasing, Iref = 1.0 mA)

TA = 25°C

TA = Tlow to Thigh

Vth

4.0

3.5

5.2

–

6.0

6.5

Hysteresis

TL594C,I

TL594M

100

150

300

TOTAL DEVICE

Standby Supply Current (Pin 6 at Vref, All other inputs and outputs open)

(VCC = 15 V)

(VCC = 40 V)

ICC

–

8.0

Average Supply Current (VPin 4 = 2.0 V, CT = 0.01 µF, RT = 12 kΩ,

VCC = 15 V, See Figure 11)

–

* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula,

n = 1

Σ (Xn – X)2

N – 1

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