TL494

3

MOTOROLA ANALOG IC DEVICE DATA

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

ERROR AMPLIFIER SECTION

Input Offset Voltage (VO (Pin 3) = 2.5 V)

VIO

–

2.0

10

mV

Input Offset Current (VO (Pin 3) = 2.5 V)

IIO

–

5.0

250

nA

Input Bias Current (VO (Pin 3) = 2.5 V)

IIB

–

–0.1

–1.0

µA

Input Common Mode Voltage Range (VCC = 40 V, TA = 25°C)

VICR

–0.3 to VCC–2.0

V

Open Loop Voltage Gain (

∆VO = 3.0 V, VO = 0.5 V to 3.5 V, RL = 2.0 kΩ)

AVOL

70

95

–

dB

Unity–Gain Crossover Frequency (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ)

fC–

–

350

–

kHz

Phase Margin at Unity–Gain (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ)

φm

–

65

–

deg.

Common Mode Rejection Ratio (VCC = 40 V)

CMRR

65

90

–

dB

Power Supply Rejection Ratio (

∆VCC = 33 V, VO = 2.5 V, RL = 2.0 kΩ)

PSRR

–

100

–

dB

Output Sink Current (VO (Pin 3) = 0.7 V)

IO–

0.3

0.7

–

mA

Output Source Current (VO (Pin 3) = 3.5 V)

IO+

2.0

–4.0

–

mA

PWM COMPARATOR SECTION (Test Circuit Figure 11)

Input Threshold Voltage (Zero Duty Cycle)

VTH

–

2.5

4.5

V

Input Sink Current (V(Pin 3) = 0.7 V)

II–

0.3

0.7

–

mA

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

45

–

48

45

50

50

%

Input Threshold Voltage (Pin 4)

(Zero Duty Cycle)

(Maximum Duty Cycle)

Vth

–

0

2.8

–

3.3

–

V

OSCILLATOR SECTION

Frequency (CT = 0.001 µF, RT = 30 kΩ)

fosc

–

40

–

kHz

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

σfosc

–

3.0

–

%

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

∆fosc (∆V)

–

0.1

–

%

Frequency Change with Temperature (

∆TA = Tlow to Thigh)

(CT = 0.01 µF, RT = 12 kΩ)

∆fosc (∆T)

–

–

12

%

UNDERVOLTAGE LOCKOUT SECTION

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

Vth

5.5

6.43

7.0

V

TOTAL DEVICE

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

(VCC = 15 V)

(VCC = 40 V)

ICC

–

–

5.5

7.0

10

15

mA

Average Supply Current

(CT = 0.01 µF, RT = 12 kΩ, V(Pin 4) = 2.0 V)

(VCC = 15 V) (See Figure 12)

–

7.0

–

mA

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

σ

N

n = 1

Σ (Xn – X)2

N – 1