TL494CD datasheet(3/14 Pages) ONSEMI

3 / 14 page

TL494, NCV494

http://onsemi.com

ELECTRICAL CHARACTERISTICS (VCC = 15 V, CT = 0.01 mF, RT = 12 kW, 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

ERROR AMPLIFIER SECTION

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

VIO

−

2.0

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

IIO

−

5.0

250

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

IIB

−

−0.1

−1.0

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

VICR

−0.3 to VCC−2.0

Open Loop Voltage Gain (

DVO = 3.0 V, VO = 0.5 V to 3.5 V, RL = 2.0 kW)

AVOL

−

Unity−Gain Crossover Frequency (VO = 0.5 V to 3.5 V, RL = 2.0 kW)

fC−

−

350

−

kHz

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

−

deg.

Common Mode Rejection Ratio (VCC = 40 V)

CMRR

−

Power Supply Rejection Ratio (

DVCC = 33 V, VO = 2.5 V, RL = 2.0 kW)

PSRR

−

100

−

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

IO−

0.3

0.7

−

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

IO+

2.0

−4.0

−

PWM COMPARATOR SECTION (Test Circuit Figure 11)

Input Threshold Voltage (Zero Duty Cycle)

VTH

−

2.5

4.5

Input Sink Current (V(Pin 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

Maximum Duty Cycle, Each Output, Push−Pull Mode

(VPin 4 = 0 V, CT = 0.01 mF, RT = 12 kW)

(VPin 4 = 0 V, CT = 0.001 mF, RT = 30 kW)

DCmax

−

Input Threshold Voltage (Pin 4)

(Zero Duty Cycle)

(Maximum Duty Cycle)

Vth

−

2.8

−

3.3

−

OSCILLATOR SECTION

Frequency (CT = 0.001 mF, RT = 30 kW)

fosc

−

kHz

Standard Deviation of Frequency* (CT = 0.001 mF, RT = 30 kW)

sfosc

−

3.0

−

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

Dfosc (DV)

−

0.1

−

Frequency Change with Temperature (

DTA = Tlow to Thigh)

(CT = 0.01 mF, RT = 12 kW)

Dfosc (DT)

−

UNDERVOLTAGE LOCKOUT SECTION

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

Vth

5.5

6.43

7.0

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

Average Supply Current

(CT = 0.01 mF, RT = 12 kW, V(Pin 4) = 2.0 V)

(VCC = 15 V) (See Figure 12)

−

7.0

−

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

n = 1

S (Xn − X)2

N − 1

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