TL494_10 Datasheet, PDF (3/14 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL494, NCV494
ELECTRICAL CHARACTERISTICS (V_CC = 15 V, C_T = 0.01 mF, R_T = 12 kW, unless otherwise noted.)
For typical values T_A = 25°C, for min/max values T_A is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics
Symbol
Min
Typ
Max
Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage (V_{O (Pin 3)} = 2.5 V)
Input Offset Current (V_{O (Pin 3)} = 2.5 V)
Input Bias Current (V_{O (Pin 3)} = 2.5 V)
Input Common Mode Voltage Range (V_CC = 40 V, T_A = 25°C)
Open Loop Voltage Gain (DV_O = 3.0 V, V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Unity−Gain Crossover Frequency (V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Phase Margin at Unity−Gain (V_O = 0.5 V to 3.5 V, R_L = 2.0 kW)
Common Mode Rejection Ratio (V_CC = 40 V)
Power Supply Rejection Ratio (DV_CC = 33 V, V_O = 2.5 V, R_L = 2.0 kW)
Output Sink Current (V_{O (Pin 3)} = 0.7 V)
Output Source Current (V_{O (Pin 3)} = 3.5 V)
PWM COMPARATOR SECTION (Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle)
Input Sink Current (V_{(Pin 3)} = 0.7 V)
DEADTIME CONTROL SECTION (Test Circuit Figure 11)
Input Bias Current (Pin 4) (V_{Pin 4} = 0 V to 5.25 V)
Maximum Duty Cycle, Each Output, Push−Pull Mode
(V_{Pin 4} = 0 V, C_T = 0.01 mF, R_T = 12 kW)
(V_{Pin 4} = 0 V, C_T = 0.001 mF, R_T = 30 kW)
Input Threshold Voltage (Pin 4)
(Zero Duty Cycle)
(Maximum Duty Cycle)
V_IO
I_IO
I_IB
V_ICR
A_VOL
f_C−
f_m
CMRR
PSRR
I_O−
I_O+
V_TH
I_I−
I_{IB (DT)}
DC_max
V_th
−
2.0
10
mV
−
5.0
250
nA
−
−0.1
−1.0
mA
−0.3 to V_CC−2.0
V
70
95
−
dB
−
350
−
kHz
−
65
−
deg.
65
90
−
dB
−
100
−
dB
0.3
0.7
−
mA
2.0
−4.0
−
mA
−
2.5
4.5
V
0.3
0.7
−
mA
−
−2.0
−10
mA
%
45
48
50
−
45
50
V
−
2.8
3.3
0
−
−
OSCILLATOR SECTION
Frequency (C_T = 0.001 mF, R_T = 30 kW)
Standard Deviation of Frequency* (C_T = 0.001 mF, R_T = 30 kW)
Frequency Change with Voltage (V_CC = 7.0 V to 40 V, T_A = 25°C)
Frequency Change with Temperature (DT_A = T_low to T_high)
(C_T = 0.01 mF, R_T = 12 kW)
UNDERVOLTAGE LOCKOUT SECTION
Turn−On Threshold (V_CC increasing, I_ref = 1.0 mA)
TOTAL DEVICE
Standby Supply Current (Pin 6 at V_ref, All other inputs and outputs open)
(V_CC = 15 V)
(V_CC = 40 V)
Average Supply Current
(C_T = 0.01 mF, R_T = 12 kW, V_{(Pin 4)} = 2.0 V)
(V_CC = 15 V) (See Figure 12)
f_osc
−
sf_osc
−
Df_osc (DV)
−
Df_osc (DT)
−
V_th
5.5
I_CC
−
−
−
40
3.0
0.1
−
6.43
5.5
7.0
7.0
−
kHz
−
%
−
%
12
%
7.0
V
mA
10
15
mA
−
* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, s
N
S (X_n − X)²
n=1
N−1
http://onsemi.com
3