TL494_15 Datasheet, PDF (5/33 Pages) Unisonic Technologies – VOLTAGE MODE PWM CONTROL CIRCUIT

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TL494
SLVS074G – JANUARY 1983 – REVISED JANUARY 2015
7.5 Electrical Characteristics, Reference Section
over recommended operating free-air temperature range, V_CC = 15 V, f = 10 kHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS⁽¹⁾
TL494C, TL494I
MIN TYP⁽²⁾ MAX
Output voltage (REF)
Input regulation
Output regulation
Output voltage change with temperature
Short-circuit output current⁽³⁾
I_O = 1 mA
V_CC = 7 V to 40 V
I_O = 1 mA to 10 mA
ΔT_A = MIN to MAX
REF = 0 V
4.75
5 5.25
2
25
1
15
2
10
25
(1) For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
(2) All typical values, except for parameter changes with temperature, are at T_A = 25°C.
(3) Duration of short circuit should not exceed one second.
UNIT
V
mV
mV
mV/V
mA
7.6 Electrical Characteristics, Oscillator Section
C_T = 0.01 μF, R_T = 12 kΩ (see Figure 5)
PARAMETER
TEST CONDITIONS⁽¹⁾
TL494C, TL494I
MIN TYP⁽²⁾ MAX
Frequency
Standard deviation of frequency⁽³⁾
Frequency change with voltage
Frequency change with temperature⁽⁴⁾
All values of V_CC, C_T, R_T, and T_A constant
V_CC = 7 V to 40 V, T_A = 25°C
ΔT_A = MIN to MAX
10
100
1
10
(1) For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
(2) All typical values, except for parameter changes with temperature, are at T_A = 25°C.
(3) Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
Ã¥ ^{( ) N}
2
x_n - X
s = ⁿ⁼¹
N-1
(4) Temperature coefficient of timing capacitor and timing resistor are not taken into account.
UNIT
kHz
Hz/kHz
Hz/kHz
Hz/kHz
7.7 Electrical Characteristics, Error-Amplifier Section
See Figure 6
PARAMETER
TEST CONDITIONS
Input offset voltage
Input offset current
Input bias current
Common-mode input voltage range
Open-loop voltage amplification
Unity-gain bandwidth
Common-mode rejection ratio
Output sink current (FEEDBACK)
Output source current (FEEDBACK)
V_O (FEEDBACK) = 2.5 V
V_O (FEEDBACK) = 2.5 V
V_O (FEEDBACK) = 2.5 V
V_CC = 7 V to 40 V
ΔV_O = 3 V, V_O = 0.5 V to 3.5 V, R_L = 2 kΩ
V_O = 0.5 V to 3.5 V, R_L = 2 kΩ
ΔV_O = 40 V, T_A = 25°C
V_ID = –15 mV to –5 V, V (FEEDBACK) = 0.7 V
V_ID = 15 mV to 5 V, V (FEEDBACK) = 3.5 V
(1) All typical values, except for parameter changes with temperature, are at T_A = 25°C.
TL494C, TL494I
MIN TYP⁽¹⁾
2
25
0.2
–0.3 to V_CC – 2
70
95
800
65
80
0.3 0.7
–2
MAX
10
250
1
UNIT
mV
nA
μA
V
dB
kHz
dB
mA
mA
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