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TL594 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. TL594
Description  Precision Switchmode Pulse Width Modulation Control Circuit
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

TL594 Datasheet(HTML) 3 Page - ON Semiconductor

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TL594
http://onsemi.com
3
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
PWM COMPARATOR SECTION (Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle)
VTH
3.6
4.5
V
Input Sink Current (VPin 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
mA
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
45
48
45
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 mF, RT = 30 kW)
(CT = 0.01 mF, RT = 12 kW, TA = 25°C)
(CT = 0.01 mF, RT = 12 kW, TA = Tlow to Thigh)
fosc
9.2
9.0
40
10
10.8
12
kHz
Standard Deviation of Frequency* (CT = 0.001 mF, RT = 30 kW)
σfosc
1.5
%
Frequency Change with Voltage (VCC = 7.0 V to 40 V, TA = 25°C)
Dfosc (DV)
0.2
1.0
%
Frequency Change with Temperature
(
DTA = Tlow to Thigh, CT = 0.01 mF, RT = 12 kW)
Dfosc (DT)
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
V
Hysteresis
TL594C,I
TL594M
VH
100
50
150
150
300
300
mV
TOTAL DEVICE
Standby Supply Current (Pin 6 at Vref, All other inputs and outputs open)
(VCC = 15 V)
(VCC = 40 V)
ICC
8.0
8.0
15
18
mA
Average Supply Current (VPin 4 = 2.0 V, CT = 0.01 mF, RT = 12 kW,
VCC = 15 V, See Figure 11)
11
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


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