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TL494CD Datasheet(PDF) 9 Page - Motorola, Inc

Part # TL494CD
Description  SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

TL494CD Datasheet(HTML) 9 Page - Motorola, Inc

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Figure 18. Slaving Two or More Control Circuits
Figure 19. Operation with Vin > 40 V Using
External Zener
Figure 20. Pulse Width Modulated Push–Pull Converter
RT
CT
6
5
Vref
RT
CT
Master
Vref
Slave
(Additional
Circuits)
RT
CT
5
6
Vin > 40V
RS
VZ = 39V
1N975A
VCC
5.0V
Ref
12
270
Gnd
7
+Vin = 8.0V to 20V
1
2
3
15
16
+
–
–
+
Comp
OC VREF DT
CT
RT Gnd E1
E2
13
14
45679
10
1M
33k
0.01 0.01
VCC
C1
C2
8
11
47
47
10
+
10k
4.7k
4.7k
15k
Tip
32
+
T1
1N4934
L1
1N4934
240
+
50
35V
4.7k
1.0
22
k
+
+VO = 28 V
IO = 0.2 A
12
L1 – 3.5 mH @ 0.3 A
T1 – Primary: 20T C.T. #28 AWG
T1 – Secondary: 12OT C.T. #36 AWG
T1 – Core: Ferroxcube 1408P–L00–3CB
All capacitors in
µF
TL494
0.001
50
35V
50
25V
Tip
32
TL494
9
MOTOROLA ANALOG IC DEVICE DATA
Test
Conditions
Results
Line Regulation
Vin = 10 V to 40 V
14 mV 0.28%
Load Regulation
Vin = 28 V, IO = 1.0 mA to 1.0 A
3.0 mV 0.06%
Output Ripple
Vin = 28 V, IO = 1.0 A
65 mV pp P.A.R.D.
Short Circuit Current
Vin = 28 V, RL = 0.1 Ω
1.6 A
Efficiency
Vin = 28 V, IO = 1.0 A
71%


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