TL494 Datasheet, PDF (10/12 Pages) Motorola, Inc – SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

TL494
Figure 21. Pulse Width Modulated Step–Down Converter
+Vin = 10V to 40V
Tip 32A
47
150
47k
50 ⁺
50V
12
VCC
CT RT
5
6
8 11
C1 C2
TL494
D.T. O.C. Gnd E1 E2
4 13 7 9 10
0.1
Comp ³
–2
+1
Vref ¹⁴
– ¹⁵
+ ¹⁶
0.001
47k
1.0M
5.1k
5.1k
150
1.0mH @ 2A
+VO = 5.0 V
IO = 1.0 A
5.1k
MR850
500 ⁺
10V
+ ₅₀
10V
0.1
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Conditions
Vin = 8.0 V to 40 V
Vin = 12.6 V, IO = 0.2 mA to 200 mA
Vin = 12.6 V, IO = 200 mA
Vin = 12.6 V, RL = 0.1 Ω
Vin = 12.6 V, IO = 200 mA
Results
3.0 mV 0.01%
5.0 mV 0.02%
40 mV pp P.A.R.D.
250 mA
72%
10
MOTOROLA ANALOG IC DEVICE DATA