CP494 Datasheet, PDF (10/11 Pages) Ceramate Technical – SWITCHMODE Pulse Width Modulation Control Circuit

CP494
SWITCHMODE Pulse Width Modulation Control Circuit
+V_in = 10V to 40V
Tip 32A
47
150
47k
50 ⁺
50V
12
V_CC
C_T R_T
5
6
8 11
C₁ C₂
CP494
D.T. O.C. Gnd E₁ E₂
4 13 7 9 10
0.1
Comp ³
-2
+1
V_ref ¹⁴
- ¹⁵
+ ¹⁶
0.001
47k
1.0M
5.1k
5.1k
150
1.0mH @ 2A
+V_O = 5.0 V
I_O = 1.0 A
5.1k
MR850
500 ⁺
10V
+ ₅₀
10V
0.1
Figure 21. Pulse Width Modulated Step–Down Converter
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Conditions
V_in = 8.0 V to 40 V
V_in = 12.6 V, I_O = 0.2 mA to 200 mA
V_in = 12.6 V, I_O = 200 mA
V_in = 12.6 V, R_L = 0.1 W
V_in = 12.6 V, I_O = 200 mA
Results
3.0 mV 0.01%
5.0 mV 0.02%
40 mV pp P.A.R.D.
250 mA
72%
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
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Fax:[phone]
Page 10 of 11
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Http: www.ceramate.com.tw
Rev 1.0 Apr.19,2004