CS2841B Datasheet, PDF (5/10 Pages) Cherry Semiconductor Corporation – Automotive Current Mode PWM Control Circuit

CS2841B
TYPICAL PERFORMANCE CHARACTERISTICS
900
800
R_T = 680 W
700
600
500 _{RT = 1.5 kW}
400
300
200
R_T = 10 kW
100
.0005
.001 .002 .003 .005 .01
C_T (mF)
.02 .03 .04 .05
Figure 2. Oscillator Frequency vs. C_T
100
90
80
70
60
50
40
30
20
10
R_T (W)
Figure 3. Oscillator Duty Cycle vs. R_T
4.7 kW
1.0 kW
Error Amp
Adjust
4.7 kW
2N2222
100 kW
5.0 kW
Sense
Adjust
R_T
COMP
V_REF
V_FB
V_CC
CS2841B
Sense
V_OUT
OSC
GND
A
0.1 mF
0.1 mF
1.0 kW
1.0 W
C_T
Figure 4. Test Circuit
V_REF
V_CC
V_OUT
GND
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