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CS5127 Datasheet(PDF) 19 Page - Cherry Semiconductor Corporation

Part # CS5127
Description  Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable
PDF  24 Pages
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Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS5127 Datasheet(HTML) 19 Page - Cherry Semiconductor Corporation

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95
90
80
75
70
20
22
26
28
30
34
RT (k
W)
36
40
85
24
32
38
150pF
390pF
680pF
1.5nF
3.3nF
Figure 27: Oscillator Duty Cycle vs CT, RT (VIN = 12V, T = 25C).
91.5
91.0
89.5
89.0
88.5
010
30
40
50
70
Temperature (C)
90.5
20
60
90.0
1.65
1.55
1.40
1.30
1.25
010
30
40
50
70
Temperature (C)
20
60
1.60
1.50
1.45
1.35
1.20
Figure 25: Oscillator Maximum Duty Cycle vs Temperature.
Figure 28: SYNC Threshold vs Temperature.
Typical Performance Characteristics: continued
19
210
208
206
204
202
200
0
10
20
30
40
50
Temperature (C)
60
70
Figure 26: Oscillator Frequency vs Temperature. CT = 330pF, RT =27k
1.2785
1.2775
1.2765
1.2760
010
30
40
50
70
Temperature (C)
20
60
1.2780
1.2770
1.2755
Figure 30: VFB Reference Voltage vs Temperature.
170
160
145
140
010
30
40
50
70
Temperature (C)
20
60
165
155
150
Figure 29: SYNC Input Current vs Temperature (VSYNC = 2.4V).



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