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CS3361YDR14G Scheda tecnica(PDF) 7 Page - ON Semiconductor

Il numero della parte CS3361YDR14G
Spiegazioni elettronici  Alternator Voltage Regulator FET Driver
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Produttore elettronici  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS3361YDR14G Scheda tecnica(HTML) 7 Page - ON Semiconductor

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CS3361
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7
REGULATION WAVEFORMS
The CS3361 utilizes proportion control to maintain
regulation. Waveforms depicting operation are shown in
Figures 4, 5 and 6, where VBAT/N is the divided down
voltage present on the Sense pin using R1 and R2 (Figure 7).
A sawtooth waveform is generated internally. The
amplitude of this waveform is listed in the electric parameter
section as proportion control. The oscillator voltage is
summed with VBAT/N, and compared with the internal
voltage regulator (VREG) in the regulation comparator
which controls the field through the output “Device Driver.”
Figure 4 shows typical steady−state operation. A 50%
duty cycle is maintained.
Figure 5 shows the effect of a drop in voltage on (VBAT/N
+ VOSC). Notice the duty cycle increase to the field drive.
Figure 6 shows the effect of an increase in voltage (above
the regulation voltage) on (VBAT/N + VOSC). Notice the
decrease in field drive.
Figure 4. 50% Duty Cycle,
Steady State
Figure 5. > 50% Duty Cycle,
Increased Load
Figure 6. < 50% Duty Cycle,
Decreased Load
VREG
VBAT/N + VOSC
VREG
VREG
VBAT/N + VOSC
Field Driver On
Field Driver On
Field Driver On
VBAT/N + VOSC
Figure 7. Typical Application DIagram
D1
C3
BATTERY
Q1
Logic level
N Channel
MTB20N20E
POWER
GROUND
R4
18 k
Ω
C1
0.1
μF
50 k
Ω
0.047
μF
C4
0.022
μF
R6
20 k
Ω
R9
2.4 k
Ω
GND
Driver
SC
STATOR
STATOR
RECTIFIER
S
A
F
I
FIELD
Lamp Indicator
R10
510
Ω
IGNITION
SWITCH
R7
MPSA13
*Note: C2 optional for reduced jitter.
LAMP
VCC
Sense
OSC
IGN
*C2
10
μF
R1
100 k
Ω
R5
10 k
Ω
R3
250
Ω
10
Ω
MR2502
MR2502
MR2502
MR2502
MR2502
MR2502
MR2502
R2


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