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RT9245C 데이터 시트보기 (PDF) - Richtek Technology
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RT9245C
Multi-Phase PWM Controller for CPU Core Power Supply
Richtek Technology
RT9245C Datasheet PDF : 25 Pages
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Typical Operating Characteristics
Adjustable Frequency
700
600
500
400
300
200
100
0
0
10 20 30 40 50 60 70
R
RT
(kW
Ω
)
PWM
Relationship Between Inductor
Current and V
ADJ
CH1:(5V/Div)
CH2:(5V/Div)
V
SS
V
ADJ
I
L
CH3:(50mV/Div)
CH4:(20A/Div)
Time (25ms/Div)
V
SS
PWM
Power-On @ I
OUT
= 60A
CH1:(5V/Div)
CH2:(5V/Div)
UGATE
LGATE
CH3:(20V/Div)
CH4:(10V/Div)
Time (10ms/Div)
RT9245C
70
R
RT
= 16k
Ω
60
PWM vs. V
COMP
50
40
30
20
10
0
0.5
1
1.5
2
2.5
3
3.5
V
COMP
(V)
Power-Off @ I
OUT
= 60A
PWM
UGATE
LGATE
V
COMP
CH1:(5V/Div)
CH2:(20V/Div)
CH3:(10V/Div)
CH4:(1V/Div)
Time (10
μ
s/Div)
Ripple
V
CORE
(5mV/Div)
L = 0.3
μ
H, C = 5600
μ
F
Time (2.5
μ
s/Div)
DS9245C-02 March 2007
www.richtek.com
11
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