RT9245B Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT9245B Datasheet PDF : 23 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
RRT (kkWΩ)
PWM
Relationship Between Inductor
Current and VADJ
CH1:(5V/Div)
CH2:(5V/Div)
VSS
VADJ
IL
CH3:(50mV/Div)
CH4:(20A/Div)
Time (25ms/Div)
VSS
PWM
Power-On @ IOUT = 60A
CH1:(5V/Div)
CH2:(5V/Div)
UGATE
LGATE
CH3:(20V/Div)
CH4:(10V/Div)
Time (10ms/Div)
RT9245B
70
RRT = 16kΩ
60
PWM vs. VCOMP
50
40
30
20
10
0
0.5
1
1.5
2
2.5
3
3.5
VCOMP (V)
Power-Off @ IOUT = 60A
PWM
UGATE
LGATE
VCOMP
CH1:(5V/Div)
CH2:(20V/Div)
CH3:(10V/Div)
CH4:(1V/Div)
Time (10µs/Div)
Ripple
VCORE
(5mV/Div)
L = 0.3µH, C = 5600µF
Time (2.5µs/Div)
DS9245B-02 March 2007
www.richtek.com
9
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