RT8800/B
Frequency vs. Temperature
350
300
Load Transient Response
V
CORE
(200mV/Div)
Frequency (kHz)
250
200
150
100
50
UGATE1
(20V/Div)
UGATE2
(20V/Div)
UGATE3
(20V/Div)
phase 1, I
OUT
= 5A to 85A @SR = 93A/us)
R
RT
= 16kΩ
0
-25
-10
5
20
35
50
65
80
95
110 125
Time (2.5μs/Div)
Temperature
(°C)
Load Transient Response
V
CORE
(200mV/Div)
V
CORE
(200mV/Div)
Load Transient Response
UGATE1
(20V/Div)
UGATE2
(20V/Div)
UGATE3
(20V/Div)
phase2, I
OUT
= 5A to 85A @SR = 93A/us)
UGATE1
(20V/Div)
UGATE2
(20V/Div)
UGATE3
(20V/Div)
phase 3, I
OUT
= 5A to 85A @SR = 93A/us)
Time (2.5μs/Div)
Time (2.5μs/Div)
Over Current Protection
Short While Turn_On
Over Current Protection
Short After Turn_On
I
L1
+I
L2
(50A/Div)
I
L1
+I
L2
(50A/Div)
V
CORE
(1V/Div)
PWM1
(10V/Div)
V
COMP
(2V/Div)
Time (10ms/Div)
V
CORE
(1V/Div)
PWM1
(10V/Div)
V
COMP
(2V/Div)
Time (10ms/Div)
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12
DS8800/B-06 March 2007
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
