参数资料
型号: IR3092
厂商: International Rectifier
英文描述: 2 PHASE OPTERON, ATHLON, OR VR10.X CONTROL IC
中文描述: 2相皓龙,速龙,或控制IC的VR10.X
文件页数: 16/37页
文件大小: 619K
代理商: IR3092
IR3092
Page 16 of 37
06/25/04
"FAST" VDAC
TO FAULT
2.6V FLOAT VOLTAGE
60K
SHOWN DEFAULT
TO VR10 WITH
VID_SEL GROUNDED
+
-
IROSC
DAC BUFFER
4.9V
110K
-
+
18uA
1.2V
-
+
-
+
1.5V
3.4V
0.6V
VID0
VID1
VID2
VID3
VID4
VID_SEL
VID5
VDAC
VOSNS-
H=ATHLON
"SLOW" VDAC
DAC DEFAULTS
TO VR10 WITH
VID_SEL GROUNDED
5V
3.3V
VID INPUT
COMPARATORS
(1 OF 6 SHOWN)
H=HAMMER
VID=11111X FAULT
BLANKING, 3.3us
DIGITAL TO ANALOG
CONVERTER
A
H
Figure 7
– VID Control Block Diagram
VID = 11111X Fault
VID codes of 111111 and 111110 will set the fault latch and disable the Error Amplifier.
Slew Rate Programming Capacitor C
DAC
and Resistor R
DAC
VDAC sink current I
SINK
and source current I
SOURCE
are determined by R
ROSC,
and their value can be found using the
curve in the Typical Operating Characteristics. The slew rate of VDAC down-slope SR
DOWN
can be programmed by the
external capacitor C
DAC
as defined in Equation (1) and shown in Figure 6. Resistor R
DAC
is used to compensate VDAC
circuit and is determined by Equation (2). The slew rate of VDAC up-slope SR
UP
is proportional to the down-slope slew
rate SR
DOWN
and is given by Equation (3).
I
C
DOWN
SINK
DAC
SR
(1)
2
15
10
2
5
DAC
DAC
C
R
(2)
DAC
SOURCE
C
UP
I
SR
(3)
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