參數(shù)資料
型號: ISL6244HRZ-T
廠商: INTERSIL CORP
元件分類: 穩(wěn)壓器
英文描述: Multi-Phase PWM Controller
中文描述: SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC32
封裝: 5 X 5 MM, LEAD FREE, PLASTIC, MO-220-VHHD, QFN-32
文件頁數(shù): 9/25頁
文件大?。?/td> 845K
代理商: ISL6244HRZ-T
9
FN9106.3
December 28, 2004
Theory of Operation
Multi-Phase Power Conversion
Microprocessor load current profiles have changed to the
point where the multi-phase power conversion advantage is
pronounced. The technical challenges associated with
producing a single-phase converter which is both cost-
effective and thermally viable have forced a change to the
cost-saving approach of multi-phase. The ISL6244 controller
helps reduce the complexity of implementation by integrating
vital functions and requiring minimal output components.
The block diagram in Figure 12 provides a top level view of
multi-phase power conversion using the ISL6244 controller.
diff
VSEN
IOUT
1/N
CURRENT
SENSE
&
PHASE
DETECT
I3
I2
I1
+
2.2V
OV
85
μ
A
+
+
-
N PHASES
+
I4
+
+
-
+
+
x 0.2
100
μ
A
OFS
VID4
VID3
VID2
VID1
VID0
FB
DYNAMIC
VID
DAC
e/a
VDIFF
RGND
COMP
ISEN1
ISEN2
ISEN3
PWM1
PWM2
PWM3
VFF
EN
1.23V
FS
PGOOD
VCC
POR
AND
SOFT START
OSCILLATOR
AND
SAWTOOTH
+
+
-
+
+
-
6V
PWM4
ISEN4
UV
+
-
GND
OC
AVERAGE
FIGURE 12. BLOCK DIAGRAM
3
ISL6244
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ISL6244 Multi-Phase PWM Controller(多相PWM控制器)
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