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ISL6558 Datasheet

  • ISL6558

  • Multi-Purpose Precision Multi-Phase PWM Controller With Opti...

  • 45.69KB

  • 16頁

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ISL6558
Electrical Specifications
PARAMETER
POWER GOOD MONITOR
Undervoltage Threshold
Undervoltage Threshold
PGOOD Low Output Voltage
PROTECTION
Overvoltage Threshold
VSEN Rising, ISL6558CB, ISL6558CR, T
A
= 0擄C to 70擄C
VSEN Rising, ISL6558IB, ISL6558IR, T
A
= -40擄C to 85擄C
Percent Overvoltage Hysteresis (GNT)
GBD = Guaranteed By Design
GNT = Guranteed Not Tesed
VSEN Falling after Overvoltage
1.12
1.085
-
1.15
1.15
2
1.2
1.2
-
V
REF
V
REF
%
VSEN Rising
VSEN Falling
I
PGOOD
= 4mA
-
-
-
0.92
0.90
0.18
-
-
0.4
V
REF
V
REF
V
Operating Conditions: V
CC
= 5V, T
A
= -40擄C to 85擄C. Unless Otherwise Specified.
(Continued)
TEST CONDITIONS
MIN
TYP
MAX
UNITS
R
FB
FB
R
OS
V
IN
ERROR
AMPLIFIER
CORRECTION
-
0.8V
+
+
-
Q1
L
01
鈭?/div>
V
ERROR1
PWM
CIRCUIT
PWM1
HIP6601B
I
L1
Q2
PHASE
鈭?/div>
DROOP
I
DROOP
-
+
CURRENT
SENSING
ISEN1
R
ISEN1
I
TOTAL
-
CURRENT
AVERAGING
ISEN2
R
ISEN2
V
IN
PHASE
V
OUT
C
OUT
R
LOAD
鈭?/div>
+
CURRENT
SENSING
-
+
鈭?/div>
V
ERROR2
PWM
CIRCUIT
PWM2
HIP6601B
Q3
L
02
CORRECTION
I
L2
Q4
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6558 VOLTAGE AND CURRENT CONTROL LOOPS CONFIGURED FOR A TWO
CHANNEL CONVERTER
7
FN9027.12
June 21, 2005

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