ISL6566 Datasheet, PDF (2/28 Pages) Intersil Corporation – Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications

ISL6566
Block Diagram
ICOMP OCSET
PGOOD
ENLL
ISUM
IREF
ISEN AMP
100µA
OC
RGND
VSEN
VDIFF
VID4
VID3
VID2
VID1
VID0
VID12.5
VRM10
REF
FB
COMP
OFS
x1
x1
+1V
SOFT-START
AND
FAULT LOGIC
UVP
OVP
OVP
V_OVP
+150mV
x 0.82
DYNAMIC
VID
D/A
0.2V
CLOCK AND
SAWTOOTH
GENERATOR
∑
PWM1
∑
PWM2
∑
PWM3
E/A
OFFSET
CHANNEL
CURRENT
BALANCE
CHANNEL
CURRENT
SENSE
1
N
∑
ISEN1 ISEN2 ISEN3
0.66V
POWER-ON
RESET
GATE
SHOOT-
CONTROL THROUGH
LOGIC PROTECTION
GATE
SHOOT-
CONTROL THROUGH
LOGIC PROTECTION
CHANNEL
DETECT
GATE
SHOOT-
CONTROL THROUGH
LOGIC PROTECTION
GND
2
VCC
PVCC1
BOOT1
UGATE1
PHASE1
LGATE1
FS
PVCC2
BOOT2
UGATE2
PHASE2
LGATE2
PVCC3
BOOT3
UGATE3
PHASE3
LGATE3
FN9178.3
July 25, 2005