ISL6308 Datasheet, PDF (26/27 Pages) Intersil Corporation – Three-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers

ISL6308
+5V
C_HF0
R_OFST
R_FS
R_REF
C_REF
+12V
R₁
VDIFF
VSEN
RGND
3PH
2PH
VCC
C₁
FB
LOCATE CLOSE TO IC
(MINIMIZE CONNECTION PATH)
C₂
R₂
COMP
PVCC1
BOOT1
UGATE1
C_HF01
+12V
C_BOOT1
C_HF1
KEY
HEAVY TRACE ON CIRCUIT PLANE LAYER
ISLAND ON POWER PLANE LAYER
ISLAND ON CIRCUIT PLANE LAYER
VIA CONNECTION TO GROUND PLANE
C_BIN1
LOCATE NEAR SWITCHING TRANSISTORS;
(MINIMIZE CONNECTION PATH)
PHASE1
ISEN1
LGATE1
R_ISEN1
L_OUT1
OFST
FS
DAC
ISL6308
PVCC2
C_HF02
BOOT2
UGATE2
C_BOOT2
+12V
C_HF2
C_BIN2
REF
REF1
REF0
OVP
PGOOD
GND
PHASE2
ISEN2
LGATE2
R_ISEN2
L_OUT2
PVCC3
BOOT3
UGATE3
C_HF03
C_BOOT3
+12V
C_BIN3
C_HF3
ENLL
IREF
DROOP
OCSET ICOMP
ISUM
R_COMP
R_OCSET
C_COMP
PHASE3
ISEN3
LGATE3
C_SUM
R_ISEN3
R_S
R_S
R_S
L_OUT3
C_BOUT (C_HFOUT)
LOAD
LOCATE NEAR LOAD;
(MINIMIZE CONNECTION PATH)
FIGURE 27. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS
26
FN9208.2
October 19, 2005