isl8120 Intersil Corporation, isl8120 Datasheet - Page 21

• Manufacturer Part Number: isl8120
• Description: Dual/n-phase Buck Pwm Controller With Integrated Drivers
• Manufacturer: Intersil Corporation

CH2 UG(2
CH1 UG (2
CH2 UG (1
CLKOUT (1
CH1 UG (1
CH2 UG (2
CH1 UG (1
CH2 UG (1
CH1 UG (2
CLKOUT (1
VCC
ND
700mV
ND
ST
ST
ND
ST
ND
ST
ST
IC, OFF, EN2/FF2 = 0)
ST
IC)
IC)
IC)
IC)
IC)
IC)
IC)
IC)
IC)
VSEN2- VSEN2+
D
D
21
AMP2
DIFF
FIGURE 3. SIMPLIFIED RELATIVE PHASES CONTROL
120°
90°
90°
120°
VMON2
PWM CONTROL
D
D
180°
240°
CHANNEL 1
3
-PHASE TIMING DIAGRAM (MODE 6)
BLOCK
V
4 PHASE TIMING DIAGRAM (MODE 7A)
REF2
= V
REF
COMP2
UV/OV
RELATIVE PHASES CONTROL
1-D
1-D
D
180°
D
ISL8120
CLOCK GENERATOR
FB2
AND
1-D
ERROR
AMP2
D
COMP2
50%
PWM CONTROL
CHANNEL 2
BLOCK
50%
CLKOUT/REFIN
March 28, 2008
FN6641.0