ISL8120 Datasheet, PDF (22/35 Pages) Intersil Corporation – Dual/n-Phase Buck PWM Controller with Integrated Drivers

ISL8120
CH1 UG (1^ST IC)
D
CH2 UG (1^ST IC)
CLKOUT (1^ST IC)
CH1 UG (2^ND IC)
CH2 UG (2^ND IC)
CH1 UG (1^ST IC)
D
CH2 UG (1^ST IC)
CLKOUT (1^ST IC)
CH1 UG (2^ND IC)
CH2 UG(2^ND IC, OFF, EN2/FF2 = 0)
1-D
180°
D
90°
90°
D
180°
D
4 PHASE TIMING DIAGRAM (MODE 7A)
50%
1-D
240°
D
120°
120°
D
50%
1-D
3-PHASE TIMING DIAGRAM (MODE 6)
VCC
VSEN2- VSEN2+ _VMON2
FB2
COMP2
CLKOUT/REFIN
700mV
DIFF
AMP2
UV/OV
COMP2
V_REF2 = V_REF
ERROR
AMP2
CLOCK GENERATOR
AND
RELATIVE PHASES CONTROL
CHANNEL 1
PWM CONTROL
BLOCK
CHANNEL 2
PWM CONTROL
BLOCK
FIGURE 3. SIMPLIFIED RELATIVE PHASES CONTROL
22
March 20, 2009
FN6641.0