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| ISL6446IAZ-TK Datasheet, PDF (4/19 Pages) Intersil Corporation – Dual (180° Out-of-Phase) PWM and Linear Controller | |||
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Block Diagram
REFERENCE
BIAS CURRENT
30µA 100µA 0.6V
ISL6446
VCC
VCC
POWER ON
RESET
AND CONTROL
VIN
5V LINEAR
REGULATOR
COMP1
FB1
SS1/EN1
SS2/EN2
FB2
COMP2
0.6V
VCC5
VCC5
30µA
30µA
0.6V
FAULT1
UVP1
OVP1
PG1
EN1
SS1
STARTUP
SS1 EN1
SS2 EN2
FAULT2
UVP2
OVP2
PG2
EN2
SS2
RT
PG1
PG2
PGOOD
PG3
PWM1
RAMP1
0°
CLOCK AND
SAWTOOTH
GENERATOR
RAMP2
180°
PWM2
110µA
VCC
UVP1
OVP1
PG1
EN1
OUTPUT1
DRIVERS
GATE CONTROL
LOGIC VCC
DEAD-TIME
CONTROL
OVERCURRENT
PGND
OCSET1
BOOT1
UGATE1
PHASE1
LGATE1
110µA
VCC
UVP2
OVP2
PG2
EN2
OUTPUT2
DRIVERS
GATE CONTROL
LOGIC VCC
DEAD-TIME
CONTROL
OVERCURRENT
PGND
FAULT3
PG3 LCFB
OCSET2
BOOT2
UGATE2
PHASE2
LGATE2
0.6V
gm*VE
LCFB
LCDR
SGND
FIGURE 3. BLOCK DIAGRAM
PGND
4
FN7944.1
October 15, 2013
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