ISL6446A Datasheet, PDF (5/20 Pages) Intersil Corporation – Dual (180°Out-of-Phase) PWM and Linear Controller

ISL6446A
Typical Application Schematics
VOLTAGE INPUTS REQUIRED
VIN (4.5V TO 24V) = VIN1 = VIN2
VCC (5V; INTERNAL IF VIN > 5.6V)
VIN3 (≤ VCC) FOR LINEAR
TYPE-3 COMPENSATION SHOWN
C₁₀₂
VOUT1
R₁₀₂
R₁₀₁
C₁₀₁
R₁₀₃
C₁₀₃
C₂₀₂
R₁₀₀
VOUT2
R₂₀₂
R₂₀₁
C₂₀₁
R₂₀₃ C₂₀₃
R₂₀₀
TYPE-3 COMPENSATION SHOWN
VCC
R_PGOOD
C_SS1/EN1 C_SS2/EN2 R_RT
VCC
VCC
C_VCC C_VIN
VIN
OPTIONAL
CONNECTION
(FOR VIN = VCC = 5V)
R_OCSET1
VIN
VIN1 = VIN
COMP1
FB1
OCSET1
BOOT1
C_OCSET1
C_BOOT1
Q₁₀₁
C_IN1
UGATE1
PHASE1
0.9µH
L₁₀₀
VOUT1
COMP2
FB2
PGOOD
RT
SS1/EN1
SS2/EN2
ISL6446A
LGATE1
Q₁₀₂
2x680µF/18m
2x100µF
1x47µF
R_OCSET2
VIN2 = VIN
C_OUT1
OCSET2
BOOT2
UGATE2
PHASE2
LGATE2
C_OCSET2
C_BOOT2
Q₂₀₁
C_IN2
0.9µH
L₂₀₀
Q₂₀₂
LCDR
R₃₀₄
C_{301 R302}
R₃₀₃
Q₃₀₁
VOUT2
C_OUT2
2x680µF/18m
2x100µF
VIN3
C_IN3
SGND
PGND
LCFB
R₃₀₀
R₃₀₁
VOUT3
C_OUT3
FIGURE 4. ISL6446A TYPICAL APPLICATION
5
FN8384.1
November 6, 2012