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IR3621 Datasheet(PDF) 6 Page - International Rectifier

Part No. IR3621
Description  2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP
Download  29 Pages
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
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IR3621 Datasheet(HTML) 6 Page - International Rectifier

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IR3621&(PbF)
www.irf.com
Figure 3 - IR3621Block Diagram
BLOCK DIAGRAM
PBias2
Bias
Generator
LDrv2
Two Phase
Oscillator
0.8V
3V
Ramp1
Sync
Gnd
HDrv2
VcH2
SS1 / SD
Comp2
Error Amp2
PWM Comp2
POR
VOUT3
28uA
Reset Dom
LDrv1
VCL
HDrv1
VcH1
Fb1
Comp1
Error Amp1
PWM Comp1
Reset Dom
Set1
Set2
Ramp2
64uA
Max
UVLO
VcH2
VcH1
Fb2
PGnd2
Vcc
Rt
0.8V
SS2 / SD
VP2
VREF
PGood / OVP
PGood
R
S
Q
Q
S
R
VSEN1
VSEN2
OCSet2
OVP
HDrv OFF / LDrv ON
Thermal
Shutdown
PGnd1
OCSet1
28uA
64uA
Hiccup
Hiccup
Control
SS1
SS2
Mode
Regulator
Mode
Control
POR
Mode
0.8V
SS2
Mode
20uA
20uA
POR
0.8V
PBias1
0.3V
SS1
Q
R
S
PBias1
SS1
SS2
3uA
3uA
POR
0.3V
SS2
Q
R
S
POR


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