DatasheetsPDF.com

IR3621 Dataheets PDF



Part Number IR3621
Manufacturers International Rectifier
Logo International Rectifier
Description 2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER
Datasheet IR3621 DatasheetIR3621 Datasheet (PDF)

www.DataSheet4U.com Data Sheet No.PD60231 revA IR3621 & (PbF) 2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP FEATURES Dual Synchronous Controller with 180! Out of Phase Operation Configurable to 2-Independent Outputs or Current Share Single Output Voltage Mode Control Current Sharing Using Inductor's DCR Selectable Hiccup or Latched Current Limit using MOSFET's RDS(on) sensing Latched Over-Voltage Protection Pre-Bias Start Up Programmable Switchi.

  IR3621   IR3621



Document
www.DataSheet4U.com Data Sheet No.PD60231 revA IR3621 & (PbF) 2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP FEATURES Dual Synchronous Controller with 180! Out of Phase Operation Configurable to 2-Independent Outputs or Current Share Single Output Voltage Mode Control Current Sharing Using Inductor's DCR Selectable Hiccup or Latched Current Limit using MOSFET's RDS(on) sensing Latched Over-Voltage Protection Pre-Bias Start Up Programmable Switching Frequency up to 500KHz Two Independent Soft-Starts/Shutdowns Precision Reference Voltage 0.8V Power Good Output External Frequency Synchronization Thermal Protection DESCRIPTION The IR3621 IC combines a dual synchronous buck controller and drivers, providing a cost-effective, high performance and flexible solution. The IR3621 operates in 2-Phase mode to produce either 2-independent output voltages or current share single output for high current application. The 180! out-of-phase operation allows the reduction of input and output capacitance. Other key features include two independently programmable soft-start functions to allow system level sequencing of output voltages in various configurations. The pre-bias protection feature prevents the discharge of the output voltage and possible damage to the load during start-up when a preexisting voltage is present at the output. Programmable switching frequency up to 500KHz per phase allows flexibility to tune the operation of the IC to meet system level requirements, and synchronization allows the simplification of system level filter design. Protection features such as selectable hiccup or latched current limit, and under voltage lock-out are provided to give required system level security in the event of a fault condition. APPLICATIONS Embedded Networking & Telecom Systems Distributed Point-of-Load Power Architectures 2-Phase Power Supply Graphics Card DDR Memory Applications Vin Vin Rt Comp1 HDrv1 OCSet1 LDrv1 PGnd1 Rt Comp1 HDrv1 OCSet1 LDrv1 PGnd1 Vout1 Comp2 SS1 / SD SS2 / SD Gnd IR3621 HDrv2 OCSet2 LDrv2 PGnd2 Vin Vout Comp2 SS1 / SD SS2 / SD IR3621 HDrv2 OCSet2 LDrv2 Vin Vout2 Gnd PGnd2 Current share, single output configuration 2-independent output voltage configuration Figure 1 - Typical application of IR3621 in current share single output and 2-independent output voltage configuration ORDERING INFORMATION PKG DESIG M M F F PART NUMBER IR3621M IR3621MTR IR3621F IR3621FTR LEADFREE PART NUMBER IR3621MPbF IR3621MTRPbF N/A N/A PIN COUNT 32 32 28 28 www.irf.com PARTS PER TUBE 73 -----50 -----PARTS PER REEL -----6000 -----2500 T&R Orientation Fig A 1 IR3621 & (PbF) ABSOLUTE MAXIMUM RATINGS Vcc, VCL Supply Voltage ........................................... VcH1 and VcH2 Supply Voltage ................................ PGOOD.................................................................... Storage Temperature Range ...................................... Junction Temperature Range ....


IPS1052GPBF IR3621 IR3621PBF


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)