IR3623MPBF_1 IRF [International Rectifier], IR3623MPBF_1 Datasheet
IR3623MPBF_1
Related parts for IR3623MPBF_1
IR3623MPBF_1 Summary of contents
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HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING Features • Dual Synchronous Controller with 180 Operation • Configurable to 2-Independent Outputs or Current Share Single Output • Output Voltage Tracking • Power ...
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ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) •Vcc Supply Voltage ...............................................… -0.5V to 16V •PWM1, PWM2 …………………….………….……….. -0.5V to 16V •PGood ………. ……………………………………….. -0.5V to 16V •Gnd to SGnd ………………………………………… +/- 0.3V •Storage Temperature Range .................................... -65°C To 150°C •Operating ...
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Recommended Operating Conditions Symbol Definition Vcc Supply Voltage Fs Operating frequency Tj Junction temperature Electrical Specifications Unless otherwise specified, these specification apply over Vcc=12V, 0 Parameter SYM Output Voltage Accuracy FB1, FB2 Voltage V FB Accuracy Supply Current V Supply ...
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Electrical Specifications Parameter SYM Error Amplifier Fb Voltage Input IFB Bias Current E/A Source/Sink I (source/Sink) Current Transconductance gm1,2 Input offset Voltage Voffset VP Voltage Range VP Track Voltage Track Range Soft Start/SD Soft Start Current ISS Shutdown Output SD ...
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Pin# Pin Name 1 PGood1 2 PGood2 3 Track2 4 V SEN2 5 OVP-Output 6 Fb2 7 Comp2 8 SS2/SD2/Mode 9 OCSet2 10 Ph_En2 11 PWM2 12 Vcc 13 V out3 14 PWM1 15 Ph_En1 16 OCSet1 17 SS1/SD1 18 ...
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Block Diagram Enable Vcc 25uA 25uA 64uA Max SS2 / SD/MODE 64uA SS1 / SD POR Track1 V P1 Fb1 Comp1 Rt Sync V 0.8V REF Track2 V P2 Fb2 Comp2 V SEN1 V SEN2 Seq Sequencing SGnd Fig. 2: ...
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TYPICAL OPERATING CHARACTERISTICS VFb1 vs Tem perature 0.804 0.802 0.800 0.798 0.796 0.794 0.792 0.790 -40 - Tem perature (C) SS1 Current vs Tem perature -15.0 -16.0 -17.0 -18.0 -19.0 -20.0 -21.0 -22.0 -23.0 -40 -15 10 ...
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TYPICAL OPERATING CHARACTERISTICS IOCSET1 vs Tem perature 23.0 22.0 21.0 20.0 19.0 18.0 17.0 -40 - Tem perature ( Tem perature 3600 3500 3400 3300 3200 3100 3000 -40 - Tem perature ...
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Circuit Description THEORY OF OPEARTION Introduction The IR3623 is a versatile device for high performance buck converters. It consists of two synchronous buck controllers which can be operated either in two independent outputs mode or in current share single output ...
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Internal Regulator IR3623 features an on-board regulator capable of sourcing current up to 200mA. This integrated regulator can be used to generate bias voltage an example of how this can be used to power the iP2005A is shown in figure ...
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Current Share Mode This feature allows to connect both outputs together to increase current handling capability of the converter to support a common load. In current sharing mode, error amplifier 1 becomes the master which regulates the common output voltage ...
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Soft-Start (cont.) During power up, the converter output starts at zero and thus the voltage about 0V. A current (64uA) injects into the Fb pin and generates a voltage about 1.6V (64ux25K) across the negative input of ...
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Output Voltage Tracking Sequencing The IR3623 can accommodate a full spectrum of user programmable tracking and sequencing options using Track, Seq, Enable and Power Good pins. Through these pins both simple voltage tracking such as that required by the DDR ...
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Fault Protection The IR3623 monitors the output voltage for over voltage protection and power good indication. It senses the R of low side MOSFET for over current protection. It also protects the output for prebias ds(on) conditions. Figure below shows ...
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Over-Current Protection The over current protection is performed by sensing current through the R DS(on) MOSFET. This method enhances the converter’s efficiency and reduce cost by eliminating a current sense resistor. As shown in figure 13, an external resistor (R ...
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Ph_En and Pre-Bias For a correct start up the driver section needs to be powered up before the PWM signal is applied. IR3623 features a dedicated pin (Ph_En) which can be used for this purposes. Figure 22 shows how this ...
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Application Information Design Example: The following example is a typical application for IR3623. The application circuit is shown in page24 max ...
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Inductor Selection The inductor is selected based on output power, operating frequency and efficiency requirements. Low inductor value causes large ripple current, resulting in the smaller size, faster response to a load transient but poor efficiency and high output noise. ...
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Feedback Compensation The IR3623 is a voltage mode controller; the control loop is a single voltage feedback path including error amplifier and error comparator. To achieve fast transient response and accurate output regulation, a compensation circuit is necessary. The goal ...
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To cancel one of the LC filter poles, place the zero before the LC filter resonant frequency pole π ...
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Based on the frequency of the zero generated by output capacitor and its ESR versus crossover frequency, the compensation type can be different. The table below compensation types and location of crossover frequency. Compensator F vs. F ESR o type ...
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Compensation for Current (slave channel) The slave error amplifier transconductance amplifier, configuration the main goal for the slave channel feedback loop is to control the inductor current to match the master channel inductor current as well provides highest bandwidth and ...
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Programming the Current-Limit The Current-Limit threshold can be set by connecting a resistor (R ) from drain of low SET side MOSFET to the OCSet pin. The resistor can be calculated by using equation (7). The R has a positive ...
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Typical Application Fig. 22: Application circuit for Single Output www.irf.com IR3623MPbF 24 ...
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Typical Application Fig. 23: Application circuit for Dual Output www.irf.com IR3623MPbF 25 25 ...
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MLPQ Package; 5x5-32 Lead Pin 1 Location Logo Part Number 3623M Date Code LYWWP (L = Assem. Location Year Work Week PbF) Part Marking IR WORLD HEADQUARTERS: This product has been designed and ...