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FP6326A Dataheets PDF



Part Number FP6326A
Manufacturers Fiti
Logo Fiti
Description Synchronous Buck PWM
Datasheet FP6326A DatasheetFP6326A Datasheet (PDF)

fitipower integrated technology lnc. FP6326/A Synchronous Buck PWM DC-DC Controller Description The FP6326/A is designed to drive two N-channel MOSFETs in a synchronous rectified buck topology. It provides the output adjustment, internal soft-start, frequency compensation networks, monitoring and protection functions into a single package. The IC operating at fixed 300kHz or 600kHz frequency provides simple, single feedback loop, voltage mode control with fast transient response. The resulting.

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fitipower integrated technology lnc. FP6326/A Synchronous Buck PWM DC-DC Controller Description The FP6326/A is designed to drive two N-channel MOSFETs in a synchronous rectified buck topology. It provides the output adjustment, internal soft-start, frequency compensation networks, monitoring and protection functions into a single package. The IC operating at fixed 300kHz or 600kHz frequency provides simple, single feedback loop, voltage mode control with fast transient response. The resulting PWM duty ratio ranges from 0-100%. The FP6326/A features over current protection. The output current is monitored by sensing the voltage drop across the RDS-ON of the low side MOSFET which eliminates the need for a current sensing resistor. This device is available in SOP-8 package. Features ● Operates from +5V or +12V ● High Output Current ● Drives Two Low Cost N-Channel MOSFETs ● Fast Transient Response ● Simple Single-Loop Control Design ( Voltage-Mode PWM Control) ● Internal Soft-Start ● Over-Current Fault Monitor ● Over-Voltage Protection ● Under-Voltage Protection ● SOP-8 Package ● RoHS Compliant Applications ● Motherboard ● Graphic Card ● Telecomm Equipments ● High Power DC-DC Regulators ● Servers Pin Assignment SO Package (SOP-8) Ordering Information FP6326□□□□ TR: Tape / Reel G: Green Package Type SO: SOP-8 Switching Frequency Blank: 300kHz A: 600kHz Figure 1. Pin Assignment of FP6326/A FP6326/A-1.1-JUL-2009 1 Free Datasheet http://www.datasheet4u.net/ fitipower integrated technology lnc. FP6326/A Typical Application Circuit Figure 2. Typical Application Circuit of FP6326/A Functional Pin Description Pin Name BOOT UGATE GND LGATE VCC FB OCSET PHASE Pin Function This pin provides bias voltage to the high side MOSFET Driver. A bootstrap circuit may be to create a BOOT voltage suitable to drive a standard N-Channel MOSFET. Connect UGATE to the high side MOSFET gate. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the high side MOSFET has turned off. Ground. Connect LGATE to the low side MOSFET gate. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the high side MOSFET has turned off. Power Pin. Feedback Pin. The typical reference voltage is 0.8V. Shutdown Control and connect a resistance (ROCSET) for over current setting. Connect the PHASE pin to the high side MOSFET source. FP6326/A-1.1-JUL-2009 2 Free Datasheet http://www.datasheet4u.net/ fitipower integrated technology lnc. FP6326/A Absolute Maximum Ratings ● VCC to GND ------------------------------------------------------------------------------------ -0.3V to +16V ● BOOT, VBOOT-VPHASE -------------------------------------------------------------------------- -0.3V to +16V ● PHASE ------------------------------------------------------------------------------------------- -5V to +16V ● UGATE ------------------------------------------------------------------------------------------- VPHASE - 0.3V to VBOOT + 0.3V ● LGATE ------------------------------------------------------------------------------------------- -0.3V to VCC+0.3V ● FB,OCSET to GND --------------------------------------------------------------------------- -0.3V to +6V ● Continuous Power Dissipation (TA=+25°C) -------------------------------------------- +630mW ● Package Thermal Resistance, SOP-8 (θJA) -------------------------------------------- +160°C/W ● Junction Temperature ------------------------------------------------------------------------ +150°C ● Storage Temperature Range---------------------------------------------------------------- -65°C to +150°C ● Lead Temperature (Soldering, 10sec.) -------------------------------------------------- +260°C Note1:Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. Recommended Operating Conditions ● Supply Voltage, VCC ------------------------------------------------------------------------- 5V ± 5%, 12V ± 10% ● Operating Temperature Range ------------------------------------------------------------ -40°C to +85°C FP6326/A-1.1-JUL-2009 3 Free Datasheet http://www.datasheet4u.net/ fitipower integrated technology lnc. FP6326/A Block Diagram Figure 3. Block Diagram of FP6326/A FP6326/A-1.1-JUL-2009 4 Free Datasheet http://www.datasheet4u.net/ fitipower integrated technology lnc. FP6326/A Electrical Characteristics (VCC=12V, TA=25°C, unless otherwise specified) Parameter INPUT VCC Under Voltage Lockout UVLO Hysteresis Quiescent Current ERROR AMPLIFIER Feedback Voltage VFB IFB AO VFB=1V 0.784 0.8 0.1 85 0.816 V µA dB ICC VUVLO VCC rising VCC falling UGATE and LGATE open 3.7 4.1 0.45 6 15 4.5 V V mA Symbol Conditions Min Typ Max Unit FB Input Bias Current Open Loop DC Gain (Note2) OSCILLATOR Frequency Frequency Ramp Amplitude GATE DRIVERS Upper Gate Source Upper Gate Sink Lower Gate Source Lower Gate Sink Dead Time (Note2) PROTECTION FB Under-Voltage Trip FB Over-Voltage Trip OCSET Curr.


FP6326 FP6326A IS829


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