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FP6321A

Fiti
Part Number FP6321A
Manufacturer Fiti
Description Sunchronous Buck PWM DC-DC Controller
Published Apr 13, 2015
Detailed Description fitipower integrated technology lnc. FP6321A Synchronous Buck PWM DC-DC Controller Description The FP6321A is designe...
Datasheet PDF File FP6321A PDF File

FP6321A
FP6321A

Overview
fitipower integrated technology lnc.
FP6321A Synchronous Buck PWM DC-DC Controller Description The FP6321A 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 frequency provides simple, single feedback loop, voltage mode control with fast transient response.
The resulting PWM duty ratio ranges from 0-100%.
The FP6321A 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.
Pin Assignment SO Package (SOP-8) Features ● Operates from +5V or +12V ● 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 Ordering Information FP6321A□□□ TR: Tape / Reel P: Green G: Green Figure 1.
Pin Assignment of FP6321A Package Type SO: SOP-8 FP6321A-1.
1-FEB -2010 1 fitipower integrated technology lnc.
Typical Application Circuit FP6321A Figure 2.
Typical Application Circuit of FP6321A 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 t...


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