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UP3861P Datasheet(PDF) 1 Page - uPI Group Inc. |
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UP3861P Datasheet(HTML) 1 Page - uPI Group Inc. |
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1 / 17 page  uP3861P 1 uP3861P-DS-F0002, Feb. 2018 www.upi-semi.com Dual Channel Interleaved Synchronous-Rectified Buck Controller The uP3861P is a compact dual-channel synchronous rectified buck controller specifically designed to operate with single 12V supply voltage and to deliver high quality output voltage for high power application. The two channels are operated with 180 degree phase interleaved. The two- channel output voltage has power on sequence set. It adopts external compensated voltage mode control to tightly regulate the feedback voltage to internal 1V reference voltage. The switching frequency is programmable from 50KHz to 400KHz, providing an optimal level of integrating to reduce size and const of the power supply. The uP3861P integrates MOSFET drives that supply 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. Other features include under voltage lockout (UVLO), under voltage protection ,over voltage protection (OVP) and user programmable over temperature protection (OTP). With aforementioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solutions. This part is available in SOP-20L package. Dual Channel Synchronous Buck PWM Controller Operates Single with 12V Supply Voltage Wide Output Voltage Range 1V +/- 0.8% High-Side MOSFET’s R DS(ON) Sensing Programmable Frequency Range from 50 kHz to 400kHz Voltage-Mode PWM Control 0% to 90% Duty Cycle Shutdown and Soft-start Function UVP Specification is Implemented at 50% of VREF OVP Specification is Implemented at 120% of VREF Soft-Start Both Channels with 180 Degree Phase shift Integrated Boot Diode Over-Temperature Protection Sequence ON/OFF Controller SOP-20L Package RoHS Compliant and Halogen Free r e b m u N r e d r Oe g a k c a Pg n i k r a M p o T F A S P 1 6 8 3 P uL 0 2 - P O SP 1 6 8 3 P u General Description Applications Ordering Information Features ATX Power Supplies Power Supplies for Microprocessors or Subsystem Power Supplies Cable Modems, Set Top Boxes, and xDSL Modems Industrial Power Supplies; General Purpose Supplies 5V or 12V Input DC-DC Regulators Low Voltage Distributed Power Supplies Note: uPI products are compatible with the current IPC/ JEDEC J-STD-020 requirement. They are halogen-free, RoHS compliant and 100% matte tin (Sn) plating that are suitable for use in SnPb or Pb-free soldering processes. RT FB1 SS FB2 COMP2 COMP1 OCSET1 GND 1 2 3 4 5 6 7 813 14 15 16 17 18 19 20 VCC BOOT1 UG1 PH1 OCSET2 BOOT2 UG2 PH2 9 10 LG1 PGND 11 12 LG2 SEQ SOP-20L Pin Configuration |
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