PL3900 100V Multi-Phase Synchronous Buck/Boost Controller
關(guān)鍵詞： PL3900 多相同步降壓/升壓控制器 多相操作 寬輸入電壓范圍 同步整流
PL3900 100V Multi-Phase Synchronous Buck/Boost Controller
1 Features
?2-Phase Operation Reduces Required Input and
Output Capacitance and Power Supply Induced
Noise
?Synchronous Operation for Highest Efficiency and
Reduced Heat Dissipation
?Wide VIN Range:4.5V to 56V (Sense Pin 60V Abs
Max ) in Boost mode and Operates Down to 2.5V
After Start-Up ，4.5V to 96V (Vbias Pin 100V Abs
Max ) in Buck mode
?Output Voltage Up to 96V(Boost mode) and
56V(Buck mode)
?±1% 1.2V Reference Voltage
?RSENSE or Inductor DCR Current Sensing
?CV/CC Mode control (Constant voltage and
constant current)
?Phase-Lockable Frequency (75kHz to 850kHz).
?Programmable Fixed Frequency (50kHz to 900kHz)
?Power Good Output Voltage Monitor
?Internal LDO Powers Gate Drive from VBIAS or
EXTVCC
?Thermally Enhanced Low Profile 28-Pin 4mm ×
5mm QFN Package
2 Applications
?consumer
?Industrial
?Automotive
?Medical
3 Description
The PL3900 is a high performance Multi-Phase single output synchronous buck/boost converter controller that drives two N-channel power MOSFET stages out-of-phase. Multiphase operation reduces input and output capacitor requirements and allows the use of smaller inductors than the single-phase equivalent.Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, enabling high power boost applications.
A 4.5V to 56V (boost mode) and 4.5V to 96V (buck mode) input supply range encompasses a wide range of system architectures and battery chemistries.
When biased from the output of the converter or another auxiliary supply, the PL3900 can operate from an input supply as low as 2.5V after start-up. The
operating frequency can be set for a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL. Multi-Phase operation allows the
PL3900 to be configured for 2-, 3-, 4-, 6- and 12-phase operation.
The SS pin ramps the output voltage during start-up.
The PLLIN/MODE pin selects Burst Mode operation,pulse-skipping mode or forced continuous mode atlight loads.
4 Website：www.baitaishengshi.com
5Typical Application Schematic
