PL5700 32V,Synchronous,High-Efficiency,Boost PWM Controller with Programmable Output Current Limit
品牌：宝砾微 标价：面议
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产品介绍
PL5700 32V,Synchronous,High-Efficiency,Boost PWM Controller with Programmable Output Current Limit
1 Features
•2.8V to 32V Supply Voltage Range
•Integrated 2-A MOSFET Gate Drivers
•External Soft Start (SS)
•Pulse-Skip Mode under Light Loads
•Dynamical programming of Output current andvoltage using PWM signal or analog signal
•Adjustable Switching Frequency using resistor
•Frequency dithering for good EMI performance
•Cycle-by-Cycle Peak Current Limit
•Output Average Current Limiting with stable CCloop
•Over-Voltage Protection (OVP)
•Over-Temperature Protection (OTP)
•Support NTC function
•Programmable DCM and CCM
•QFN4x4-32 Package
2 Applications
•Backup Boosts
•Start-stop Boosts
•Bluetooth Speakers
•USB Power Delivery
3 Description
The PL5700 adopts constant-on-time (COT) control topology, which provides fast transient response. The 2A gate driver minimizes the power loss of the
external MOSFET while allowing the use of a wide variety of standard threshold devices. Additionally, the PL5700 uses pulse-skip mode to improve the
efficiency under light loads or no load.
The switching frequency could be set to 150kHz,300kHz based on different resistor value betweenFREQ pin and GND pin.
The device also features a programmable soft-startfunction and VADJ, IADJ pins are used to programoutput VBUS voltage and output currentlimit.Under-voltage lockout (UVLO), soft start (SS),an internal regulated supply, and slope compensation are all provided to minimize the external component count.
PL5700 provides voltage control loop, constantcurrent loop. Protection features include hiccupmode for overload protection (OLP), over voltage
protection (OVP)
4 Website：www.baitaishengshi.com
5 Typical Application Schematic
