1 Features
Bidirectional single Inductor Buck-Boost Controllerfor Step-Up/Step-Down DC/DC Conversion andbattery charge management
Bidirectional buck-boost operation to supportbattery charging and discharging using OTG signal
Dynamical programming of input current, Outputcurrent and Output voltage using PWM signal oranalog signal
1 Cell to 6 Cells battery charge management
2V to 32 V wide output range
Comprehensive protection features includingOutput Short Protection (OSP), Cycle-by-Cycleinput and output Peak Current Limit, thermalregulation, thermal shutdown, input UVLO, inputOVP, output OVP etc.
Adjustable Switching Frequency using resistor
Frequency dithering for good EMI performance
Integrated 2-A MOSFET Gate Drivers
Input or Output Average Current Limiting withstable CC loop
5V/55mA low I q LDO to power system 惠州MCU
Available in QFN4x4-32 Package
2 Applications
Automotive Start-Stop Systems
Backup Battery and Super capacitor Charging
Industrial PC Power Supplies
USB Power Delivery
3 Description
PL5500 is a synchronous 4-switch bidirectionalBuck-Boost controller capable of regulating theoutput voltage at above or below the input voltage.
PL5500 operates over a wide input voltage range of3.6 V to 32 V (36 V maximum) to support a variety ofapplications. PL5500 can operate at charger modefor 1, 2, 3, 4, 5 and 6 cells battery charge.
PL5500 employs Constant ON time control in buck,boost and buck-boost operation modes for superiorload and line regulation. The switching frequencycould be set to 150kHz, 300kHz, 600kHz or 1200kHzbased on different resistor value between FREQ pinand GND pin. The device also features aprogrammable soft-start function and offers all kindsof protection features including cycle-by-cycle currentlimiting, input under voltage lockout (UVLO), outputover voltage protection (OVP), input Over VoltageProtection, thermal shutdown and output shortprotection etc.
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