1 Features
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Bidirectional single Inductor Buck-Boost Controller
for Step-Up/Step-Down DC/DC Conversion and
battery charge management
Bidirectional buck-boost operation to support battery
charging and discharging using OTG signal
Dynamical programming of input current, Output
current and Output voltage using PWM signal or
analog signal
1 Cell to 6 Cells battery charge management
2V to 32 V wide output range
Comprehensive protection features including Output
Short Protection
(OSP), Cycle-by-Cycle input and
output Peak Current Limit, thermal regulation,
thermal shutdown, input UVLO, input OVP, output
OVPetc.
Adjustable Switching Frequency using resistor
Frequency dithering for good EMI performance
Integrated 2-A MOSFET Gate Drivers
Input or Output Average Current Limiting with stable
CCloop
Available in QFN4x4-32 Package
2 Applications
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Automotive Start-Stop Systems
Backup Battery and Super capacitor Charging
Industrial PC Power Supplies
USB Power Delivery
4 Typical Application Schematic
3 Description
PL5500 is a synchronous 4-switch bidirectional
Buck-Boost controller capable of regulating the
output voltage at above or below the input voltage.
PL5500 operates over a wide input voltage range of
3.6 V to 32 V (36 V maximum) to support a variety of
applications. PL5500 can operate at charger mode
for 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 superior
load and line regulation. The switching frequency
could be set to 150kHz, 300kHz, 600kHz or 1200kHz
based on different resistor value between FREQ pin
and GND pin. The device also features a
programmable soft-start function and offers all kinds
of protection features including cycle-by-cycle current
limiting, input under voltage lockout (UVLO), output
over voltage protection (OVP), input Over Voltage
Protection, thermal shutdown and output short
protection etc.
VADJ, IADJ pins are used to program output VBUS
voltage and output current limit at battery discharging
mode when OTG is high, which makes PL5500 an
excellent option for USB Power Delivery (PD)
application. PL5500 provides voltage control loop,
constant current loop, thermal regulation loop, battery
temperature sensing, which makes it a perfect
solution for batter charge management
