The TPS2586x-Q1 is an integrated USB charging port solution, which includes a synchronous, high efficiency DC/DC converter and integrated detection and control for implementing USB Battery Charging 1.2 and Type-C ports.The TPS2586x-Q1 is a family of
highly-integrated USB charging controller for Type-C and Type-A dual ports
application.The device integrates a monolithic,
synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs
and two USB current-limit switches with charging port auto-detection. The
TPS2586x-Q1 offers a compact solution with excellent load and line regulation over a
wide input supply range. The synchronous buck regulator operates with peak-current
mode control and is internally compensated to simplify the design. A resistor on the
FREQ pin sets the switching frequency between 200 kHz and 3 MHz. Operating below 400
kHz results in better system efficiency and operation above 2.1 MHz avoids the AM
radio bands and allows for use of a smaller inductor.The TPS2586x-Q1 integrates standard
USB Type-C port
controller functionality including Configuration Channel (CC) logic for 3-A and
1.5-A current advertisement. Battery Charging (Rev. 1.2) integration provides the
required electrical signatures necessary for non-Type-C, legacy USB devices which
use USB data line signaling to determine USB port current sourcing capabilities. The
TPS2586x-Q1 also has integrated VCONN power that can meet the USB3.1 power
requirement. The part is especially suitable for dual-port application due to the
high system integration and small footprint.Since the TPS2586x-Q1 supports
intelligent thermal regulation, the output current and voltage can be regulated
according to the temperature sensing through the TS pin. The device needs to connect
a NTC thermistor on the TS pin to monitor the ambient temperature or PCB board
temperature, depending on where the NTC thermistor is put in the USB charging module
or PCB board. Select a different NTC thermistor and bottom-side series resistor can
change the temperature for load shedding.The TPS2586x-Q1 have four selectable
USB output voltage settings: 5.1 V, 5.17 V, 5.3 V, and 5.4 V. The TPS2586x-Q1
integrates a precision current sense amplifier for cable droop compensation and
user-programmable current limit tuning. The cable compensation is only available
when the output voltage is set to 5.17 V. The cable compensation voltage is 90 mV at
2.4-A output current. Cable compensation aids portable devices in charging at
optimum current and voltage under heavy loads by changing the buck regulator output
voltage linearly with load current to counteract the voltage drop due to wire
resistance in automotive cabling. The BUS voltage measured at a connected portable
device remains approximately constant, regardless of load current, allowing the
battery charger of the portable device to work optimally.The TPS2586x-Q1 provides various
safety features for USB charging and system operations, including external negative
thermistor monitoring, cycle-by-cycle current limit, hiccup short-circuit
protection, undervoltage lockout, BUS overcurrent, OUT overcurrent, and die
overtemperature protection.The device family is available in
25-pin, 3.5-mm × 4.5-mm QFN package.
