USB Type-C® + Type-A dual charging ports controller with programmable current limit & load shedding

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 800 kHz, operating below

400 kHz results in better system efficiency.

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. It 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.