TPS55287-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• Programmable power supply (PPS) support for

USB power delivery (USB PD)

– 3.0V to 36V wide input voltage range

– 0.8V to 22V with 10mV step programmable

output voltage range

– ±1% reference voltage accuracy

– Adjustable output voltage compensation for

voltage droop over the cable

– Programmable output current limit with 50mA

step

– ±5% accurate output current monitoring

– I2C interface

• High efficiency over entire load range

– 96.7% efficiency at VIN = 12V, VOUT = 20V, and

IOUT = 1.5A

– Programmable PFM and FPWM mode at light

load

• Avoid frequency interference and crosstalk

– Optional clock synchronization

– Programmable switching frequency from

200kHz to 2.2MHz

• EMI mitigation

– Optional programmable spread spectrum

– Lead-less package

• Rich protection features

– Output overvoltage protection

– Hiccup mode for output short-circuit protection

– Thermal shutdown protection

– 4-A average inductor current limit

• Small solution size

– Maximum switching frequency up to 2.2MHz

– 3.0mm × 5.0mm HotRod™ QFN package

2 Applications

• Wireless charger

• USB PD

• Docking station

• Industrial PC

• Power bank

• Monitor

3 Description

The TPS55287 is a synchronous buck-boost

converter that is optimized for converting battery

voltage or adapter voltage into power supply rails.

The TPS55287 integrates four MOSFET switches,

providing a compact solution for USB power delivery

(USB PD) application.

The TPS55287 has up to 36V input voltage capability.

Through the I2C interface, the output voltage of the

TPS55287 can be programmed from 0.8V to 22V with

10mV step. When working in boost mode, the device

can deliver 35W from a 12V input. It is capable of

delivering 25W from 9V input voltage.

The TPS55287 employs an average current-mode

control scheme. The switching frequency is

programmable from 200kHz to 2.2MHz by an external

resistor and can be synchronized to an external

clock. The TPS55287 also provides optional spread

spectrum to minimize peak EMI.

The TPS55287 offers output overvoltage protection,

average inductor current limit, cycle-by-cycle peak

current limit, and output short circuit protection.

The TPS55287 also makes sure it safely operates

with optional output current limit and hiccup-mode

protection in sustained overload conditions.

The TPS55287 can use a small inductor and

small capacitors with high switching frequency. It is

available in a 3.0mm × 5.0mm QFN package.