TPS551892-Q1数据手册TI中文资料规格书

描述 Description

The TPS551892-Q1 is a synchronous buck-boost converter that is optimized for converting battery voltage or adapter voltage into power supply rails. The TPS551892-Q1 integrates four MOSFET switches providing a compact solution for a variety of applications. The TPS551892-Q1 has up to 27V input voltage capability. When working in boost mode, the TPS551892-Q1 can deliver 60W from a 12V input. It is capable of delivering 45W from 9V input voltage.

The TPS551892-Q1 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 TPS551892-Q1 also provides optional spread spectrum to minimize peak EMI.

The TPS551892-Q1 offers output over-voltage protection, average inductor current limit, cycle-by-cycle peak current limit, output short circuit protection. The TPS551892-Q1 also ensures safe operating with optional output current limit and hiccup-mode protection in sustained overload conditions.

The TPS551892-Q1 can use a small inductor and small capacitors with high switching frequency. It is available in a 3.0mm × 5.0mm QFN package.

特性 Features

• AEC-Q100 qualified:
• Device temperature grade 1: –40°C to +125°C ambient operating temperature range

• Wide input and output voltage range
• Wide input voltage range: 3.0V to 27V (absolute maximum. 42V)
• Programmable output voltage range: 0.8V to 22V
• ±1% reference voltage accuracy
• Adjustable output voltage compensation for voltage droop over the cable
• ±5% accurate output current monitoring

• High efficiency over entire load range
• 96% efficiency at VIN = 12V, VOUT = 20V and IOUT = 3A
• 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
• 8 A average inductor current limit

• Small solution size
• Maximum switching frequency up to 2.2MHz
• 3.0mm × 5.0mm HotRod™ QFN package