TPS55383 - 具有外部补偿的 4.5V 至 28V 输入、双路 3A 输出、300kHz 降压转换器

TPS55383是TI德州仪器公司的一款转换器（集成开关）产品，TPS55383是具有外部补偿的 4.5V 至 28V 输入、双路 3A 输出、300kHz 降压转换器，本站介绍了TPS55383的封装应用图解、特点和优点、功能等，并给出了与TPS55383相关的TI元器件型号供参考。

TPS55383 - 具有外部补偿的 4.5V 至 28V 输入、双路 3A 输出、300kHz 降压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS55383 and TPS55386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage.

With an internally-determined operating frequency and soft start time, these converters provide many features with a minimum of external components. The outputs of the two error amplifiers are accessible allowing user optimization of the feedback loop under a wide range of output filter characteristics. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs.

The outputs may be enabled independently, or configured to allow either ratiometric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.

产品特性

4.5-V to 28-V Input Range
Output Voltage 0.8 V to 90% of Input Voltage
Output Current Up to 3 A
Two Fixed Switching Frequency Versions:
- TPS55383: 300 kHz
- TPS55386: 600 kHz
Three Selectable Levels of Overcurrent Protection (Output 2)
0.8-V 1.75% Voltage Reference
2.1-ms Internal Soft Start
Dual PWM Outputs 180° Out-of-Phase
Ratiometric or Sequential Startup Modes
Configurable as Dual Output or Two-Channel Single Output Multiphase for 6 amp Capability
85-Ω Internal High-Side MOSFETs
Current Mode Control with External Compensation
Pulse-by-Pulse Overcurrent Protection
Thermal Shutdown Protection at +148°C
16-Pin PowerPAD HTSSOP package
APPLICATIONS
- Set Top Box
- Digital TV
- Power for DSP
- Consumer Electronics

PowerPAD Is a trademark of Texas Instruments. All other trademarks are the property of their respective ownersPower.

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