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同步开关稳压器和控制器使用两个开关元件——高边开关和低边开关。这与非同步开关稳压器不同,后者一般采用单个开关控制高边电压,使用一个高速肖特基二极管作为低边开关。

同步开关稳压器一般将两个开关集成到器件中,而同步控制器仅提供开关驱动信号。无论哪种情况,开关元件均为低RDS(ON)、大功率FET。

由于两个开关的工作时序可控,再加上FET电阻比肖特基二极管低,所以同步开关稳压器和控制器的稳压效率较高。

同步开关稳压器和控制器可采用升压和降压配置。Maxim提供最先进的同步开关稳压器和控制器。

降压型(Buck)同步开关稳压器(内部开关)
降压型(Buck)同步开关控制器(外部开关)
升压型(Boost)同步开关稳压器(内部开关)
升压/降压型(Buck/Boost)同步开关稳压器(外部开关) 

了解现代开关稳压器技术,理解现代开关稳压器IC与传统稳压器的差异。

现代开关型稳压器技术

本文讨论了现代化开关稳压器优于传统设计的关键因素。新产品带来的利益是惊人的:较小的外形尺寸、设计更简单、工作温度低、效率高,以及较高的集成度,提高最终产品的健壮性和可靠性。


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现代开关型稳压器技术

November 16, 2020

本文讨论了现代化开关稳压器优于传统设计的关键因素。新产品带来的利益是惊人的:较小的外形尺寸、设计更简单、工作温度低、效率高,以及较高的集成度,提高最终产品的健壮性和可靠性。

参考设计

MAXREFDES9002: C-source Reference for Operating the DS28E18 from Cortex-M4 GPIO Pins

Extend an I2C and SPI interface using the DS28E18 with included M4 compatible 1-Wire API and C-d...

MAXREFDES1263: True Wireless Stereo Cradle and Earbuds

This solution demonstrates a small size, low power, high effective, high accuracy power manageme...
MAXREFDES179#参考设计板

MAXREFDES179#参考设计板

The MAXREFDES179 reference design is a complete Universal Serial Bus (USB) type-C PD solution fe...

MAXREFDES1275: 1A,3-Channel LED Driver in Buck Configuration using MAX20050 and its dimming control using MAX32630FTHR

The MAX20050 is a high-brightness LED driver for automotive exterior lighting applications.

MAXREFDES1046:宽输入范围、3.3V/3A输出同步整流、降压型DC-DC转换器,两层电路板设计降低成本

The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...

MAXREFDES1105: Miniature, 5V/2A, Synchronous, No-Opto Flyback DC-DC Converter with 90.4% Efficiency Using MAX17690 and MAX17606

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1102:小尺寸、24V/250mA、无光耦、反激DC-DC转换器,92%效率

The MAX17690 implements an innovative algorithm to accurately determine the output voltage by se...

MAXREFDES1045: Two-Layer Board, 5V/3A, Wide-Input, Synchronous, Step-Down DC-DC Converter Using the MAX17574

The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...

MAXREFDES1037:72W Offline Flyback Converter

The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulato...

MAXREFDES1004:-73V至-35V输入、5V/100mA输出、Boost转换器

The MAX668/MAX669 constant-frequency, pulse-width modulating (PWM), current-mode DC-DC controlle...

MAXREFDES1088:小尺寸、12V/250mA、同步、无光耦、反激DC-DC转换器,91.9%效率

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1106: Miniature, 12V/1A, Synchronous, No-Opto Flyback DC-DC Converter with 92% Efficiency Using MAX17690 and MAX17606

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1101:Miniature, 12V/500mA, No-Opto Flyback DC-DC Converter with 90% Efficiency

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1099: Miniature, 24V/500mA, No-Opto Flyback DC-DC Converter with 93% Efficiency Using the MAX17690

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1177: PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a power...