UC3879DW屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由美國德州儀器公司制造生產(chǎn)的UC3879DWDC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓撲結(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。

FEATURES

· Programmable Output Turn On Delay; Zero

Delay Available

· Compatible with Voltage Mode or Current

Mode Topologies

· Practical Operation at Switching Frequencies

to 300 kHz

· 10-MHz Error Amplifier

· Pin Programmable Undervoltage Lockout

· Low Startup Current – 150 mA

· Soft Start Control

· Outputs Active Low During UVLO

DESCRIPTION

The UC3879 controls a bridge power stage by phase

shifting the switching of one half-bridge with respect

to the other. This allows constant frequency pulse

width modulation in combination with resonant,

zero-voltage switching for high efficiency

performance. The UC3879 can be configured to

provide control in either voltage mode or current

mode operation, with overcurrent shutdown for fast

fault protection.

Independently programmable time delays provide

dead-time at the turn-on of each output stage,

allowing time for each resonant switching interval.