L6986I集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

L6986I屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的L6986I穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。

Features

? Designed for iso-buck topology

? 4 V to 38 V operating input voltage

? Primary output voltage regulation / no optocoupler required

? 1.9 A typical sink peak primary current capability

? Peak current mode architecture in forced PWM operation

? 300 ns blanking time

? 8 μA IQ-SHTDWN

? Adjustable fSW and synchronization

? Embedded primary output voltage supervisor

? Adjustable soft-start time

? Internal primary current limiting

? Overvoltage protection

? RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ

? Thermal shutdown

Applications

? Isolated power supply for SiC MOSFET and IGBT drivers

? Isolated power supply for isolated interfaces (RS232, I2C, SPI, etc.)

? EV chargers

? Motor drivers

? Automation

? UPS

? Solar converters

? Welding

Description

The L6986I is a device specifically designed for the isolated buck topology. Due to

the P-Channel MOSFET as high-side power switch the device features 100 duty

cycle operation. The primary output voltage can be accurately adjusted, whereas

the isolated secondary output is derived by using a given transformer ratio. No

optocoupler is required. The primary sink capability up to 1.9 A (even during softstart)

allows a proper energy transfer to the secondary side as well as enables a

tracked soft-start of the secondary output. The control loop is based on a peak

current mode architecture and the device operates in forced PWM. The 300 ns

blanking time filters oscillations, generated by the transformer leakage inductance,

making the solution more robust. Pulse by pulse current sensing on both power

elements implements an effective constant current protection in the primary side.

Due to the primary reverse current limit, the secondary output is protected against

short circuit events. A primary output voltage supervisor, which notifies primary output

voltage regulation through the RST open collector output, overvoltage protection,

adjustable switching frequency, synchronization and a programmable soft-start are

also available.