数字DC-DC转换器控制原理 ZL2008的主要特性 方框图

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数字DC-DC转换器控制原理

本文介绍了ZL2008的主要特性,方框图以及采用ZL2008的12V到1.8V/16A应用电路图.

       Intersil 公司的ZL2008是集成了MOSFET驱动器的数字DC-DC控制器,电流共享允许多个器件能并行连接到源负载,以提供非常高的电流. ZL2008的自适应优化算法提高了电源转换效率.输入电压从3V到14V,输出电压从0.54V到5.5V,输出电压精度±1%,具有POLA和DOSA电压调整模式,可用在服务器/存储设备,电信/数据通信设备以及电源模快.

The ZL2008 is a digital DC-DC controller with integrated MOSFET drivers. Current sharing allows multiple devices to be connected in parallel to source loads with very high current demands. Adaptive performance optimization algorithms improve power conversion efficiency. Zilker Labs Digital-DC technology enables a blend of power conversion performance and power management features.

The ZL2008 is designed to be a flexible building block for DC power and can be easily adapted to designs ranging from a single-phase power supply operating from a 3.3 V input to a multi-phase supply operating from a 12 V input. The ZL2008 eliminates the need for complicated power supply managers as well as numerous external discrete components.

Key operating features can be configured by pin-straps, including compensation, current sharing and output voltage. The ZL2008 uses the I2C/SMBus with PMBus protocol for communication with a host controller and the Digital-DC bus for communication between Zilker Labs devices.

ZL2008主要特性:

Power Conversion

Efficient synchronous buck controller

Adaptive light load efficiency optimization

3 V to 14 V input range

0.54 V to 5.5 V output range (with margin)

POLA and DOSA voltage trim modes

±1% output voltage accuracy

Internal 3 A MOSFET drivers

Fast load transient response

Current sharing and phase interleaving

Snapshot parameter capture

RoHS compliant (6 x 6 mm) QFN package

Power Management

Digital soft start / stop

Precision delay and ramp-up

Power good / enable

Voltage tracking, sequencing and margining

Voltage, current and temperature monitoring

I2C/SMBus interface, PMBus compatible

Output voltage and current protection

Internal non-volatile memory (NVM)

ZL2008应用:

Servers / storage equipment

Telecom / datacom equipment

Power supply modules



图1.ZL2008方框图



图2.采用ZL2008的12V到1.8V/16A应用电路图

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