原创 Intersil ZL2008数字DC-DC转换器控制方案

 2009-9-19 18:48  1462 4 4 分类: 电源/新能源


作者：时间：2009-06-29 来源:

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.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. 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