参数资料
型号: NCP5385MNR2G
厂商: ON Semiconductor
文件页数: 29/34页
文件大小: 0K
描述: IC CTLR BUCK 2/3/4PHASE 40-QFN
产品变化通告: Specification Change MSL Updated 13/June/2008
Product Discontinuation 01/Oct/2008
标准包装: 2,500
应用: 控制器,Intel Pentium? IV
输入电压: 10.8 V ~ 13.2 V
输出数: 6
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 40-VFQFN 裸露焊盘
供应商设备封装: 40-QFN(7x7)
包装: 带卷 (TR)
NCP5385
Final Equation for the Current Limit Threshold
) 0.02
· Vin ? Vout * (N ? 1) · Vout
ILIMIT(Tinductor) ^
2 · V · RLIM2
RLIM1 ) RLIM2
5.94 · (DCR25C · (1 ) 0.00393 · C ? 1(TInductor ? 25 · C)))
*
Vout
2 · Vin · Fs
L L
(eq. 7)
The inductors on the demo board have a DCR at 25 ° C of
0.75 m W . Selecting the closest available values of 16.9 k W
for RLIM1 and 15.8 k W for RLIM2 yield a nominal
operating frequency of 305 kHz and an approximate
current limit of 180 A at 100 ° C. The total sensed current
can be observed as a scaled voltage at the VDRP pin added
to a positive, no ? load offset of approximately 1.3 V.
Inductor Selection
When using inductor current sensing it is recommended
that the inductor does not saturate by more than 10% at
maximum load. The inductor also must not go into hard
saturation before current limit trips. The demo board includes
a four phase output filter using the T50 ? 8 core from
Micrometals with 4turns and a DCR target of 0.75 m W @
25 ° C. Smaller DCR values can be used, however, current
sharing accuracy and droop accuracy decrease as DCR
decreases. Use the excel spreadsheet for regulation accuracy
calculations for a specific value of DCR.
http://onsemi.com
29
相关PDF资料
PDF描述
NCP5386BMNR2G IC CTLR BUCK 1/2PHASE 32-QFN
NCP5387MNR2G IC CTLR BUCK 2/3/4PHASE 40-QFN
NCP5388MNR2G IC CTLR BUCK 2/3/4PHASE 40-QFN
NCP5389MNR2G IC CTLR BUCK 2/3PHASE 32-QFN
NCP5391MNR2G IC CTLR BUCK 2/3PHASE 32-QFN
相关代理商/技术参数
参数描述
NCP5386 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1/2 Phase Controller for CPU and Chipset Applications
NCP5386A 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1/2 Phase Controller for CPU and Chipset Applications
NCP5386AMNR2G 功能描述:软开关 PWM 控制器 1/2 PHASE CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
NCP5386B 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1/2 Phase Controller for CPU and Chipset Applications
NCP5386BMNR2G 功能描述:软开关 PWM 控制器 1/2 PHASE CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel