参数资料
| 型号： | NCP5393BMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC CTLR 2/3/4PHASE CPU 48QFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，CPU |
| 输入电压： | 4.75 V ~ 5.25 V |
| 输出数： | 1 |
| 输出电压： | 0.013 V ~ 1.55 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 带卷 (TR) |
NCP5393B
Programming the Current Limit and the Oscillator Frequency
The demo board is set for an operating frequency of
approximately 330 kHz. The ROSC pin provides a 2.0 V
reference voltage which is divided down with a resistor
divider and fed into the current limit pin ILIM. Calculate the
total series resistance to set the frequency and then calculate
proportional to the resistance and frequency is inversely
proportional to the total resistance. The total resistance may
be estimated by Equation 2. This equation is valid for the
individual phase frequency in both three and four phase
mode.
the individual RLIM1 and RLIM2 values for the divider.
The series resistors RLIM1 and RLIM2 sink current from
the ILIM pin to ground. This current is internally mirrored
into a capacitor to create an oscillator. The period is
RTOTAL ^ 24686
30.5 · k W ^ 24686
Fsw ? 1.1549
330 ? 1.1549
(eq. 1)
Figure 12. ROSC vs. Frequency
The current limit function is based on the total sensed
current of all phases multiplied by a gain of 6. DCR sensed
the expected average maximum temperature of the inductor
windings.
inductor current is function of the winding temperature. The
best approach is to set the maximum current limit based on
Calculate the current limit voltage:
DCRTmax + DCR25C ·
(1 ) 0.00393 (T max ? 25))
(eq. 2)
· Vin ? Vout * (N ? 1) · Vout
VILIMIT ^ 6 · IMIN_OCP · DCRTmax )
DCRTmax · Vout
2 · Vin · Fsw
L L
(eq. 3)
Solve for the individual resistors:
RLIM2 +
VILIMIT · RTOTAL
2·V
(eq. 4)
RLIM1 + RTOTAL ? RLIM2
(eq. 5)
Final Equation for the Current Limit Threshold
2 · V · RLIM2
· Vin ? Vout * (N ? 1) · Vout
ILIMIT(Tinductor) ^
RLIM1 ) RLIM2
6 · (DCR25C · (1 ) 0.00393(TInductor ? 25)))
*
Vout
2 · Vin · Fsw
L L
(eq. 6)
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 13.7 k W for RLIM2 yield a nominal
operating frequency of 330 kHz and an approximate current
limit of 152 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.
http://onsemi.com
21
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| NCP5393MNR2G | 功能描述:马达/运动/点火控制器和驱动器 2/3/4 PHASE CONTROLR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| NCP5395 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:CPU Applications |
| NCP5395GMNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PH CONTROLLER/ DRIVE RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5395MNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PH CTRL/DRIVE RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5395T | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller with On Board Gate Drivers for CPU Applications |
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