- 您现在的位置：买卖IC网 > Datasheet目录346 > NCP5890MUTXG (ON Semiconductor)IC LED DRVR WHITE BCKLGT 16-UQFN Datasheet资料下载
参数资料
| 型号： | NCP5890MUTXG |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16-UQFN |
| 产品变化通告： | Product Obsolescence 07/Jul/2010 |
| 标准包装： | 3,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 3 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光，照明管理装置（LMU） |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 1.13MHz ~ 1.47MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 30 V ~ 34 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFQFN 裸露焊盘 |
| 供应商设备封装： | 16-UQFN-EP（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
NCP5890
Although the total ohmic resistance plays an important
role in the losses developed in the converter, the switching
losses are key when the operating frequency is beyond a
few kilohertz range. To minimize such losses, the internal
power NMOS is designed to minimize the dI/dt, thus
minimizing the I*V crossing time. As a consequence, the
slope of the positive going voltage ? VLX ? present at the Lx
pin is very fast as well and an overshoot is created since the
Schottky rectifier has an intrinsic turn-on time: the voltage
keeps going until the diode turns ? on, clamping the VLX
in Figure 6. The proposed Schottky, depicted in the
schematic Figure 1, is a good alternative to minimize such
an overshoot.
On the other hand, the same overshoot is propagated to
the Vout voltage when the system operates under open load
condition. As a consequence, it is strongly recommended
to implement a simple filter, built with a small footprint
resistor, to makes sure that no any uncontrolled operation
of the high sensitive pin Vos will happen under the worst
case conditions: see Figure 1, resistor R5.
voltage at the output value. Such a mechanism is depicted
Figure 6. Typical Turn On Time of the Schottky Rectifier
I2C Protocol
The standard I2C protocol is used to transfer the data
from the MCU to the NCP5890. Leaving aside the
Acknowledge bit, the NCP5890 chip does not return data
back to the MCU.
The physical address of the NCP5890 can be selected as
0111 001X or 0111 010X (the X being the Read / Write
identifier as defined by the I2C specification) depending
upon the digital status present at the I2CADR pin:
I2CADR = Low 3 address = %0111 0010 = $72
I2CADR = High 3 address = %0111 0100 = $74
In order to avoid any risk during the operation, the digital
level at the I2CADR pin must be hardwired either to GND
or to Vbat prior to power up the system.
To set up a new output current value, a full frame will be
sent by the MCU. The frame contains three consecutive
bytes and shall fulfill the I2C specifications (see Figure 7):
? First byte : I2C address, write 3 $72
(assuming I2CADR = Low)
? Second byte : register selection 3 %0000 XXXX =
internal register address
? Third byte : DATA 3 %XXXX XXXX = function /
output current value
An infinite number of register selection / data pair can be
send on the I2C port once the physical address has been
decoded (see Figure 8). The transmission ends when the
STOP signal is send by the SCL/SDA digital code.
The first byte of the I2C frame shall be selected address
($72 or $74) when a Write is send to the chip.
http://onsemi.com
8
相关PDF资料 |
PDF描述 |
|---|---|
| NCP5901BMNTBG | IC MOSFET DVR SYNC VR12 8-DFN |
| NCP5901MNTBG | IC MOSFET DVR SYNC VR12 8-DFN |
| NCP5911MNTBG | IC MOSFET DVR SYNC VR12 8-DFN |
| NCP692MN50T2GEVB | EVAL BOARD FOR NCP692MN50T2G |
| NCV7513AFTR2G | IC PREDRIVER HEX LOW SIDE 32LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5901BDR2G | 功能描述:功率驱动器IC VR12 MOSFET DRIVER RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| NCP5901BEMNTBG | 制造商:ON Semiconductor 功能描述:VR12 MOSFET DRIVER - Tape and Reel |
| NCP5901BMNTBG | 功能描述:功率驱动器IC VR12 MOSFET DRIVER RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| NCP5901DR2G | 功能描述:功率驱动器IC VR12 MOSFET DRIVER RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| NCP5901EMNTBG | 制造商:ON Semiconductor 功能描述:VR12 MOSFET DRIVER - Tape and Reel |
发布紧急采购，3分钟左右您将得到回复。