收藏本站
BD7844AEFV
Datasheet
All BD7844AEFV on the I C bus can be reset in the power supply on condition by software reset. In the correct
● Function explaining - continued
3-2. Software reset
2
execution, there should not be device that monopolizes the bus. Software reset is defined as follows.
The slave address for software reset that the R/W bit is set to "0" (write) is sent by the I C bus master.
1.
2.
3.
4.
5.
6.
7.
The START condition is sent by the I 2 C bus master.
2
Only when it is recognized that the slave address for software reset is [10110110] (B6h), BD7844AEFV executes
reset. When the R/W bit is set to logic "1" (read), it is not recognized. Even R/W bit is logic "0" and "1", the
acknowledgement is returned. But it is only logic "0" that reset is recognized.
When the slave address for software reset is sent and recognized, the master sends two bytes with two specific
values.
Byte 1= A5h: BD7844AEFV recognizes only this value. When byte 1 is not A5h, BD7844AEFV doesn't recognize
it.
Byte 2= 5Ah: BD7844AEFV recognizes only this value. When byte 2 is not 5Ah, BD7844AEFV doesn't recognize it.
The master sends the STOP condition to terminate the software reset command when correct two bytes are sent
and it is recognized correctly. Afterwards, BD7844AEFV is reset in the power supply on condition.
3-3. Device limitation software reset
Only BD7844AEFV selected in the slave address can be reset in the power supply on condition by making the
LIMITRESET bit of the Mode1 register logic 1.
3-4. External reset
External reset is executed by maintaining RESETB terminal for the period of minimum t W . The register and the I 2 C bus
state machine of BD7844AEFV is maintained in the state of default until becoming RESETB input becomes “H” level.
Take care: Please connect the RESETB terminal with “H”, when you do not use an active connection.
4. I2CSEL function
It can be set that the SDA terminal accepts only the input by connecting the I2CSEL terminal with “L”.
Take care : Because the acknowledge and reading data of the register is not returned to the master
device, control software for I 2 C cannot be used as it is.
● Power dissipation (On the ROHM’s standard board)
1.8
1.6
1.45W
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
25
50
75
100
125
150
Ta （℃）
Figure 7. Power dissipation
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
11/14
TSZ02201-0G3G0CZ00310-1-2
15.Oct.2012 Rev.001
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
BD8105FV-E2 IC LED DVR SERIAL PAR 20-SSOP
BD8112EFV-ME2 IC LED DRIVER 24-VSSOP
BD8119FM-ME2 IC WHITE LED DVR PWM 28-HSOP
BD82103GWL-E2 IC LED DRVR WHITE BCKLGT 11-UCSP
BD9206EFV-E2 IC LED DRIVER 6V LCD 20HTSSOP
BD9207FPS-E2 IC LED DVR STEPDWN 1.5A TO252S-5
BH-14E_TI-20T_CTI ADAPTER PIN CONVERTER 14-20 PIN
BH-20E_CTI-60T_TI ADAPTER PIN CONVERTER 20-60 PIN
相关代理商/技术参数
BD785 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述:
BD7851FP 制造商:ROHM 制造商全称:Rohm 功能描述:Serial / Parallel 4-input Drivers
BD7851FP-E2 功能描述:功率驱动器IC SERIAL IN/PARALLEL OUT 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
BD786 制造商:未知厂家 制造商全称:未知厂家 功能描述:TRANSISTOR | BJT | DARLINGTON | PNP | 45V V(BR)CEO | 4A I(C) | TO-127VAR
BD7861KN-E2 制造商:ROHM 制造商全称:Rohm 功能描述:Mixer & Selector IC with PCM CODEC and 16bit D/A Converter
BD787 功能描述:两极晶体管 - BJT 4A 60V 15W NPN RoHS:否 制造商:STMicroelectronics 配置: 晶体管极性:PNP 集电极—基极电压 VCBO: 集电极—发射极最大电压 VCEO:- 40 V 发射极 - 基极电压 VEBO:- 6 V 集电极—射极饱和电压: 最大直流电集电极电流: 增益带宽产品fT: 直流集电极/Base Gain hfe Min:100 A 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PowerFLAT 2 x 2
BD787/D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Complementary Plastic Silicon Power Transistors
BD787_06 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Complementary Plastic Silicon Power Transistors