- 您现在的位置：买卖IC网 > PDF目录68419 > TPS62650YFFR (TEXAS INSTRUMENTS INC) 1.7 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA9 PDF资料下载
参数资料
| 型号： | TPS62650YFFR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.7 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA9 |
| 封装： | GREEN, DSBGA-9 |
| 文件页数： | 17/38页 |
| 文件大小： | 820K |
| 代理商： | TPS62650YFFR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
SLVS808A
– AUGUST 2009 – REVISED FEBRUARY 2011
THEORY OF OPERATION
Serial Interface Description
I2C is a 2-wire serial interface developed by Philips Semiconductor (see I2C-Bus Specification, Version 2.1,
January 2000). The bus consists of a data line (SDA) and a clock line (SCL) with pull-up structures. When the
bus is idle, both SDA and SCL lines are pulled high. All the I2C compatible devices connect to the I2C bus
through open drain I/O pins, SDA and SCL. A master device, usually a microcontroller or a digital signal
processor, controls the bus. The master is responsible for generating the SCL signal and device addresses. The
master also generates specific conditions that indicate the START and STOP of data transfer. A slave device
receives and/or transmits data on the bus under control of the master device.
The TPS6265x device works as a slave and supports the following data transfer modes, as defined in the
I2C-Bus Specification: standard mode (100 kbps), fast mode (400 kbps), fast mode plus (1 Mbps) and high-speed
mode (up to 3.4 Mbps). The interface adds flexibility to the power supply solution, enabling most functions to be
programmed to new values depending on the instantaneous application requirements. Register contents remain
intact as long as supply voltage remains above 2.1 V (typical).
The data transfer protocol for standard, fast and fast plus modes is exactly the same, therefore, they are referred
to as F/S-mode in this document. The protocol for high-speed mode is different from the F/S-mode, and it is
referred to as HS-mode. The TPS6265x device supports 7-bit addressing; 10-bit addressing and general call
address are not supported.
The TPS6265x device has a 7-bit address with two bits factory programmable allowing up to four dc/dc
converters to be connected to the same bus. The 4 MSBs are 1001 and the LSB is 0.
Standard-, Fast- and Fast-Mode Plus Protocol
The master initiates data transfer by generating a start condition. The start condition is when a high-to-low
transition occurs on the SDA line while SCL is high, see Figure 50. All I2C-compatible devices should recognize a
start condition.
The master then generates the SCL pulses, and transmits the 7-bit address and the read/write direction bit R/W
on the SDA line. During all transmissions, the master ensures that data is valid. A valid data condition requires
the SDA line to be stable during the entire high period of the clock pulse, see Figure 51. All devices recognize
the address sent by the master and compare it to their internal fixed addresses. Only the slave device with a
matching address generates an acknowledge, see Figure 52, by pulling the SDA line low during the entire high
period of the ninth SCL cycle. Upon detecting this acknowledge, the master knows that the communication link
with a slave has been established.
The master generates further SCL cycles to either transmit data to the slave (R/W bit 1) or receive data from the
slave (R/W bit 0). In either case, the receiver needs to acknowledge the data sent by the transmitter. An
acknowledge signal can either be generated by the master or by the slave, depending on which one is the
receiver. 9-bit valid data sequences consisting of 8-bit data and 1-bit acknowledge can continue as long as
necessary.
To signal the end of the data transfer, the master generates a stop condition by pulling the SDA line from low to
high while the SCL line is high, see Figure 50. This releases the bus and stops the communication link with the
addressed slave. All I2C compatible devices must recognize the stop condition. Upon the receipt of a stop
condition, all devices know that the bus is released, and they wait for a start condition followed by a matching
address
Attempting to read data from register addresses not listed in this section results in 00h being read out.
24
2009–2011, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| TPS62650YFF | 1.7 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, BGA9 |
| TPS62731DRYR | SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62730DRY | SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62732DRYT | SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62732DRY | SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS62650YFFT | 功能描述:直流/直流开关转换器 800mA 6MHz Synch Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS62651YFFR | 功能描述:直流/直流开关转换器 800mA,6MHz High Eff Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS62651YFFT | 功能描述:直流/直流开关转换器 800mA,6MHz High Eff Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS62660EVM-419 | 功能描述:电源管理IC开发工具 TPS62660 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS62660YFFR | 功能描述:直流/直流开关转换器 1000mA,6MHz Synch Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。