- 您现在的位置：买卖IC网 > PDF目录69512 > TPS54620RGYR (TEXAS INSTRUMENTS INC) 11 A SWITCHING REGULATOR, 1760 kHz SWITCHING FREQ-MAX, PQCC14 PDF资料下载
参数资料
| 型号： | TPS54620RGYR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 11 A SWITCHING REGULATOR, 1760 kHz SWITCHING FREQ-MAX, PQCC14 |
| 封装： | 3.50 X 3.50 MM, GREEN, PLASTIC, MO-241BA, VQFN-14 |
| 文件页数： | 5/44页 |
| 文件大小： | 1827K |
| 代理商： | TPS54620RGYR |
第1页第2页第3页第4页当前第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页第39页第40页第41页第42页第43页第44页
(
)
0.997
2
-
W
×
-
R rt(k
) = 4 8 0 0 0 F sw k H z
Fsw Oscillator Frequency kHz
0
50
100
150
200
250
200
400
600
800
1000
1200
1400
1600
R
T
Resistance
k
RT/CLK
TPS54620
Rrt
RT/CLK
modeselect
SLVS949C
– MAY 2009 – REVISED MAY 2011
In RT mode, a resistor (RT resistor) is connected between the RT/CLK pin and GND. The switching frequency of
the device is adjustable from 200 kHz to 1600 kHz by placing a maximum of 240 k
Ω and minimum of 29 k
respectively. In CLK mode, an external clock is connected directly to the RT/CLK pin. The device is synchronized
to the external clock frequency with PLL.
The CLK mode overrides the RT mode. The device is able to detect the proper mode automatically and switch
from the RT mode to CLK mode.
Adjustable Switching Frequency (RT Mode)
To determine the RT resistance for a given switching frequency, use Equation 4 or the curve in Figure 20. To
reduce the solution size one would set the switching frequency as high as possible, but tradeoffs of the supply
efficiency and minimum controllable on time should be considered.
(4)
Figure 20. RT Set Resistor vs Switching Frequency
Synchronization (CLK mode)
An internal Phase Locked Loop (PLL) has been implemented to allow synchronization between 200kHz and
1600kHz, and to easily switch from RT mode to CLK mode.
To implement the synchronization feature, connect a square wave clock signal to the RT/CLK pin with a duty
cycle between 20% to 80%. The clock signal amplitude must transition lower than 0.8V and higher than 2.0V.
The start of the switching cycle is synchronized to the falling edge of RT/CLK pin.
In applications where both RT mode and CLK mode are needed, the device can be configured as shown in
Figure 21. Before the external clock is present, the device works in RT mode and the switching frequency is set
by RT resistor. When the external clock is present, the CLK mode overrides the RT mode. The first time the
SYNC pin is pulled above the RT/CLK high threshold (2.0V), the device switches from the RT mode to the CLK
mode and the RT/CLK pin becomes high impedance as the PLL starts to lock onto the frequency of the external
clock. It is not recommended to switch from the CLK mode back to the RT mode because the internal switching
frequency drops to 100kHz first before returning to the switching frequency set by RT resistor.
Figure 21. Works with Both RT mode and CLK mode
Copyright
2009–2011, Texas Instruments Incorporated
13
相关PDF资料 |
PDF描述 |
|---|---|
| TPS54673PWPR | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54673PWP | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54673PWPG4 | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54673PWPRG4 | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54900PWG4 | SPECIALTY ANALOG CIRCUIT, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54620RGYT | 功能描述:直流/直流开关调节器 4.5-17Vin 6A Synch St Down SWIFT Cnvtr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS54620RGYT-P | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| TPS54620RHLR | 功能描述:直流/直流开关转换器 4.5-17Vin,6A Syn Step Down Cnvrtr 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 |
| TPS54620RHLT | 功能描述:直流/直流开关转换器 4.5-17Vin,6A Syn Step Down Cnvrtr 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 |
| TPS54622 | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5V to 17V Input, 6A Synchronous Step Down SWIFT? Converter With Hiccup |
发布紧急采购，3分钟左右您将得到回复。