- 您现在的位置：买卖IC网 > PDF目录69509 > TPS40195PWG4 (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | TPS40195PWG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, TSSOP-16 |
| 文件页数： | 9/43页 |
| 文件大小： | 1086K |
| 代理商： | TPS40195PWG4 |
第1页第2页第3页第4页第5页第6页第7页第8页当前第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
(
)
(
)
(
)
(
)
( )(
)
ILIM min
ILIMOFST min
SCP min
DS on max
I
R
V
I
R
+
=
(5)
(
)
(
)
(
)
(
)
(
)
ILIM max
ILIMOFST max
SCP max
DS(on) min
I
R
V
I
R
+
=
(6)
(
)
(
)
(
)
ILIMH min
OUT max
DS(on) max
V
I
R
=
(7)
f
DAC
OFF
SC
7 N
t
=
(8)
5-V Regulator
www.ti.com ........................................................................................................................................ SLUS720D – FEBRUARY 2007 – REVISED NOVEMBER 2008
where
I
S.P. is the short circuit current
I
ILIM is ILIM pin bias current, 9.0A (typ)
R
ILIM is the resistance connected from ILIM to GND
V
ILIMOFST is the offset voltage of the low side current sense comparator, ±20 mV
R
DS(on) is the channel resistance of the low-side MOSFET
The short circuit protection threshold for the high-side MOSFET is fixed at 550-mV typical, 400-mV minimum with
a 4000 ppm/°C temperature coefficient to help compensate for changes in the high side FET channel resistance
as temperature increases. This threshold is in place to provide a maximum current output in the case of a fault.
The maximum amount of current that can be sourced from a converter can be found by Equation 7.
where
I
OUT(max) is the maximum current that the converter is specified to source
V
ILIMH(min) is the short circuit threshold for the high-side MOSFET (400 mV)
R
DS(on)max is the maximum resistance of the high-side MOSFET
If the required current from the converter is greater than the calculated IOUT(max) , a lower resistance high-side
MOSFET must be chosen.
The length of time between restart attmepts after an output fault can be found from Equation 8.
where
N
DAC is the number of 1-V DAC ramp cycles from Table 2.
f
SW is the switching frequency in Hz
This device has an on board 5-V regulator that allows the parts to operate from a single voltage feed. No
separate 5-V feed to the part is required. This regulator requires a minimum of 1
F of capacitance on the BP pin
for stability. A ceramic capacitor is suggested for this purpose. Noise performance can be improved by increasing
this capacitance to 4.7
F when driving FETs with more than 25nC gate charge requirements.
This regulator can also be used to supply power to nearby circuitry, eliminating the need for a separate LDO in
some cases. If this pin is used for external loads, be aware that this is the power supply for the internals of the
TPS40195. While efforts have been made to reduce sensitivity, any noise induced on this line has an adverse
effect on the overall performance of the internal circuitry and shows up as increased pulse jitter, or skewed
reference voltage. Note that when the EN pin is pulled low, the BP regulator will be turned off and not available
to supply power to external loads.
The amount of power available from this pin varies with the size of the power MOSFETs that the drivers must
operate. Larger MOSFETs require more gate drive current and reduces the amount of power available on this pin
for other tasks.
Copyright 2007–2008, Texas Instruments Incorporated
17
Product Folder Link(s): TPS40195
相关PDF资料 |
PDF描述 |
|---|---|
| TPS40195PW | SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40200DRBT | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS40200HD | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS40210QDGQRQ1 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40304DRCT | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40195PWR | 功能描述:DC/DC 开关控制器 4.5V to 20V Buck 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 |
| TPS40195PWRG4 | 功能描述:DC/DC 开关控制器 4.5V-20V Buck Cntrlr 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 |
| TPS40195RGYR | 功能描述:DC/DC 开关控制器 4.5V-20V Buck Cntrlr 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 |
| TPS40195RGYRG4 | 功能描述:DC/DC 开关控制器 4.5V-20V Buck Cntrlr 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 |
| TPS40195RGYT | 功能描述:DC/DC 开关控制器 4.5V-20V Buck Cntrlr 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 |
发布紧急采购，3分钟左右您将得到回复。