- 您现在的位置：买卖IC网 > PDF目录20426 > TPS54260EVM-597 (Texas Instruments)EVAL MODULE FOR TPS54260 PDF资料下载
参数资料
| 型号： | TPS54260EVM-597 |
| 厂商： | Texas Instruments |
| 文件页数： | 32/52页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TPS54260 |
| 标准包装： | 1 |
| 系列： | SWIFT™ |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 2.5A |
| 输入电压： | 10.8 ~ 13.2 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | TPS54260 |
| 其它名称： | 296-30449 TPS54260EVM-597-ND |
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页当前第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页第45页第46页第47页第48页第49页第50页第51页第52页
SLVSA86A – MARCH 2010 – REVISED DECEMBER 2010
www.ti.com
Input Capacitor
The TPS54260 requires a high quality ceramic, type X5R or X7R, input decoupling capacitor of at least 3 m F of
effective capacitance and in some applications a bulk capacitance. The effective capacitance includes any dc
bias effects. The voltage rating of the input capacitor must be greater than the maximum input voltage. The
capacitor must also have a ripple current rating greater than the maximum input current ripple of the TPS54260.
The value of a ceramic capacitor varies significantly over temperature and the amount of dc bias applied to the
capacitor. The capacitance variations due to temperature can be minimized by selecting a dielectric material that
is stable over temperature. X5R and X7R ceramic dielectrics are usually selected for power regulator capacitors
because they have a high capacitance to volume ratio and are fairly stable over temperature. The output
capacitor must also be selected with the dc bias taken into account. The capacitance value of a capacitor
decreases as the dc bias across a capacitor increases.
For this example design, a ceramic capacitor with at least a 60V voltage rating is required to support the
maximum input voltage. Common standard ceramic capacitor voltage ratings include 4V, 6.3V, 10V, 16V, 25V,
50V or 100V so a 100V capacitor should be selected. For this example, two 2.2 m F, 100V capacitors in parallel
have been selected. Table 2 shows a selection of high voltage capacitors. The input capacitance value
determines the input ripple voltage of the regulator. The input voltage ripple can be calculated using Equation 39 .
Using the design example values, Ioutmax = 2.5 A, Cin = 4.4 m F, ?sw = 300 kHz, yields an input voltage ripple of
206 mV and a rms input ripple current of 1.15 A.
Icirms = Iout ′
Vout
Vin min
′
( Vin min - Vout )
Vin min
(38)
Vin =
Iout max ′ 0.25
Cin ′ | sw
Table 2. Capacitor Types
(39)
VENDOR
Murata
Vishay
TDK
AVX
VALUE ( m F)
1.0 to 2.2
1.0 to 4.7
1.0
1.0 to 2.2
1.0 10 1.8
1.0 to 1.2
1.0 to 3.9
1.0 to 1.8
1.0 to 2.2
1.5 to 6.8
1.0. to 2.2
1.0 to 3.3
1.0 to 4.7
1.0
1.0 to 4.7
1.0 to 2.2
EIA Size
1210
1206
2220
2225
1812
1210
1210
1812
VOLTAGE
100 V
50 V
100 V
50 V
50 V
100 V
50 V
100 V
100 V
50 V
100 V
50 V
50 V
100 V
50 V
100 V
DIALECTRIC
X7R
COMMENTS
GRM32 series
GRM31 series
VJ X7R series
C series C4532
C series C3225
X7R dielectric series
Slow Start Capacitor
The slow start capacitor determines the minimum amount of time it will take for the output voltage to reach its
nominal programmed value during power up. This is useful if a load requires a controlled voltage slew rate. This
is also used if the output capacitance is large and would require large amounts of current to quickly charge the
capacitor to the output voltage level. The large currents necessary to charge the capacitor may make the
TPS54260 reach the current limit or excessive current draw from the input power supply may cause the input
voltage rail to sag. Limiting the output voltage slew rate solves both of these problems.
32
Product Folder Link(s): TPS54260
Copyright ? 2010, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| VI-BNL-CX-F4 | CONVERTER MOD DC/DC 28V 75W |
| T95D277K004ESSS | CAP TANT 270UF 4V 10% 2917 |
| HT32 | BI-LATERAL TRIGGER DIACS |
| LM4040AIM3-3.0+T | IC VREF SHUNT PREC 3V SOT-23-3 |
| REC5-0509SRW/H2/A | CONV DC/DC 5W 4.5-9VIN 09VOUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54260MDGQTEP | 功能描述:IC REG BUCK ADJ 2.5A 10MOSP 制造商:texas instruments 系列:Eco-Mode? 包装:剪切带（CT） 零件状态:在售 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:3.5V 电压 - 输入（最大值）:60V 电压 - 输出（最小值/固定）:0.8V 电压 - 输出（最大值）:60V 电流 - 输出:2.5A 频率 - 开关:100kHz ~ 2.5MHz 同步整流器:无 工作温度:-40°C ~ 150°C（TJ） 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商器件封装:10-MSOP-PowerPad 标准包装:1 |
| TPS54260MDRCTEP | 功能描述:IC REG BUCK ADJ 2.5A 10VSON 制造商:texas instruments 系列:Eco-Mode? 包装:剪切带（CT） 零件状态:在售 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:3.5V 电压 - 输入（最大值）:60V 电压 - 输出（最小值/固定）:0.8V 电压 - 输出（最大值）:60V 电流 - 输出:2.5A 频率 - 开关:100kHz ~ 2.5MHz 同步整流器:无 工作温度:-40°C ~ 150°C（TJ） 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘 供应商器件封装:10-VSON（3x3） 标准包装:1 |
| TPS54260-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3.5 V to 60 V STEP DOWN CONVERTER WITH ECO-MODEa?￠ |
| TPS54260QDGQRQ1 | 功能描述:直流/直流开关转换器 3.5-42Vin,2.5A,2.5 MHz 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 |
| TPS54260QDRCRQ1 | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 2.5A 10-VFDFN Exposed Pad 制造商:texas instruments 系列:汽车级，AEC-Q100，Eco-Mode? 包装:剪切带（CT） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:3.5V 电压 - 输入（最大值）:60V 电压 - 输出（最小值/固定）:0.8V 电压 - 输出（最大值）:60V 电流 - 输出:2.5A 频率 - 开关:100kHz ~ 2.5MHz 同步整流器:无 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘 供应商器件封装:10-VSON（3x3） 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。