参数资料
| 型号： | TPS54160ADRCR |
| 厂商： | Texas Instruments |
| 文件页数： | 32/55页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.5A 10SON |
| 标准包装： | 3,000 |
| 系列： | SWIFT™, Eco-Mode™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 58 V |
| 输入电压： | 3.5 V ~ 60 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz ~ 2.5MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-SON 裸露焊盘（3x3） |
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SLVSB56C – MAY 2012 – REVISED FEBRUARY 2014
The typical minimum on time, t onmin , is 130 ns for the TPS54160A. For this example, the output voltage is 3.3 V
and the maximum input voltage is 18 V, which allows for a maximum switch frequency up to 1600 kHz when
including the inductor resistance, on resistance and diode voltage in Equation 12 . To ensure overcurrent
runaway is not a concern during short circuits in your design use Equation 13 or the solid curve in Figure 42 to
determine the maximum switching frequency. With a maximum input voltage of 20 V, for some margin above 18
V, assuming a diode voltage of 0.5 V, inductor resistance of 100 m ? , switch resistance of 200m ? , a current limit
value of 2.7 A, the maximum switching frequency is approximately 2500kHz.
Choosing the lower of the two values and adding some margin a switching frequency of 1200 kHz is used. To
determine the timing resistance for a given switching frequency, use Equation 11 or the curve in Figure 40 .
9.2.2.2 Output Inductor Selection (L O )
K IND is a coefficient that represents the amount of inductor ripple current relative to the maximum output current.
The inductor ripple current will be filtered by the output capacitor. Therefore, choosing high inductor ripple
currents will impact the selection of the output capacitor since the output capacitor must have a ripple current
rating equal to or greater than the inductor ripple current. In general, the inductor ripple value is at the discretion
of the designer; however, the following guidelines may be used.
For designs using low ESR output capacitors such as ceramics, a value as high as K IND = 0.3 may be used.
When using higher ESR output capacitors, K IND = 0.2 yields better results. Since the inductor ripple current is
part of the PWM control system, the inductor ripple current should always be greater than 100 mA for
dependable operation. In a wide input voltage regulator, it is best to choose an inductor ripple current on the
larger side. This allows the inductor to still have a measurable ripple current with the input voltage at its
minimum.
For this design example, use K IND = 0.2 and the minimum inductor value is calculated to be 7.6 μ H. For this
design, a nearest standard value was chosen: 10 μ H. For the output filter inductor, it is important that the RMS
current and saturation current ratings not be exceeded. The RMS and peak inductor current can be found from
For this design, the RMS inductor current is 1.506 A and the peak inductor current is 1.62 A. The chosen
inductor is a MSS6132-103. It has a saturation current rating of 1.64 A and an RMS current rating of 1.9A.
As the equation set demonstrates, lower ripple currents will reduce the output voltage ripple of the regulator but
will require a larger value of inductance. Selecting higher ripple currents will increase the output voltage ripple of
the regulator but allow for a lower inductance value.
The current flowing through the inductor is the inductor ripple current plus the output current. During power up,
faults or transient load conditions, the inductor current can increase above the calculated peak inductor current
level calculated above. In transient conditions, the inductor current can increase up to the switch current limit of
the device. For this reason, the most conservative approach is to specify an inductor with a saturation current
rating equal to or greater than the switch current limit rather than the peak inductor current.
L O ( ) = ′
I OUT ′ K IND
V IN ( ) ′ f SW
min
V IN ( max ) - V OUT
V OUT
max
(28)
I RIPPLE =
V OUT ′ (V IN ( max ) - V OUT )
V IN ( max ) ′ L O ′ f SW
(29)
(
? OUT ′ V IN ( max ) - V OUT
I L ( ) = ( I OUT ) + ′ ?
V IN ( ) ′ L O ′ f SW
12 ?
?
+ RIPPLE
32
? V
2 1
rms
è
I
I L ( peak ) = I OUT
2
max
) ? ÷
÷
÷
2
(30)
(31)
Copyright ? 2012–2014, Texas Instruments Incorporated
Product Folder Links: TPS54160 TPS54160A
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| TPS54160ADRCT | 功能描述:直流/直流开关转换器 3.5-60Vin,1.5A SD 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 |
| TPS54160DGQ | 功能描述:直流/直流开关调节器 3.5-60V 1.5A Step Down SWIFT Converter 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 |
| TPS54160DGQG4 | 功能描述:直流/直流开关调节器 3.5-60V,1.5A Step Down SWIFT Converter 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 |
| TPS54160DGQR | 功能描述:直流/直流开关调节器 3.5-60V 1.5A Step Down SWIFT Converter 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 |
| TPS54160DGQRG4 | 功能描述:直流/直流开关调节器 3.5-60V,1.5A Step Down SWIFT Converter 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 |
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