参数资料
型号: TPS54160ADRCR
厂商: Texas Instruments
文件页数: 28/55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:
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)
SLVSB56C – MAY 2012 – REVISED FEBRUARY 2014
Feature Description (continued)
8.3.21 Simple Small Signal Model for Peak Current Mode Control
Figure 48 describes a simple small signal model that can be used to understand how to design the frequency
compensation. The TPS54160A power stage can be approximated to a voltage-controlled current source (duty
cycle modulator) supplying current to the output capacitor and load resistor. The control to output transfer
function is shown in Equation 14 and consists of a dc gain, one dominant pole, and one ESR zero. The quotient
of the change in switch current and the change in COMP pin voltage (node c in Figure 47 ) is the power stage
transconductance. The gm PS for the TPS54160A is 6 A/V. The low-frequency gain of the power stage frequency
response is the product of the transconductance and the load resistance as shown in Equation 15 .
As the load current increases and decreases, the low-frequency gain decreases and increases, respectively. This
variation with the load may seem problematic at first glance, but fortunately the dominant pole moves with the
load current (see Equation 16 ). The combined effect is highlighted by the dashed line in the right half of
Figure 48 . As the load current decreases, the gain increases and the pole frequency lowers, keeping the 0-dB
crossover frequency the same for the varying load conditions which makes it easier to design the frequency
compensation. The type of output capacitor chosen determines whether the ESR zero has a profound effect on
the frequency compensation design. Using high ESR aluminum electrolytic capacitors may reduce the number
frequency compensation components needed to stabilize the overall loop because the phase margin increases
from the ESR zero at the lower frequencies (see Equation 17 ).
V O
VC
Adc
R ESR
fp
R L
gm ps
C OUT
fz
Figure 48. Simple Small Signal Model and Frequency Response for Peak Current Mode Control
V OUT
V C
= Adc ′
? s ?
? 1 + ÷
? s ?
? 1 + ÷
è 2 p ′ f Z ?
è 2 p ′ f P ?
(14)
Adc = gm ps ′ R L
(15)
C OUT ESR ′ 2 p
f P =
f Z =
1
C OUT ′ R L ′ 2 p
1
′ R
(16)
(17)
28
Copyright ? 2012–2014, Texas Instruments Incorporated
Product Folder Links: TPS54160 TPS54160A
相关PDF资料
PDF描述
TPS54240QDGQRQ1 IC REG BUCK ADJ 2.5A 10MSOP
TPS54260DRCR IC REG BUCK ADJ 2.5A 10SON
TPS54326RGTT IC REG BUCK SYNC ADJ 3A 16QFN
TPS54478RTER IC REG BUCK SYNC ADJ 4A 16WQFN
TPS54550PWPG4 IC REG BUCK SYNC ADJ 6A 16HTSSOP
相关代理商/技术参数
参数描述
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