- 您现在的位置：买卖IC网 > PDF目录69510 > TPS54162QPWPRQ1 (TEXAS INSTRUMENTS INC) 3 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PDSO20 PDF资料下载
参数资料
| 型号： | TPS54162QPWPRQ1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 22/41页 |
| 文件大小： | 2414K |
| 代理商： | TPS54162QPWPRQ1 |
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页当前第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
www.ti.com
SLVSA32C – OCTOBER 2009 – REVISED MAY 2010
9) Resistor to Select Switching Frequency (R8)
Please refer to the section Selecting Switching Frequency, Figure 23 and Equation 7.
10) Resistors to Select Output Voltage (R4, R5)
To minimize the effect of leakage current on the VSENSE terminal, the current flowing through the feedback
network should be greater than 5 mA to maintain output accuracy. Higher resistor values help improve the
converter efficiency at low output currents, but may introduce noise immunity problems (see Equation 1). It is
recommended to fix R4 to a standard value (say 187 k
) and calculate R5.
11) Resistors to Set Undervoltage, Overvoltage, and Reset Thresholds (R1, R2, R3)
Overvoltage resistor selection
Using Equation 12, the value of R3 can be determined to set the overvoltage threshold at up to 106% to 110% of
VReg. The sum of R1, R2, and R3 resistor network to ground should be is approximately 100 k .
Reset threshold resistor selection
Using Equation 11 the value of R2 + R3 can be calculated, and knowing R3 from the OV_TH setting, R2 can be
determined. Suggested value of reset threshold is 92% of VReg.
Undervoltage threshold for low-power mode and load transient operation
This threshold is set above the reset threshold to ensure the regulator operates within the specified tolerances
during output load transient of low load to high load and during discontinuous conduction mode. The typical
voltage threshold can be determined using Equation 10. Suggested value of undervoltage threshold is 95% of
VReg.
Low-Power Mode (LPM) Threshold
An approximation of the output load current at which the converter is operating in discontinuous mode can be
obtained from Equation 4 with ± 30% hysteresis. The values used in Equation 6 for minimum and maximum input
voltage will affect the duty cycle and the overall discontinuous mode load current. These are the nominal values,
and other factors are not taken into consideration like external component variations with temperature and aging.
12) Pullup Resistor for Enable (R12)
An external pull resistor of 30.1 k
is recommended to enable the device for operation.
13) Type 3 Compensation Components (R5, R6, R9, C5, C7, C8)
First, make the 'ZEROs' close to double pole frequency, using Equation 15, Equation 16, and Equation 14.
fz1 = (50% to 70%) fLC
fz2 = fLC
Second, make the 'POLEs' above the crossover frequency, using Equation 21 and Equation 22.
fp1 = fESR
fp2 = fsw
Resistors
From Equation 1, knowing VReg and R4 (fix to a standard value), R5 can be calculated as shown in Equation 45:
(45)
(46)
R9 can be calculated as shown in Equation 47:
Copyright 2009–2010, Texas Instruments Incorporated
29
Product Folder Link(s): TPS54162-Q1
相关PDF资料 |
PDF描述 |
|---|---|
| TPS5420DR | 5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5420D | 6.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS54226PWP | DUAL SWITCHING CONTROLLER, PDSO20 |
| TPS54226RGTT | DUAL SWITCHING CONTROLLER, PQCC16 |
| TPS54232DR | SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS5420 | 制造商:TI 制造商全称:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
| TPS54200DDCR | 功能描述:TPS54200DDCR 制造商:texas instruments 系列:* 零件状态:在售 标准包装:1 |
| TPS54200DDCT | 功能描述:IC REG BUCK 制造商:texas instruments 系列:- 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）:4.5V 电压 - 输入（最大值）:28V 电压 - 输出（最小值/固定）:-0.1V 电压 - 输出（最大值）:28V 电流 - 输出:1.5A 频率 - 开关:600kHz 同步整流器:是 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 供应商器件封装:TSOT-23-6 标准包装:1 |
| TPS54200EVM-818 | 功能描述:EVALUATION MODULE 制造商:texas instruments 系列:* 零件状态:在售 标准包装:1 |
| TPS54201DDCR | 功能描述:TPS54201DDCR 制造商:texas instruments 系列:* 零件状态:在售 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。