收藏本站
参数资料
型号： TPS40193DRCR
厂商： TEXAS INSTRUMENTS INC
元件分类： 稳压器
英文描述： SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO10
封装： 3 X 3 MM, GREEN, PLASTIC, SON-10
文件页数： 14/38页
文件大小： 707K
代理商： TPS40193DRCR
I
CHARGE +
V
OUT
C
OUT
T
SS
I
L(peak) + IOUT(max) )
1
2
I
RIPPLE ) ICHARGE
C
IN(min) +
I
LOAD
V
OUT
V
RIPPLE(cap)
V
IN
f
SW
ESR
MAX +
V
RIPPLE(esr)
I
LOAD )
1
2
I
RIPPLE
I
RMS(Cin) + IIN(rms) * IIN(avg) +
I
OUT )
1
12
I
RIPPLE
V
OUT
V
IN
*
V
OUT
I
OUT
V
IN
P
G1_SW +
1
2
V
IN
I
OUT
T
SW
f
SW +
1
2
V
IN
I
OUT
Q
GD1
V
DD*VTH
R
DRV
f
SW
TPS40192, TPS40193
www.ti.com
SLUS719C – MARCH 2007 – REVISED AUGUST 2010
Based on 178 mF of capacitance, 2.6-A ripple current, 600-kHz switching frequency and 36-mV ripple voltage,
calculate a capacitive ripple of 24.3 mV and a maximum ESR of 4.4 m
.
Two 1206 100-mF, 6.3-V X5R ceramic capacitors are selected to provide more than 178-mF of minimum
capacitance and less than 4.4 m
of ESR (2.5 m each).
Peak Current Rating of the Inductor
With output capacitance, it is possible to calculate the charge current during start-up and determine the minimum
saturation current rating for the inductor. The start-up charging current is approximated by Equation 12.
(12)
Using the TPS40192's minimum soft-start time of 3.0 ms, COUT = 240 mF and VOUT = 1.8 V, ICHARGE = 144 mA.
(13)
Table 4. Inductor Requirements
PARAMETER
SYMBOL
VALUE
UNITS
Inductance
L
1.0
mH
RMS current (thermal rating)
IL(rms)
10.03
A
Peak current (saturation rating)
IL(peak)
11.3
A PG0083.102 1.0-mH is selected for its small size, low DCR (6.6 m) and high current handling capability (12 A
thermal, 17 A saturation)
Input Capacitor Selection (C7)
The input voltage ripple is divided between capacitance and ESR. For this design VRIPPLE(cap) = 400 mV and
VRIPPLE(ESR) = 200 mV. The minimum capacitance and maximum ESR are estimated by Equation 14.
(14)
(15)
For this design CIN > 9.375 mF and ESR < 17.7 m . The RMS current in the input capacitors is estimated by
Equation 16.
(16)
For this design VIN = 14 V, VOUT = 1.8 V, IOUT=10 A and IRIPPLE = 2.6 A calculate an RMS of 2.37 A, so the total
of our input capacitors must support 2.37 A of RMS ripple current.
Two 1210 10-mF 25V X5R ceramic capacitors with about 2 m ESR and a 2-ARMS current rating are selected.
Higher voltage capacitors are selected to minimize capacitance loss at the DC bias voltage to ensure the
capacitors have sufficient capacitance at the working voltage.
MOSFET Switch Selection (Q1, Q2)
The switching losses for the high-side FET are estimated by Equation 17.
(17)
Copyright 2007–2010, Texas Instruments Incorporated
Submit Documentation Feedback
21
Product Folder Link(s): TPS40192 TPS40193
相关PDF资料
PDF描述
TPS40195RGYR SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PQCC16
TPS40195PWG4 SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16
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
相关代理商/技术参数
参数描述
TPS40193DRCRG4 功能描述:DC/DC 开关控制器 4.5V-18V Input Synch 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
TPS40193DRCT 功能描述:DC/DC 开关控制器 4.5V-8V Input Synch Buck Contr 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
TPS40193DRCT 制造商:Texas Instruments 功能描述:; Leaded Process Compatible:Yes; Peak Re 制造商:Texas Instruments 功能描述:IC, SYNC BUCK CONTROLLER, SON-10
TPS40193DRCTG4 功能描述:DC/DC 开关控制器 4.5V-18V Input Synch 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
TPS40193EVM-001 功能描述:电源管理IC开发工具 TPS40193 Evaluation Module RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*