- 您现在的位置：买卖IC网 > PDF目录383337 > MAX1813EEI (MAXIM INTEGRATED PRODUCTS INC) Dynamically-Adjustable, Synchronous Step-Down Controller with Integrated Voltage Positioning PDF资料下载
参数资料
| 型号： | MAX1813EEI |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Dynamically-Adjustable, Synchronous Step-Down Controller with Integrated Voltage Positioning |
| 中文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | 0.150 INCH, 0.025 INCH PITCH, QSOP-28 |
| 文件页数： | 15/38页 |
| 文件大小： | 738K |
| 代理商： | MAX1813EEI |
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页当前第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页第32页第33页第34页第35页第36页第37页第38页
M
Dynamically-Adjustable, Synchronous Step-Down
Controller with Integrated Voltage Positioning
______________________________________________________________________________________
15
(Figure 2). This architecture relies on the output ripple
voltage to provide the PWM ramp signal. Thus, the out-
put filter capacitor
’
s equivalent series resistance (ESR)
acts as a feedback resistor. The control algorithm is
simple: the high-side switch on-time is determined sole-
ly by a one-shot whose period is inversely proportional
to input voltage and directly proportional to output volt-
age (see
On-Time One-Shot
). Another one-shot sets a
minimum off-time (400ns typ). The on-time one-shot is
triggered if the error comparator is low, the low-side
switch current is below the current-limit threshold, and
the minimum off-time one-shot has timed out.
On-Time One-Shot (TON)
The heart of the PWM core is the one-shot that sets the
high-side switch on-time. This fast, low-jitter, adjustable
one-shot includes circuitry that varies the on-time in
response to the input and output voltages. The high-
side switch on-time is inversely proportional to V+ and
directly proportional to the output voltage as set by the
DAC code. This algorithm results in a nearly constant
switching frequency despite the lack of a fixed-frequen-
cy clock generator. The benefits of a constant switch-
ing frequency are twofold: first, the frequency can be
selected to avoid noise-sensitive regions such as the
455kHz IF band; second, the inductor ripple-current
operating point remains relatively constant, resulting in
COMPONENT
CIRCUIT 1
(FIGURE 1)
Output Voltage
Input Voltage Range
Maximum Load Current
0.6V to 1.75V
7V to 24V
22A
Inductor
0.68
μ
H
Sumida CDEP134H-0R6 or
Panasonic ETQP6F0R6BFA
Frequency
300kHz (TON = float)
High-Side MOSFET
International Rectifier
(2) IRF7811A
Low-Side MOSFET
Fairchild (3) FDS7764A or
International Rectifier
(3) IRF7822A
Input Capacitor
(6) 10
μ
F, 25V
Taiyo Yuden TMK432BJ106 or
TDK C4532X5R1E106M
Output Capacitor
(6) 220
μ
F
Panasonic
EEFUE0E221R
Current-Sense Resistor
1.5m
Dale WSL 2512, plus
0.5m
copper PC board trace
V
CC
(Default)
ILIM Level
Voltage-Positioning Gain
Resistor
150k
M A NUF ACT URER
PH ONE
[ C OUN TRY
CO DE]
WEBSITE
MOSFETs
Fairchild
Semiconductor
[1] 888-
522-5372
www.fairchildsemi.com
International
Rectifier
[1] 310-
322-3331
www.irf.com
Siliconix
[1] 203-
268-6261
www.vishay.com
Capacitors
Kemet
[1] 408-
986-0424
www.kemet.com
Panasonic
[1] 847-
468-5624
www.panasonic.com
Sanyo
[ 65] 281-
3226
( S ng ap or e)
[ 1] 408-
749- 9714
www.secc.co.jp
Taiyo Yuden
[03] 3667-
3408
(Japan)
[1] 408-
573-4150
www.t-yuden.com
Inductors
Coilcraft
[1] 800-
322-2645
www.coilcraft.com
Coiltronics
[1] 561-
752-5000
www.coiltronics.com
Sumida
[1] 408-
982-9660
www.sumida.com
Table 1. Component Selection for
Standard Applications
Table 2. Component Suppliers
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1813 | Replaced by TMS320VC5506 : Digital Signal Processors 144-LQFP |
| MAX182AEWI | Calivrated 4-Channel 12-Bit ADC with T/H and Refernce |
| MAX182AEPI | Calivrated 4-Channel 12-Bit ADC with T/H and Refernce |
| MAX182BEPI | Calivrated 4-Channel 12-Bit ADC with T/H and Refernce |
| MAX182ACPI | Replaced by TMS320BC52 : Digital Signal Processors 100-LQFP -40 to 85 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1813EEI+ | 功能描述:DC/DC 开关控制器 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 |
| MAX1813EEI+T | 功能描述:DC/DC 开关控制器 Dynamically Adjustable Synchronous Step-Down Controller w/Integrated Voltage Positioning 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 |
| MAX1813EEI-T | 功能描述:DC/DC 开关控制器 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 |
| MAX1813EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1813 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 |
| MAX1813XR46+ | 制造商:Maxim Integrated Products 功能描述: |
发布紧急采购，3分钟左右您将得到回复。