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| 型号： | TPS65250RHAR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封装： | 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40 |
| 文件页数： | 8/38页 |
| 文件大小： | 1782K |
| 代理商： | TPS65250RHAR |
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Vin=12V
BUCK3 Line driver
BUCK3
PUMP
(Regulates up to 2Vin-1.5
+
DUMP
adjustable 7.5-15.1V
BUCK2
BUCK1
BUCK2 I/O
BUCK1 SYS
LDOs
Always ON
PGOOD monitor
3.3V
6.5V
PGOOD
GASP monitor
GASP
SLVSAA3B – JUNE 2010 – REVISED JANUARY 2011
www.ti.com
TYPICAL APPLICATION CIRCUIT FOR ADSL SYSTEM AND COMPONENT SELECTION
The TPS65250 has been devised to optimize the power train of xDSL applications. Figure 29 shows a simplified
block diagram.
Figure 29. TPS65250 Main Blocks
TPS65250 has several features that improve and simplify the power stage design including a unique storage and
release circuit optimized for reduction of storage capacitance needed in dying gasp mode, as well as a low
power mode. Table 1 shows the advantages of its usage.
Table 1. Storage and Release Circuit Advantages
FEATURE
ADVANTAGE
System can operate with a 12-V adapter keeping the storage features
System can run with a12-V adapter instead of bulky and expensive
of a higher storage voltage.
22 V.
Storage capacitors are separated from the input supply minimizing
Converters run from 12 V allowing for improved efficiency and
stresses during normal operation.
performance compared to converters operating from 22 V.
Storage capacitors are charged with a controlled inrush free circuit
from the adaptor supply to a selected storage voltage as high as [2VIN Reduced stresses on AC adapter, reduced inrush current
- 1.5 V].
If the input voltage drops below a selected release voltage, charge
from the storage capacitors is transferred to the input stage
Controlled voltage release during dump operation
keeping the input voltage closer to release value for as long as
possible.
Storage and release circuitry is completely on chip except for the
Reduced number of parts
charge and storage capacitors.
Circuit features a flag signal issued to indicate that the dump stage
Self-contained pump and dump signaling
is in process. Can be used to signal the host processor to start a
load reduction process.
Enable pins allow for immediate start-up, for accurate sequencing
Enable input pins for start-up and sequencing
add a capacitor to the enable pins.
16
Copyright 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS65250
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相关代理商/技术参数 |
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|---|---|
| TPS65250RHAT | 功能描述:PMIC 解决方案 PMU w/3 DC/DC Cnvrtr & Charge & Pump RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS652510EVM | 功能描述:电源管理IC开发工具 TPS652510 Eval Mod 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 |
| TPS652510RHAR | 功能描述:PMIC 解决方案 3 DC-DC Converters RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS652510RHAT | 功能描述:PMIC 解决方案 3 DC-DC Converters RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| TPS65251-1RHAT | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 3A, 2A 40-VFQFN Exposed Pad 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:3 电压 - 输入（最小值）:4.5V 电压 - 输入（最大值）:18V 电压 - 输出（最小值/固定）:0.8V 电压 - 输出（最大值）:17V 电流 - 输出:3A，2A 频率 - 开关:300kHz ~ 2.2MHz 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:40-VFQFN 裸露焊盘 供应商器件封装:40-VQFN（6x6） 标准包装:1 |
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