參數(shù)資料
型號(hào)： TEA1211
廠商： NXP Semiconductors N.V.
英文描述： High efficiency auto-up/down DC/DC converter
中文描述： 高效率auto-up/down直流/直流轉(zhuǎn)換器
文件頁(yè)數(shù)： 7/23頁(yè)
文件大?。?/td> 125K
代理商： TEA1211
2003 Oct 13
7
Philips Semiconductors
Preliminary specification
High efficiency auto-up/down
DC/DC converter
TEA1211HN
handbook, full pagewidth
MDB005
maximum positive spread of VFB
Vh
maximum negative spread of VFB
typical situation
lower specification limit
upper specification limit
+
4%
4%
2%
VOUT (typ.)
Vh
Vl
2%
Vl
Vh
Vl
2%
Fig.5 Spread of location of output voltage window.
V
h
= High window limit
V
l
= Low window limit
7.2.3
S
WITCHING SEQUENCE
Refer to Figures 1 and 3. In up-mode the cycle starts by
making P-down and N-up conducting in the first phase.
The second phase N-up opens and P-up starts
conducting. In down-mode the cycle starts with in the first
phase P-up and P-down conducting. The second phase
P-down opens and N-down starts conducting. In PFM
these two phases are followed by a third or wait phase that
opens all switches except for N-down, which is closed to
prevent the coil from floating.
The stationary mode or 4-phase cycle, which only occurs
in PFM, starts with in the first phase P-down and N-up
conducting. In the second phase P-down and P-up
conduct forming a short-cut from battery to output
capacitor. In the third phase P-up and N-down conduct.
The fourth or wait-phase again opens all switches except
for N-down which is closed to prevent the coil from floating.
7.3
Adjustable output voltage
TheoutputvoltageoftheTEA1211HNcanbesettoafixed
value by means of an external resistive divider. After
start-up through this divider, dynamic control of the output
voltage is made possible by use of an I
2
C-bus. The output
voltage can be programmed from 1.5 V to 5.5 V in
40 steps of 0.1 V each. In case of Power Amplifiers (PAs)
for example the output voltage of the TEA1211HN can be
adjusted to the output power to be transmitted by the PA,
in order to obtain maximum system efficiency.
7.4
Start-up
If the input voltage exceeds the start voltage, the
TEA1211HN starts ramping up the voltage at the output
capacitor. Ramping stops when the target level, set by the
external resistors, is reached.
7.5
Under voltage lockout
As a result of too high load or disconnection of the input
power source, the input voltage can drop too low to
guarantee normal regulation. In that case, the device
switches to a shut-down mode stopping the switching
completely. Start-up is possible by crossing the start-up
level again.
7.6
Shut-down
When pin SHDWN is made HIGH, the converter disables
all switches except for N-down (see Fig.1) and power
consumption is reduced to a few
μ
A. N-down is kept
conducting to prevent the coil from floating.
7.7
Power switches
The power switches in the IC are two N-type and two
P-type MOSFETs, having a typical pin-to-pin resistance of
85 m
. The maximum continuous input/output current in
the switches is 1.7 A at 70
°
C ambient temperature.
相關(guān)PDF資料
PDF描述
TEA1211HN High efficiency auto-up/down DC/DC converter
TEA1501 Greeny; GreenChip(GreenChip系列芯片)
TEA1504 GreenChip SMPS control IC(SMP控制的GreenChip系列芯片)
TEA1566J GreenChip; SMPS module
TEA1566 GreenChip; SMPS module
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1211HN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:High efficiency auto-up/down DC/DC converter
TEA1330 制造商:FCI 制造商全稱:First Components International 功能描述:DUAL LOW-VOLTAGE POWER AMPLIFIER
TEA1401T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Power plug for the universal mains
TEA1402/N2,112 功能描述:電池管理 TEA1402/DIP18/TUBE-B RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
TEA1501 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Greeny; GreenChip
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*