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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 125K |
| 代理商： | TEA1211 |
2003 Oct 13
5
Philips Semiconductors
Preliminary specification
High efficiency auto-up/down
DC/DC converter
TEA1211HN
handbook, halfpage
G
S
L
S
L
L
G
L
I
S
I
S
I
F
O
O
n.c.
n.c.
GND
GND
LXA
LXA
IN
LXA
MDB002
GND
n.c.
GND
n.c.
LXB
LXB
OUT
LXB
2
1
3
4
5
6
7
1
1
1
1
1
1
1
9
2
2
2
2
2
3
3
3
8
24
23
21
22
20
19
18
17
TEA1211HN
Fig.2 Pin configuration.
This diagram is a bottom side view.
Pin 1 is indicated with a dot on the top side of the package.
For mechanical details of HVQFN32 package, see Chapter 12.
7
FUNCTIONAL DESCRIPTION
7.1
Introduction
The TEA1211HN is able to operate in Pulse Frequency
Modulation (PFM) or discontinuous conduction mode as
well as in Pulse Width Modulation (PWM) or continuous
conduction mode. All switching actions are completely
determined by a digital control circuit which uses the
output voltage level as control input. This digital approach
enables the use of a new pulse width and frequency
modulation scheme, which ensures optimum power
efficiency over the complete range of operation of the
converter.
7.2
Control mechanism
Depending on load current I
load
and V
IN
to V
OUT
ratio, the
controller chooses a mode of operation. When high output
power is requested, the device will operate in PWM
(continuous conduction) mode, which is a 2-phase cycle in
up- as well as in down mode. For small load currents the
controller will switch over to PFM (discontinuous mode),
which is either a 3- or 4-phase cycle depending on the
input to output ratio, see Fig.3.
handbook, halfpage
Icoil
MDB003
0
PWM
PFM
VIN
>
VOUT
down mode
VIN
=
VOUT
stationary mode
VIN
<
VOUT
up mode
Fig.3
Waveform of coil current as function of I
load
and V
IN
to V
OUT
ratio.
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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 |
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