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參數(shù)資料
| 型號(hào)： | TLE6389G50-1 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 420 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, DSO-14 |
| 文件頁數(shù)： | 17/37頁 |
| 文件大小： | 368K |
| 代理商： | TLE6389G50-1 |
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TLE 6389
Preliminary data sheet Rev. 1.0
24
2003-05-05
6
Detailed circuit description
In the following, some internal blocks of the TLE6389 are described in more detail. For
the right choice of the external components please refer to the section application
infomation.
6.1
PFM/PWM Step-down regulator
To meet the strict requirements in terms of current consumption demanded by all Body-
and 42V PowerNet applications a special PFM (Pulse Frequency Modulation) - PWM
(Pulse Width Modulation) control scheme for highest efficiency is implemented in the
TLE6389 regulators. Under light load conditions the output voltage is able to increase
slightly and at a certain threshold the controller jumps into PFM mode. In this PFM
operation the PMOS is triggered with a certain on time (depending on input voltage,
output voltage, inductance- and sense resistor value) whenever the buck output voltage
decreases to the so called WAKE-threshold. The switching frequency of the step down
regulator is determined in the PFM mode by the load current. It increases with increasing
load current and turns finally to the fixed PWM frequency at a certain load current
depending on the input voltage, current sense resistor and inductance. The diagram
below shows the buck regulation circuit of the TLE6389 .
Figure 1
Buck control scheme
The TLE6389 uses a slope-compensated peak current mode PWM control scheme in
which the feedback or output voltage of the step down cirucit and the peak current of the
current through the PMOS are compared to form the OFF signal for the external PMOS.
VREF
VFB
VS
BDS
GDRV
Current-
sense
Amplifier
+
MUX
CS
VS
Error
Amplifier
PWM
Comparator
Slope-
compensation
Blanking
R
S
Q
+-
+
-
>1
&
+-
Over-
Voltage
Lockout
Over-
Temp.
Shutdown
VREF
VFB, OV
VREF
VDIODE
-
+
Wake-
Comparator
VREF
VFB, WK
Oscillator
SYNC
MODE
Level-
shift
PFM
PWM
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE6389G501NTMA1 | 制造商:Infineon Technologies AG 功能描述:DC DC Cntrlr Single-OUT Step Down 5V to 60V Input 14-Pin DSO 制造商:Infineon Technologies AG 功能描述:IC REG BUCK BOOST 5V 3A PDSO14 |
| TLE6389G50NTMA1 | 制造商:Infineon Technologies AG 功能描述:DC DC Cntrlr Single-OUT Step Down 5V to 60V Input 14-Pin DSO 制造商:Infineon Technologies AG 功能描述:IC REG BUCK BOOST 5V 3A PDSO14 |
| TLE6389GV | 功能描述:DC/DC 開關(guān)控制器 Step-Down DC/DC Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TLE6389GVT | 制造商:Infineon Technologies AG 功能描述:DC DC Cntrlr Single-OUT Step Down 5V to 60V Input 14-Pin DSO T/R |
| TLE6710Q | 功能描述:接口 - 專用 Combined Power Supply and Firing IC RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
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