參數(shù)資料
型號(hào)： TLE6711
廠商： INFINEON TECHNOLOGIES AG
英文描述： Multifunctional Voltage Regulator and Watchdog
中文描述： 多功能穩(wěn)壓器和看門(mén)狗
文件頁(yè)數(shù)： 16/28頁(yè)
文件大?。?/td> 265K
代理商： TLE6711
TLE 6711
Circuit Description
Data Sheet V 2.22
16
2001-04-23
2.3
Boost Converter
The TLE 6711 contains a fully integrated boost converter (except the boost-diode),
which provides a supply voltage for an energy reserve e.g. an airbag firing system. The
regulated boost output voltage
V
BOOST
is programmable by a divider network (external
resistors) providing the feedback voltage for the boost feedback pin BOFB. The energy
which is stored in the external electrolytic capacitor at
V
BOOST
guarantees accurate
airbag firing, even if the battery is disconnected by a car crash.
The boost inductance
L
BO
(typ. 100
μ
H) is PWM-switched by an integrated current
limited power DMOS transistor with a programmable (external resistor
R
R
) frequency.
An internal bandgap reference provides a temperature independent, on chip trimmed
reference voltage for the regulation loop. An error amplifier compares the reference
voltage with the boost feedback signal
V
BOFB
from the external divider network
(determination of the output boost voltage
V
BOOST
).
Application note for programming the output voltage at pin
V
BOOST
:
With a PWM (Pulse Width Modulation) comparator the output of the error amplifier is
compared to a periodic linear ramp, provided by a sawtooth signal of the oscillator
connected to pin R. A logic signal with variable pulse width is generated. It passes
through the logic circuits (sets the output latch PWM-FF) and driver circuits to the power
switching DMOS. The Schmitt-trigger output resets the output flip-flop PWM-FF by
NOR 2. The PWM signal is gated by the NAND 2 to guarantee a dominant reset.
V
BOOST
V
BOFBTH
R
------------------------------------
R
+
(
)
R
BO2
×
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLE6711_07 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Multifunctional Voltage Regulator and Watchdog
TLE6711G 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 MULTIFUNCTIONAL VOLT REGULATOR/WATCHDOG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TLE6711GL 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Multifunctional Volt Regulator & Watchdog RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TLE6711GLXUMA1 制造商:Infineon Technologies AG 功能描述:Multifunctional Voltage Regulator and Watchdog 20-Pin DSO 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC REG BUCK BOOST ADJ DSO20
TLE6711GXUMA1 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC REG BUCK BOOST ADJ PDSO14
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