- 您現在的位置：買賣IC網 > PDF目錄98246 > TLE6389GVT (INFINEON TECHNOLOGIES AG) SWITCHING CONTROLLER, 420 kHz SWITCHING FREQ-MAX, PDSO14 PDF資料下載
參數資料
| 型號： | TLE6389GVT |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 420 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, DSO-14 |
| 文件頁數： | 18/37頁 |
| 文件大?。?/td> | 368K |
| 代理商： | TLE6389GVT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
TLE 6389
Preliminary data sheet Rev. 1.0
25
2003-05-05
The ON-trigger is set periodically by the internal oscillator when acting in PWM mode
and is given by the output of the WAKE-comparator when operating in PFM mode. The
Multiplexer (MUX) is switched by the output of the MODE-detector which distinguishes
between PFM and PWM by tracking the output voltage (goto PFM) and by tracking the
gate trigger frequency (goto PWM). In PFM mode the peak current limit is reduced to
prevent overshoots at the output of the buck regulator. In order to avoid a gate turn off
signal due to the current peak caused by the parasitric capacitance of the catch diode
the blanking filter is necessary. The blanking time is set internally to 200ns and
determines (together with the PMOS turn on and turn off delay) the minimum duty cycle
of the device. In addition to the PFM/PWM regulation scheme an overvoltage lockout
and thermal protection are implemented to guarantee safe operation of the device and
of the supplied application circuit.
6.2
Battery voltage sense
To detect undervoltage conditions at the battery a sense comparator block is available
within the TLE6389. The voltage at the SI input is compared to an internal reference of
typ. 1.25V. The output of the comparator drives a NMOS structure giving a low signal at
SO as soon as the voltage at SI decreases below this threshold. In the 5V fixed version
an internal pull up resistor is connected from the drain of the NMOS to the output of the
buck converter, in the variable version SO is open drain.
The sense in voltage divider can be switched to high impedance by a low signal at the
SI_ENABLE to avoid high current consumption to GND (TLE6389G50-1 and
TLE6389G50 only).
Of course the sense comparator can be used for any input voltage and does not have to
be used for the battery voltage sense only.
6.3
Undervoltage Reset
The output voltage is monitored continously by the internal undervoltage reset
comparator. As soon as the output voltage decreases below the thresholds given in the
characteristics the NPN structure pulls RO low (latched). In the 5V fixed version an
internal pull up resistor is connected from the collector of the NPN to the output of the
buck converter, in the variable version RO is open collector.
At power up RO is kept low until the the output voltage has reached its reset threshold
and stayed above this threshold for the power on reset delay time. This delay time can
be determined by the appropriate choice of the external delay capacitance (see
application information).
相關PDF資料 |
PDF描述 |
|---|---|
| TLE6711G | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14 |
| TLE7209R | STEPPER MOTOR CONTROLLER, PDSO20 |
| TLE7824G | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| TLE8201R | SPECIALTY CONSUMER CIRCUIT, PDSO36 |
| TLE8242-2 | SPECIALTY ANALOG CIRCUIT, PQFP64 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TLE6710Q | 功能描述:接口 - 專用 Combined Power Supply and Firing IC RoHS:否 制造商:Texas Instruments 產品類型: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 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| TLE6710QNUMA1 | 制造商:Infineon Technologies AG 功能描述:Firing Circuit 64-Pin MQFP 制造商:Infineon Technologies AG 功能描述:AIRBAG_RESTRAINT_IC - Tape and Reel |
| TLE6711 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Multifunctional Voltage Regulator and Watchdog |
| 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/直流開關調節器 MULTIFUNCTIONAL VOLT REGULATOR/WATCHDOG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發布緊急采購，3分鐘左右您將得到回復。