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参数资料
| 型号： | TLE6389G50-1 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 420 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | PLASTIC, DSO-14 |
| 文件页数： | 18/37页 |
| 文件大小： | 368K |
| 代理商： | TLE6389G50-1 |
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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).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 开关控制器 Step-Down DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体: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 - 专用 Combined Power Supply and Firing IC RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
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