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參數(shù)資料
| 型號： | L6731BTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | HTSSOP-16 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 439K |
| 代理商： | L6731BTR |
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L6731B
Summary description
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Summary description
The controller is an integrated circuit realized in BCD5 (BiCMOS-DMOS, version 5) fabrication
that provides complete control logic and protection for high performance step-down DC-DC and
niPOL converters.
It is designed to drive N-Channel MOSFETs in a synchronous rectified buck topology. The
output voltage of the converter can be precisely regulated down to 600mV with a maximum
tolerance of ±0.8%. If an external reference is used, it will be trasferred divided by 2 to the N.I.
input of the error-amplifier, in accordance to the DDR memory specifications.
An internal resistor divider and a voltage buffer allow to achieve an accuracy of 1% on both Vtt
and Vttref. It's possibile to provide an external reference from 0V to 2.5V in order to meet the
specification for DDRI and DDRII. The input voltage can range from 1.8V to 14V, while the
supply voltage can range from 4.5V to 14V. High peak current gate drivers provide for fast
switching to the external power section, and the output current can be in excess of 20A.
The PWM duty cycle can range from 0% to 100% with a minimum on-time (TON, MIN) lower than
100ns making possible conversions with very low duty cycle at high switching frequency. The
device provides voltage-mode control that includes a selectable frequency oscillator (250KHz
or 500KHz).
The error amplifier features a 10MHz gain-bandwidth-product and 5V/s slew-rate that permits
to realize high converter bandwidth for fast transient response. The device monitors the current
by using the RDS(on) of both the high-side and low-side MOSFET(s), eliminating the need for a
current sensing resistor and guaranteeing an effective over-current-protection in all the
application conditions.
When necessary, two different current limit protections can be externally set through two
external resistors. During the soft-start phase a constant current protection is provided while
after the soft-start the device enters in hiccup mode in case of over-current. The converter can
always sink current. Other features are Power-Good, not latched over-voltage-protection, feed-
back disconnection and thermal shutdown. The HTSSOP16 package allows the realization of
really compact DC/DC converters.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6731B | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6731D | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L9230-DIE1 | STEPPER MOTOR CONTROLLER, UUC |
| L9230 | STEPPER MOTOR CONTROLLER, PDSO20 |
| LA5680T | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6731D | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down 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 |
| L6731DTR | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down 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 |
| L6732 | 功能描述:DC/DC 開關(guān)控制器 Adjustable Step Down 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 |
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
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