- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383238 > L6911D (意法半導(dǎo)體) 5 BIT PROGRAMMABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION PDF資料下載
參數(shù)資料
| 型號： | L6911D |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 5 BIT PROGRAMMABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| 中文描述： | 5位可編程降壓控制器采用同步整流 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大?。?/td> | 233K |
| 代理商： | L6911D |
L6911D
6/17
V
CC
= 12V
V
CC
= 5V
Switching frequency variations vs. R
T
are reported in Fig.1.
Note that forcing a 50
μ
A current into this pin, the device stops switching because no current is delivered to the
oscillator.
Figure 1.
Digital to Analog Converter
The built-in digital to analog converter allows the adjustment of the output voltage from 1.30V to 2.05V with
50mV binary steps and from 2.10V to 3.50V with 100mV binary steps as shown in the previous table 1. The
internal reference is trimmed to ensure the precision of 1%.
The internal reference voltage for the regulation is programmed by the voltage identification (VID) pins. These
are TTL compatible inputs of an internal DAC that is realized by means of a series of resistors providing a par-
tition of the internal voltage reference. The VID code drives a multiplexer that selects a voltage on a precise
point of the divider. The DAC output is delivered to an amplifier obtaining the V
PROG
voltage reference (i.e. the
set-point of the error amplifier). Internal pull-ups are provided (realized with a 5
μ
A current generator); in this
way, to program a logic "1" it is enough to leave the pin floating, while to program a logic "0" it is enough to short
the pin to GND.
The voltage identification (VID) pin configuration also sets the power-good thresholds (PGOOD) and the over-
voltage protection (OVP) thresholds.
The VID code "11111" disable the device (as a short on the SS pin) and no output voltage is regulated.
Soft Start and Inhibit
At start-up a ramp is generated charging the external capacitor C
SS
by means of a 10μA constant current, as
shown in figure 1.
When the voltage across the soft start capacitor (V
SS
) reaches 0.5V the lower power MOS is turned on to dis-
f
S
200kHz
7
R
T
k
(
)
----------------------------
+
=
f
S
200kHz
7
R
T
k
(
)
--------------------
+
=
10
100
1000
Frequency [kHz]
10
100
1000
10000
R
RT to GND
RT to VCC=12V
RT to VCC=5V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6911DTR | 5 BIT PROGRAMMABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| L6918 | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918A | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918AD | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
| L6918ADTR | 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6911DTR | 功能描述:DC/DC 開關(guān)控制器 5-Bit Prog Step-Down 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 |
| L6911E | 功能描述:DC/DC 開關(guān)控制器 5-Bit Prog Step-Down 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 |
| L6911E_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5-Bit programmable step down controller with synchronous rectification |
| L6911ETR | 功能描述:DC/DC 開關(guān)控制器 5B PROGRAMMABLE 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 |
| L6912-2 | 制造商:Thomas & Betts 功能描述:1/2 CORD GRIP CONNECTOR,2/BG |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。