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參數(shù)資料
| 型號： | L6710 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, PQFP44 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, TQFP-44 |
| 文件頁數(shù)： | 3/34頁 |
| 文件大?。?/td> | 1610K |
| 代理商： | L6710 |
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L6710
Figure 2. Drivers peak current: High Side (left) and Low Side (right).
CURRENT READING AND OVER CURRENT
The current flowing trough each phase is read using the voltage drop across the low side mosfets RdsON
or across a sense resistor (RSENSE) and internally converted into a current. The transconductance ratio is
issued by the external resistor Rg placed outside the chip between ISENx and PGNDS pins toward the
reading points.
The differential current reading rejects noise and allows to place sensing element in different locations
without affecting the measurement's accuracy. The current reading circuitry reads the current during the
time in which the low-side mosfet is on (OFF Time). During this time, the reaction keeps the pin ISENx
and PGNDS at the same voltage while during the time in which the reading circuitry is off, an internal clamp
keeps these two pins at the same voltage sinking from the ISENx pin the necessary current (Needed if
low-side mosfet RdsON sense is implemented to avoid absolute maximum rating overcome on ISENx pin).
The proprietary current reading circuit allows a very precise and high bandwidth reading for both positive
and negative current. This circuit reproduces the current flowing through the sensing element using a high
speed Track & Hold transconductance amplifier. In particular, it reads the current during the second half
of the OFF time reducing noise injection into the device due to the mosfet turn-on (See fig. 3). Track time
must be at least 200ns to make proper reading of the delivered current.
This circuit sources a constant 100
A current from the PGNDS pin: it must be connected through two
equal Rg resistors to the groundside of the sensing element (See Figure 3). The two current reading cir-
cuitry uses this pin as a reference keeping the ISENx pin to this voltage.
The current that flows in the ISENx pin is then given by the following equation:
Where RSENSE is an external sense resistor or the RdsON of the low side mosfet and Rg is the transcon-
ductance resistor used between ISENx and PGNDS pins toward the reading points; IPHASEx is the current
carried by the relative phase. The current information reproduced internally is represented by the second
term of the previous equation as follow:
CH3 = HGATE1; CH4 = HGATE2
CH3 = LGATE1; CH4 = LGATE2
I
ISEN x
50
A
R
SEN SE
I
PH AS Ex
R
g
------------------------------------------------
50
AI
IN FO x
+
=
+
=
I
IN FO x
R
SEN SE
I
PH AS Ex
R
g
------------------------------------------------
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6710TR | 2 A SWITCHING CONTROLLER, PQFP44 |
| L6713ATR | 2 A SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6716TR | DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48 |
| L6716 | DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48 |
| L6722 | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6710TR | 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6711 | 功能描述:DC/DC 開關(guān)控制器 3 PHASE 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 安裝風格: 封裝 / 箱體:CPAK |
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 開關(guān)控制器 3 PHASE 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 安裝風格: 封裝 / 箱體:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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