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參數(shù)資料
| 型號： | L6917B |
| 廠商： | 意法半導體 |
| 英文描述： | 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER |
| 中文描述： | 5位可編程雙相控制器 |
| 文件頁數(shù)： | 22/27頁 |
| 文件大?。?/td> | 411K |
| 代理商： | L6917B |
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L6917
22/27
Figure 16. PCB and Components Layouts
DesignExample.
I
Output Voltage (nominal) 1.700V
I
Output Current (nominal) 45A
I
Static tolerance
+100mV; -50mV
Considering the high slope for the load transient, a high switching frequency has to be used. In addition to fast
reaction, this helps in reducing output and input capacitor. Inductance value is also reduced.
A switching frequency of 300kHz for each phase is then considered allowing large bandwidth for the compen-
sation network.
I
Current Reading Network and Over Current:
Since the maximum output current is 45A, the over current threshold has to be set at 140% of the
maximum nominal current, the over-current threshold has then to be setat 31.5A. Considering to sense
the output current across the low-side mosfet RdsON, STB90NF03L has 6.5m
max at 25
°
that
becomes 9.1m
considering the temperature variation (+40%); the resulting transconductance resistor
Rg has to be:
I
RdsON
35
μ
35
μ
(R3 to R6)
I
Droop function Design:
Considering a voltage drop of 100mV at full load, the feedback resistor RFB has to be
(R7)
voltage drop at OCP threshold results in 140mV.
Internal SGND Plane
Solder Side
Rg
---------------------------------------
------------------------------
8.2k
=
=
=
R
FB
50
μ
A
-------------------
2k
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6917BD | 功能描述:DC/DC 開關(guān)控制器 Prog Dual-Phase Cont 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 |
| L6917BDTR | 功能描述:DC/DC 開關(guān)控制器 Prog Dual-Phase Cont 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 |
| L6917D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| L6917DTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| L6918 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER |
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