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參數資料
| 型號： | LM5642 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization |
| 中文描述： | 高電壓，雙同步降壓轉換器振蕩器同步 |
| 文件頁數： | 3/24頁 |
| 文件大小： | 667K |
| 代理商： | LM5642 |
Pin Descriptions
(Continued)
Rds of the top MOSFET is used for current sensing, connect
this pin to the source of the top MOSFET. Always use a
separate trace to form a Kelvin connection to this pin.
SW2 (Pin 16):
Switch-node connection for Channel 2, which
is connected to the source of the top MOSFET of Channel 2.
It serves as the negative supply rail for the top-side gate
driver, HDRV2.
HDRV2 (Pin 17):
Top-side gate-drive output for Channel 2.
HDRV is a floating drive output that rides on the correspond-
ing switching-node voltage.
CBOOT2 (Pin 18):
Bootstrap capacitor connection. It serves
as the positive supply rail for the Channel 2 top-side gate
drive. Connect this pin to VDD2 (Pin 19) through a diode,
and connect the low side of the bootstrap capacitor to SW2
(Pin16).
VDD2 (Pin 19):
The supply rail for the Channel 2 low-side
gate drive. Connected to VLIN5 (Pin 7) through a 4.7
resistor and bypassed to power ground with a ceramic ca-
pacitor of at least 1μF. Tie this pin to VDD1 (Pin 24).
LDRV2 (Pin 20):
Low-side gate-drive output for Channel 2.
PGND (Pin 21):
The power ground connection for both
channels. Connect to the ground rail of the system.
VIN (Pin 22):
The power input pin for the chip. Connect to
the positive (+) input rail of the system. This pin must be
connected to the same voltage rail as the top FET drain (or
the current sense resistor when used).
LDRV1 (Pin 23):
Low-side gate-drive output for Channel 1.
VDD1 (Pin 24):
The supply rail for Channel 1 low-side gate
drive. Tie this pin to VDD2 (Pin 19).
CBOOT1 (Pin 25):
: Bootstrap capacitor connection. It
serves as the positive supply rail for Channel 1 top-side gate
drive. See CBOOT2 (Pin 18).
HDRV1 (Pin 26):
Top-side gate-drive output for Channel 1.
See HDRV2 (Pin 17).
SW1 (Pin 27):
Switch-node connection for Channel 1. See
SW2 (Pin16).
RSNS1 (Pin 28):
The negative (-) Kelvin sense for the
internal current sense amplifier of Channel 1. See RSNS2
(Pin 15).
L
www.national.com
3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM5642_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization |
| LM5642EVAL-KIT | 功能描述:BOARD EVALUATION LM5642 RoHS:否 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM5642EVAL-KIT/NOPB | 功能描述:電源管理IC開發工具 LM5642 EVAL KIT RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM5642MH | 制造商:Texas Instruments 功能描述: |
| LM5642MH/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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