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參數資料
| 型號： | SC4614MSTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | 500kHz Voltage Mode PWM Controller |
| 中文描述： | 500kHz的電壓模式PWM控制器 |
| 文件頁數： | 1/14頁 |
| 文件大?。?/td> | 408K |
| 代理商： | SC4614MSTRT |
POWER MANAGEMENT
Description
1
www.semtech.com
SC4614
500kHz Voltage Mode PWM Controller
Features
Applications
January 16, 2007
Typical Application Circuit
The SC4614 is a high-speed, voltage mode PWM con-
troller that provides the control and protection features
necessary for a synchronous buck converter.
The SC4614 is designed to directly drive the top and
bottom MOSFETs of the buck converter. It allows the con-
verter to operate at 500kHz switching frequency with
4V to 25V power rail and as low as 0.5V output. It uses
an internal 8.2V supply as the gate drive voltage for mini-
mum driver power loss and MOSFET switching loss.
The SC4614 features soft-start, supply power under volt-
age lockout, and hiccup mode over current protection.
The SC4614 monitors the output current by using the
Rdson of the bottom MOSFET in the buck converter that
eliminates the need for a current sensing resistor. The
SC4614 is offered in a MSOP-10 package.
500kHz switching frequency
4V to 25V power rails
0.5V voltage reference for programmable output
voltages
Internal LDO for optimum gate drive voltage
1.5A gate drive current
Adaptive non-overlapping gate drives provide
shoot-through protection for MOSFETs
Internal soft start
Hiccup mode short circuit protection
Power rail under voltage lockout
MSOP-10 package, fully RoHS and WEEE compliant
Embedded, low cost, high efficiency converters
Point of load power supplies
Set top box power supplies
PDP/TFT TVs
Consumer electronics
12V IN
1
2
1.5V OUT
SC4614
1
2
3
4
7
8
9
10
5
6
BST
OCS
COMP
FB
VCC
DL
PN
DH
GND
DRV
+
+
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC46166 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:300mA ,500KHZ HIGH EFFICIENCY STEP-UP DC/DC CONVERTER |
| SC46166S | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:300mA ,500KHZ HIGH EFFICIENCY STEP-UP DC/DC CONVERTER |
| SC4620 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator |
| SC4620_08 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Input Voltage, High Efficiency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator |
| SC46208 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:1.25MHz, 600mA, HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN DC-DC CONVERTER |
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