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MIC4421ABM 参数 Datasheet PDF下载

MIC4421ABM图片预览
型号: MIC4421ABM
PDF下载: 下载PDF文件 查看货源
内容描述: 高的峰值输出电流: 9A峰值(典型值) [High peak-output current: 9A Peak (typ.)]
分类和应用: 驱动器接口集成电路光电二极管
文件页数/大小: 13 页 / 394 K
品牌: MIC [ MIC GROUP RECTIFIERS ]
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MIC4421A/4422A
9A Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4421A and MIC4422A MOSFET drivers are rugged,
efficient, and easy to use. The MIC4421A is an inverting
driver, while the MIC4422A is a non-inverting driver.
Both versions are capable of 9A (peak) output and can
drive the largest MOSFETs with an improved safe
operating margin. The MIC4421A/4422A accepts any logic
input from 2.4V to V
S
without external speed-up capacitors
or resistor networks. Proprietary circuits allow the input to
swing negative by as much as 5V without damaging the
part. Additional circuits protect against damage from
electrostatic discharge.
MIC4421A/4422A drivers can replace three or more
discrete components, reducing PCB area requirements,
simplifying product design, and reducing assembly cost.
Modern Bipolar/CMOS/DMOS construction guarantees
freedom from latch-up. The rail-to-rail swing capability of
CMOS/DMOS insures adequate gate voltage to the
MOSFET during power up/down sequencing. Since these
devices are fabricated on a self-aligned process, they have
very low crossover current, run cool, use little power, and
are easy to drive.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
High peak-output current: 9A Peak (typ.)
Wide operating range: 4.5V to 18V (typ.)
Minimum pulse width: 50ns
Latch-up proof: fully isolated process is inherently
immune to any latch-up
Input will withstand negative swing of up to 5V
High capacitive load drive: 47,000pF
Low delay time: 15ns (typ.)
Logic high input for any voltage from 2.4V to V
S
Low equivalent input capacitance: 7pF (typ.)
Low supply current: 500µA (typ.)
Output voltage swing to within 25mV of GND or V
S
Applications
Switch mode power supplies
Motor controls
Pulse transformer driver
Class-D switching amplifiers
Line drivers
Driving MOSFET or IGBT parallel chip modules
Local power ON/OFF switch
Pulse generators
___________________________________________________________________________________________________________
Typical Application
Load
Voltage
V
S
+15V
1µF
0.1µF
MIC4422A
1
Load
VS
VS
IN
OUT
OUT
GND
7
Si9410DY*
N-Channel
MOSFET
8
6
0.1µF
On
Off
2
4,5
* Siliconix 30m, 7A max.
Load voltage limited by MOSFET drain-to-source rating
Low-Side Power Switch
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2007
M9999-062707