AMC7140DLFT 데이터 시트보기 (PDF) - ADDtek Corp
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AMC7140DLFT Datasheet PDF : 9 Pages
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APPLICATION INFORMATION
AMC7140
AMC7140 is a high voltage, low dropout current regulator for maximum output current up to 700mA with OE pin.
The current could be linearly adjusted through variable resister connected to ISET pin, or by PWM control via OE pin.
Although the absolute maximum rating of OUT pin 60V, the dropout voltage between OUT pin and GND pin should
not be too large when current is sinking because of the heat dissipation capability of the package.
Here are some of the typical application examples:
DC Voltage Input:
Any DC voltage level between 5V to 50V could be adopted as power source VDD for typical application of
AMC7140 as long as VDD is larger than the total forward voltage drop of the LED string (at expecting current) by 0.35V.
If 50V ~ 60V voltage level is adopted as power source to positive end of the LED string, one Zener shunt regulator
could be used to provide appropriate voltage to VDD pin.
＜50VDC
Enable
CIN
RSET1
VDD
OUT
OE AMC7140
ISET
GND
RSET2 880Ω
＞50VDC
RZ
CIN
Enable
DZ
RSET1
VDD
OUT
OE AMC7140
ISET
GND
RSET2 880Ω
Copyright © 2007 ADDtek Corp.
5
DD032_B -- APRIL 2007
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