參數(shù)資料
型號(hào): LM2707MF
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 顯示驅(qū)動(dòng)器
英文描述: Inductive-Boost Series LED Driver with Programmable Oscillator Frequency
中文描述: LED DISPLAY DRIVER, PDSO8
封裝: SOT-23, 8 PIN
文件頁(yè)數(shù): 8/19頁(yè)
文件大?。?/td> 1039K
代理商: LM2707MF
Typical Performance Characteristics
Unless otherwise specified: V
IN
= 3.0V, V
EN
= 3.0V, L = 22μH
(Coilcraft DT1608C-223), D = MBR0520L (Vishay), C
IN
= 1.0μF, C
OUT
= 2x1μF, C
x
= 68pF, T
A
= 25
o
C. (Continued)
LED Drive Efficiency vs. Supply Voltage
2 LEDs
(Note 11)
LED Drive Efficiency vs. Supply Voltage
3 LEDs
(Note 11)
20099218
20099219
LED Drive Efficiency vs. Supply Voltage
4 LEDs
(Note 11)
LED Current vs. Duty Cycle
20099253
* 20mA, 4-LED operation requires increasing the current limit.
A 1
resistor was placed between the V
IN
and L
X
pins.
Note 11:
LED drive efficiency is the ratio of the power consumed by the LEDs
to the power drawn at the LM2707 input (E = P
/ P
). Approximate LED
forward voltage characteristics of the LEDs used for the efficiency curve data: I
F
= 5mA: V
F
= 3.1V; I
F
= 10mA: V
F
= 3.3V; I
F
= 15mA: V
F
= 3.5V; I
F
= 20mA: V
F
= 3.7V.
20099209
L
www.national.com
8
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