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MP3304CDD 데이터시트(PDF) 10 Page - Monolithic Power Systems

부품명 MP3304CDD
상세설명  36V, 1.3A, Step-up White LED Driver with High Frequency True PWM Dimming
PDF  12 Pages
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제조업체  MPS [Monolithic Power Systems]
홈페이지  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP3304CDD 데이터시트(HTML) 10 Page - Monolithic Power Systems

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MP3304 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING
MP3304 Rev. 0.91
www.MonolithicPower.com
10
4/19/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
TYPICAL APPLICATION CIRCUITS (continued)
MP3304A
SW
IN
ISET
LED
PGND
GND
EN
LED+
LED-
C2
330nF
50V
D2
5.6V
7.5
ZENER
D1
B0540
L1
10uH
Optional
Bias Circuit
GND
EN
VIN
3.3V -18V
C1
10uF
25V
C3
0.1uF
50V
2
31
6
7
5
8
Figure 6 — Driving 27 WLEDs (9 WLEDs in Series and 3 Strings Paralleled) with 3.3V-18V Input Voltage
In order to improve the MOSFET on-resistance at low input voltage and make the chip compatible for
high input voltage, the additional bias circuit should be used.
MP3304A
SW
LED
IN
ISET
PGND
GND
EN
GND
EN
LED+
LED-
VIN
4.5V-18V
C1
10uF
25V
C4
330nF
50V
C3
0.1uF
25V
Q2
2N3904
D2
5.6V
ZENER
Required Bias Circuit
for High Input Voltage
L1
D1
10uH
B0540
7
8
2
31
6
5
Figure 7 — Wide Input Voltage Step-up Converter for 27 WLEDs
( 9 WLEDs in Series and 3 Strings Paralleled )



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