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參數(shù)資料
| 型號： | EV5103 |
| 廠商： | Global Mixed-mode Technology Inc. |
| 英文描述： | G5103 White LED Demo Board V1.0 |
| 中文描述： | G5103白光LED演示板1.0 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 143K |
| 代理商： | EV5103 |
Jan 21, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1
EV5103-10
Global Mixed-mode Technology Inc.
G5103 White LED Demo Board V1.0
Introduction
G5103 is a step-up (boost) DC/DC converter, using constant peak inductor current and minimum OFF
time PFM topology. It could output up to 16V and drive 20mA from a 2.5V ~ 5.5V input power source,
such as a Li-Ion battery. G5103 is suitable for series 2~4 white LED driver application because its
maximum 16V output capability. This solution possess high efficiency about 84% when drive 4 white
LED at 20mA output LED current with a 3.6V Li-Ion battery power input.
This demo board could demonstration:
1.
Drive 2 ~ 4 white LED @ 20mA.
2.
200Hz PWM dimming control.
3.
Only need 3.0V ~ 5.5V power source. A Li-Ion battery is a good power source.
200Hz PWM Dimming White LED Driver Demo Schematic
10uH/0.5A
L1
27_1%
R1
120K_1%
R2
SW
MBR0530
D1
V
5
S
1
FB
3
SHDN
4
V
2
G5103
U1
LED1
LED2
LED3
LED4
240K_1%
R3
620K_1%
R4
1
2
VCC Jumper
JP1
1
2
3
4
BATT
J1
VCC
PWM Dim
+3VDC
FB
VISEN
VDD
GP5
GP4
GP3
1
2
3
4
GP2
5
GP1
6
GP0
7
VSS
8
PIC12C508
U3
IN
1
OUT
5
SHDN
3
BYP
4
GND
2
G914C
U2
1uF
C3
VBAT
1uF
C4
0.1uF
C5
+3VDC
VBAT
VCC
4.7uF
C1
0.1uF
C2
+3VDC
DIM Low
SW1
PWM Dim
DIM High
SW2
FREQ
SW3
18.5mA
2 ~ 4 White LED
PWM Dimming Control Introduction
SW1: Dimming dark ( minimum dimming duty = 0%)
SW2: Dimming light ( maximum dimming duty = 100%)
SW3: Change PWM dimming frequency ( 150Hz 250Hz)
Fig.1
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相關代理商/技術參數(shù) |
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| EV5103-10 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:G5103 White LED Demo Board V1.0 |
| EV511 | 制造商:Cooper Crouse-Hinds 功能描述: |
| EV51-100-11-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| EV51-100-12-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| EV51-100-21-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
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