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參數(shù)資料
| 型號： | G5920TB1U |
| 廠商： | Global Mixed-mode Technology Inc. |
| 英文描述： | Ultra Low-Dropout, Constant-Current White LED Bias |
| 中文描述： | 超低壓差，恒流白光LED偏置 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大小： | 681K |
| 代理商： | G5920TB1U |
Ver: 0.4 Preliminary
Feb 03, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
7
G5920/G5921
Global Mixed-mode Technology Inc.
Function Description
G5920/G5921 LED pins act as well matched current
source driving LED diode to ground. An EN pin is used
to turn on and turn off G5920/G5921.
When applying a lower frequency (less than 2kHz)
PWM waveform to EN pin, the average LED current
will be duty*20mA(typical). Refer to Fig.1
If the application is not suitable to apply such a low
frequency PWM dimming waveform, this EN pin can
be negatively pulsed to set continuous LED current.
When no negative pulse is input to EN pin (Code=0),
the internal register will latched to set the maximum
LED current, typically 20mA. Whenever input N nega-
tive pulses to the EN pin, it will get a LED current cor-
responding to Code N. In this manner, LED current will
changed from previous value to new value after the
last pulse for typical 80s (TEOP). Please refer to Fig.2
T
EOP
T
OFF
20mA (Code=0)
T
EOP
ON duty
Fig.1 Turn ON to PWM dimming
EN
I
LED
T
EOP
T
OFF
20mA (Code=0)
T
EOP
ON duty
Fig.1 Turn ON to PWM dimming
EN
I
LED
T
EOP
T
LOW
T
HIGH
N negative pulses
T
OFF
31
N
Fig.2 Turn ON and config Code N
LED current corresponding to Code N
EN
Code
I
LED
T
EOP
T
LOW
T
HIGH
N negative pulses
T
OFF
31
N
Fig.2 Turn ON and config Code N
LED current corresponding to Code N
EN
Code
I
LED
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相關代理商/技術參數(shù) |
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|---|---|
| G5921 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Ultra Low-Dropout, Constant-Current White LED Bias |
| G5921P8U | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Ultra Low-Dropout, Constant-Current White LED Bias |
| G592-5 | 制造商:CML Innovative Technologies 功能描述:LAMP MES G3.1/2 24V 1.2W |
| G5930 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Switched Capacitor Voltage Inverter with Shutdown |
| G5930TBU | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Switched Capacitor Voltage Inverter with Shutdown |
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