- 您现在的位置：买卖IC网 > Datasheet目录315 > BD6586MUV-E2 (Rohm Semiconductor)IC LED DRVR WHITE BCKLGT 24-VQFN Datasheet资料下载
参数资料
| 型号： | BD6586MUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 24-VQFN |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 700kHz ~ 1.3MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | VQFN024V4040 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1372 (CN2011-ZH PDF) |
| 其它名称： | BD6586MUV-E2DKR |
BD6586MUV
Datasheet
● Brightness Control
There are two dimming method is available, first method is analog dimming that apply analog voltage to ISETH terminal,
and second method is PWM control via digital dimming of EN1, EN2 PWM terminals or PWM. Because each method has
the different merit, please choose a suitable method for the application of use.
Refer to Figure 25 for the analog dimming.
Two techniques can be used as digital dimming by the PWM control. One is PWM control of current driver, the other is
PWM control of power control.
As these two characteristics are shown in the below, selects to PWM control process comply with application.
?Efficiency emphasis in the low brightness which has an influence with the battery life
?LED current dispersion emphasis in the PWM brightness control
(Reference)
? 2) Power control PWM control
? 1) Current driver PWM control
PWM regulation process
Current driver
Power control
Efficiency of LED current 0.2mA
(PWM Duty=1%)
60%
94%
PWM frequency 200Hz
Low Duty
0.1%
0.6%
1) Current driver PWM control is controlled by providing PWM signal to PWM terminal, as it is shown Figure 7.
The current set up with ISET is chosen as the H section of PWM and the current is off as the L section. Therefore, the
average LED current is increasing in proportion to duty cycle of PWM signal. This method that it lets internal circuit and
DC/DC to work, because it becomes to switch the driver, the current tolerance is a few when the PWM brightness is
adjusted, it makes it possible to brightness control until 20μs (MIN0.4% at 200Hz). And, don't use for the brightness
control, because effect of ISET changeover is big under 20μs ON time and under 20μs OFF time. There is no effect of
ON/OFF changeover at 0% and 100%, so there is no problem on use. Typical PWM frequency is 100Hz to 10kHz.
PWM
LED current
Coil current
IC’s active current
ON
ON
ON
OFF
OFF
OFF
ON
Figure 7. Current driver PWM control
2) Power control PWM control is controlled by providing PWM signal to EN1, EN2 as it is shown Figure 8. The current
setting set up with PWM logic is chosen as the H section and the current is off as the L section. Therefore, the average
LED current is increasing in proportion to duty cycle of EN1, EN2 signal. This method is, because IC can be power-off at
off-time, the consumption current can be suppress, and the high efficiency can be available, so it makes it possible to
brightness control until 50μs (MIN1% at 200Hz). And, don't use for the brightness control, because effect of power
ON/OFF time changeover is big under 50μs ON time and under 50μs OFF time. There is no effect of ON/OFF
changeover at 0% and 100%, so there is no problem on use. Typical PWM frequency is 100Hz to 1kHz.
EN1,EN2
LED current
Coil current
IC’s active current
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Figure 8. Power control PWM control
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
7/20
TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001
相关PDF资料 |
PDF描述 |
|---|---|
| BD6592MUV-E2 | IC LED DRVR WHITE BCKLGT 24-VQFN |
| BD7844AEFV-E2 | IC LED DISPLAY DVR 5V 28-HTSSOP |
| BD8105FV-E2 | IC LED DVR SERIAL PAR 20-SSOP |
| BD8112EFV-ME2 | IC LED DRIVER 24-VSSOP |
| BD8119FM-ME2 | IC WHITE LED DVR PWM 28-HSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BD6590MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type) |
| BD6590MUV_11 | 制造商:ROHM 制造商全称:Rohm 功能描述:White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type) |
| BD6590MUV-E2 | 制造商:ROHM Semiconductor 功能描述:White backlight LED Driver,106LEDs,40V |
| BD6592MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD6592MUV_11 | 制造商:ROHM 制造商全称:Rohm 功能描述:White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type) |
发布紧急采购，3分钟左右您将得到回复。