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| 型号： | BD6583MUV-AE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 13/35页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER WHIT BCKLGT 24VQFN |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.2MHz |
| 电源电压： | 2.7 V ~ 22 V |
| 输出电压： | 43V |
| 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： | -30°C ~ 85°C |
| 产品目录页面： | 1372 (CN2011-ZH PDF) |
| 其它名称： | BD6583MUV-ADKR BD6583MUV-ADKR-ND BD6583MUV-AE2DKR |
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BD6583MUV-A
Datasheet
● Description of Functions
1) PWM current mode DC/DC converter
While BD6583MUV-A is power ON, the lowest voltage of LED1, 2, 3, 4, 5, 6 is detected, PWM duty is decided to be
0.5Vand output voltage is kept invariably. As for the inputs of the PWM comparator as the feature of the PWM current
mode, one is overlapped with error components from the error amplifier, and the other is overlapped with a current sense
signal that controls the inductor current into Slope waveform to prevent sub harmonic oscillation. This output controls
external Nch Tr via the RS latch. In the period where external Nch Tr gate is ON, energy is accumulated in the external
inductor, and in the period where external Nch Tr gate is OFF, energy is transferred to the output capacitor via external
SBD.BD6583MUV-A has many safety functions, and their detection signals stop switching operation at once.
2) Soft start
BD6583MUV-A has soft start function.
The soft start function prevents large coil current.
Rush current at turning on is prevented by the soft start function.
After RSTB is changed L ? H, when PWMPOW is changed L ? H, soft start becomes effective for within 1ms and soft
start doesn't become effective even if PWMPOW is changed L ? H after that.
And, when the H section of PWMPOW is within 1ms, soft start becomes invalid when PWMPOW is input to H more than
three times. The invalid of the soft start can be canceled by making RSTB ? L.
3) FAILSEL pin
When the error condition occurs, boost operating is stopped by the protection function, and the error condition is avoided.
On that occasion, the way to stop of boost operating by the protection function can be selected with FAILSEL pin. Details
are as shown in Figure 31, 32.
After power ON, when the protection function is operating under about 1ms have passed, the stop state of the boost
operating can be held through FAILSEL is H, the stop state can reset through RSTB is L.
And, boost operating is stopped when the protection function is operating through FAILSEL is L, but when the protection
function becomes un-detect, boost operating is started again. It never keeps holding the stop state of boost operating.
In PWM control by PWMDRV can’t use this function.
When it is off over 10ms on PWM control by PWMPOW using this function, it may be stopped the boost
operating as over current protection work at off on PWMPOW=L.
Object of protect function is as shown below.
?
?
?
?
?
Over-voltage protection
External SBD open detect
Thermal shutdown
LED terminal over-voltage protection
Over current limit
<FAILSEL=H>
RSTB
about 1ms
< When it is off on PWMPOW>
RSTB
PWMDRV
FAILSEL
“H”
un-operating range
PWMPOW
Output
Protection
un-detection
detection
un-detection
voltage
function
Coil current
Boost
operating
off
normal operating
boost stop
off
normal operating
FAILSEL
function
invalid
valid
<FAILSEL=L>
RSTB
about 1ms
< When it is off on RSTB>
RSTB
PWMDRV
FAILSEL
“L”
un-operating range
PWMPOW
Output
Protection
function
un-detectio
detection
un-detection
voltage
Coil current
Boost
operating
off
normal operating
boost stop
normal
operating
off
normal
FAILSEL
function
invalid
Figure 31. FAILSEL operating description
Figure 32. FAILSEL=H light off control
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
13/32
TSZ02201-0G3G0C400180-1-2
03.Dec.2012 Rev.001
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相关代理商/技术参数 |
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| BD6583MUV-E2 | 功能描述:LED照明驱动器 72 LEDs 2.7-22V 43V Max Out 25mA Out RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| BD6586MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD6586MUV_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) |
| BD6586MUV-E2 | 功能描述:LED照明驱动器 24 LEDs 2.7-5.5V 24V Max Out 25mA Out RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| 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) |
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