- 您现在的位置：买卖IC网 > Datasheet目录316 > BD8112EFV-ME2 (Rohm Semiconductor)IC LED DRIVER 24-VSSOP Datasheet资料下载
参数资料
| 型号： | BD8112EFV-ME2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 13/25页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 24-VSSOP |
| 应用说明： | Automotive Applications |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 高端，低端，PWM，降压（降压），升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 两者兼有 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 频率： | 250kHz ~ 600kHz |
| 电源电压： | 5 V ~ 30 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VSSOP（0.220"，5.60mm 宽）裸露焊盘 |
| 供应商设备封装： | 24-HTSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 105°C |
| 其它名称： | BD8112EFV-ME2DKR |
BD8112EFV-M
Technical Note
1. Computation of the Input Peak Current and IL_MAX
① Calculation of the maximum output voltage (Vout_max)
To calculate the Vout_max, it is necessary to take into account of the VF variation and the number of LED connection in
series.
Vout_max = (VF + Δ VF) × N + 1.0V
② Calculation of the output current Iout
Iout = ILED × 1.05 × M
③ Calculation of the input peak current IL_MAX
IL_MAX = IL_AVG + 1/2 Δ IL
IL_AVG = (VIN + Vout) × Iout / (n × VIN)
Δ VF: VF Variation N: Number of LED connection in series
M ： Number of LED connection in parallel
Δ IL=
V IN
L
×
1
Fosc
×
Vout
V IN +Vout
n: efficiency
Fosc: switching frequency
? The worst case scenario for VIN is when it is at the minimum, and thus the minimum value should be applied in the
equation.
? The L value of 10μF ? 47μF is recommended. The current-mode type of DC/DC conversion is adopted for
BD8112EFV-M, which is optimized with the use of the recommended L value in the design stage. This recommendation
is based upon the efficiency as well as the stability. The L values outside this recommended range may cause irregular
switching waveform and hence deteriorate stable operation.
? n (efficiency) is approximately 80%
V IN
I L
Rcs
CS
M1
L
D2
Vout
M2
D1
Co
External Application Circuit
2. The setting of over-current protection
Choose Rcs with the use of the equation Vocp_min (=0.54V) / Rcs > IL_MAX
When investigating the margin, it is worth noting that the L value may vary by approximately ±30%.
3. The selection of the L
In order to achieve stable operation of the current-mode DC/DC converter, we recommend selecting the L value in the
range indicated below:
0.05 [V/μs] < Vout × Rcs < 0.3 [V/μs]
L
The smaller
Vout × Rcs
L
allows stability improvement but slows down the response time.
4. Selection of coil L, diode D1 and D2, MOSFET M1 and M2, and Rcs
Current rating
Voltage rating
Heat loss
Coil L
Diode D1
Diode D2
MOSFET M1
MOSFET M2
> IL_MAX
> Iocp
> Iocp
> Iocp
> Iocp
―
> VIN_MAX
> Vout
> VIN_MAX
> Vout
Rcs
―
―
> Iocp 2 × Rcs
*
*
Allow some margin, such as the tolerance of the external components, when selecting.
In order to achieve fast switching, choose the MOSFETs with the smaller gate-capacitance.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
13/22
2011.08 - Rev.C
相关PDF资料 |
PDF描述 |
|---|---|
| BD8119FM-ME2 | IC WHITE LED DVR PWM 28-HSOP |
| BD82103GWL-E2 | IC LED DRVR WHITE BCKLGT 11-UCSP |
| BD9206EFV-E2 | IC LED DRIVER 6V LCD 20HTSSOP |
| BD9207FPS-E2 | IC LED DVR STEPDWN 1.5A TO252S-5 |
| BH-14E_TI-20T_CTI | ADAPTER PIN CONVERTER 14-20 PIN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BD8113EFV | 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) |
| BD8113EFV_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) |
| BD8113EFV-E2 | 功能描述:LED照明驱动器 IC LED DRIVER 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 |
| BD8115F-M | 制造商:ROHM 制造商全称:Rohm 功能描述:LED Driver IC |
| BD8115F-MTE2 | 功能描述:LED照明驱动器 Auto Grade LED Drvr 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 |
发布紧急采购，3分钟左右您将得到回复。