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参数资料
| 型号： | BD9206EFV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 9/18页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 6V LCD 20HTSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | PWM |
| 输出数： | 6 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 电源电压： | 8 V ~ 30 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-HTSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | BD9206EFV-E2DKR |
BD9206EFV
Datasheet
● Rise time and Fall time of LED Driver ’s constant current
In the state of STBY=H, the rise time of constant current at the time of EN=L → H and the fall time at the time of EN=H → L
are as shown in the following table.
As shown in Fig.5, the constant current driver is formed in such a way that the NMOS of the driver output is made to be
operated or stopped by the EN signal.
Therefore, the rise time for the second time or later is shorter than the one for the first time because the electrical charge
of the capacitor for phase compensation is reopened from the charged state.
First time
Second time or later
Remarks
The time interval between the
Rise time 2.9 μ s ± 7% 2.6 μ s ± 7%
Fall time 0.7 μ s ± 11% 0.7 μ s ± 11%
moment of EN=L → H and the
moment at which the I LED
reaches 90% of the set value
The time interval between the
moment of EN=H → L and the
moment at which the I LED
reaches 10% of the set value
On the condition that VCC=Vo=24V, VF （ LED ） =3.2V 5-stage connection, RL=15 ?
■ STBY, EN
At the time of STBY=L, it becomes the OFF mode, then only a portion of the circuit inside the IC is operating, so the circuit
current is restricted to 17 μ A (typ).
At the time of STBY=H, it becomes the Standby mode, then 5VREG is started and UVLO is released before the LED driver
gets into the state of Ready.
After that, if EN=L → H, then the current flows into the LED driver and the LED is lighted up.
Note: If STBY and EN are simultaneously made to be L → H, then the rising edge of the LED driver gets late because the
starting time of 5VREG is necessary.
If it is used after PWM dimming, then please let STBY=H beforehand and input the CLK to EN before using.
● Operation logic of LED driver
STBY
EN
L
H
L
Stop
Stop
H
Stop
Operation
STBY
EN
UVLO
TSD
LED
Driver
active : High
● Logic of LED driver protection circuit
Figure 17
Function
UVLO
TSD
Stop
VREG < 2.9V(typ)
Ta > 175 ℃
Operation
VREG > 3.0V(typ)
Ta < 155 ℃
■ TEST terminal
TEST terminal is only used in ROHM’s testing process before delivery, so please use the IC with the terminal fixed at Low in
normal times.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
9/15
TSZ02201-0F1F0C100070-1-2
20.Sep.2012 Rev.001
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