参数资料
型号: BD6581GU-E2
厂商: Rohm Semiconductor
文件页数: 16/35页
文件大小: 0K
描述: IC LED DVR WHT BCKLGHT VCSP85H2
标准包装: 3,000
拓扑: PWM,升压(升压)
输出数: 6
内部驱动器:
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: 44.7 V
安装类型: 表面贴装
封装/外壳: 23-VFBGA,CSPBGA
供应商设备封装: VCSP85H2
包装: 带卷 (TR)
工作温度: -30°C ~ 85°C
BD6581GU
Datasheet
● Start to Use PWMPOW Terminal for the PWM Control, PWM Operating
After RSTB and PWMDRV is changing L → H, input PWM to PWMPOW terminal.
There is no constraint in turn of RSTB and PWMDRV.
And, because it corresponds to PWM drive of shorter ON time than soft start time (1ms), when PWMPOW is input H more
than three times, the soft start is invalidated and it enable to correspond the high-speed drive. Until RSTB is set L,
invalidation of the soft start isn't canceled.
In case of lighting → light off → lighting, when it turns off the lights with PWM=L and It starts without soft start when it sets
PWM modulated light again.
But the peak current of the coil changes owing to discharge of output capacitor, It may flow to the over current limit value,
as follows Figure 32. Because soft start can be used when it turns off the lights with RSTB=L, The peak current of the coil
can be suppressed, as follows Figure 33 and this process of light off is recommended.
RSTB
PWMDRV
PWMPOW
Output Voltage
Current coil
Figure 32. Light off control of PWMPOW pin at PWM control on PWM=L
RSTB
PWMDRV
PWMPOW
Output Voltage
Current coil
Figure 33. Light off control of PWMPOW pin at PWM control on RSTB=L
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
16/32
TSZ02201-0G3G0C400170-1-2
03.Dec.2012 Rev.001
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