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| 型号： | SSL3250AHN/C1,528 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 6/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR PHOTO FLASH 16-HVQFN |
| 产品培训模块： | LED Controllers |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1.08MHz ~ 1.32MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 9.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VFQFN 裸露焊盘 |
| 供应商设备封装： | 16-HVQFN |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 568-4718-6 |
NXP Semiconductors
SSL3250A
Photo flash dual LED driver
8.2.1 Using the direct enable control
When the Direct enable mode is used, the device can be switched to the various
operational modes using the ACT, EN1 and EN2 control signals. The definition of these
control signals is given in Table 5 . The current in the main LED, in Torch mode and Flash
mode and the LED current in the indicator LED can be independently controlled by the
external current setting resistors R_IND, R_TR and R_FL. When no external current
setting resistors are used, the pins should preferably be connected to VIN and the default
current levels for each LED.
Table 5.
Enable definition
ACT
0
1
1
1
1
EN2
X
0
0
1
1
EN1
X
0
1
0
1
Operational mode
Shut-down mode
Standby mode
Indicator mode
Torch mode
Flash mode
LED active
-
-
indicator LED
main LED
main LED
The relation between the ACT and EN1, EN2 signals is given in Figure 4 . All modes can
be entered from the Standby mode. Entering Torch mode or Indicator mode before
entering Flash mode is not required.
t start(soft)
Main LED
current
Indicator
LED current
EN1
EN2
ACT
Shut-down
Standby
Indicator
Torch
Flash
Torch
Indicator
014aaa294
Fig 4.
SSL3250A_5
Functional description of the SSL3250A
8.2.2 Using the I 2 C control
Using the I 2 C mode enables additional features and settings as described in the I 2 C
register set (see Table 6 ). The I 2 C mode has the same operational modes as described in
Section 8.2.1 , Figure 4 . The Flash mode is entered in two steps:
1. Set the correct current and timing values in the current control and timing registers.
This arms the device for the required flash operation.
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 16 December 2009
6 of 26
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