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参数资料
| 型号： | AS3648-ZWLT |
| 厂商： | ams |
| 文件页数： | 14/39页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 2000MA FLASH 13WLCSP |
| 标准包装： | 10,000 |
| 恒定电压： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 闪灯/白光 |
| 频率： | 4MHz |
| 电源电压： | 2.7 V ~ 4.4 V |
| 输出电压： | 2.8 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 13-UFBGA，WLCSP |
| 供应商设备封装： | 13-WLCSP（2.25x1.5） |
| 包装： | 带卷 (TR) |
| 工作温度： | -30°C ~ 85°C |
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AS3648
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n
Figure 19. Device Shutdown and Wakeup
" &
" #!$%"
! !"
AS3648
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' ( )(*
)) ) (
+ & +
the I C bus. Therefore no additional action is required to leave the shutdown mode and start I C communication.
In shutdown mode once pin SCL goes high for the first time, the internal counter shown in Figure 19 is immediately
reset thus releasing the internal RESET (assuming VIN is above V UVLO ) signal and allows instant communication on
2 2
Purpose of this circuit
The purpose of this circuit is an additional security mechanism.
Assume the user programmed torch or indicator operation (there is no timeout for these operating modes) and the bat-
tery slowly drops below the undervoltage limit of the system. The processor would get an reset by the PMIC and the
LDO operating VDD_I/F is switched off, but the processor might not have been able to switch-off the torch/indicator
operation of the AS3648. Due to the implemented security mechanism the AS3648 detects a power off of VDD_I/F and
automatically enters shutdown.
Current consumption in standby/shutdown mode
The AS3648 is designed to draw minimum current in standby and shutdown mode. There is a small difference in cur-
rent consumption between these two operating modes (typ. 300nA) only due to the internal level shifters (see the
schmitt trigger input buffers connected to SCL and SDA in Figure 19 ) for shifting up the voltage on SCL/SDA (VDD_I/F
e.g. 1.8V) to the supply voltage on VIN (e.g. 3.7V). If the AS3648 is driven with digital levels close to 0V/VIN, the cur-
rent consumption for standby mode is identical to shutdown mode.
Operating Mode and Currents
The output currents and operating mode are selected according to the following table:
Table 5. Operating Mode and current settings
AS3648 configuration
operating mode and currents
setting out_on
(see
page
26)
mode_
(see
page
27)
Condition
Mode
LED_OUT1/2
output current
if previous operating
assist light or flash mode all registers are reset to
SCL
low
for
t TIME
1
OUT
X
X
X
X
mode was indicator,
shutdown
their default values
0
www.austriamicrosystems.com/AS3648
1.5-4
13 - 38
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS3648-ZWLT-500 | 功能描述:IC WHITE LED FLASH DVR 13WLCSP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| AS36490FLF | 制造商:TT Electronics / IRC 功能描述:AS36490FLF |
| AS36490HLF | 制造商:TT Electronics / IRC 功能描述:AS36490HLF |
| AS36490JLF | 制造商:TT Electronics / IRC 功能描述:AS36490JLF |
| AS36491FLF | 制造商:TT Electronics / IRC 功能描述:AS36491FLF |
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