Datasheet
AS3642
Ultra Small 500mA Inductive White LED Flash Driver
1 General Description
2 Key Features
flash driver solution only 11mm
The AS3642 is an inductive high efficient DCDC step up
?? Total
2
converter driving a current source. The DCDC step up
converter operates at a fixed frequency of 4MHz and
includes soft startup to allow easy integration into noise
sensitive RF systems. The current source operates in
flash/torch/assist (video/autofocus) and indicator mode.
The AS3642 includes flash timer, overvoltage, overtem-
perature, undervoltage and LED short circuit protection
functions.
The AS3642 is able to detect a broken coil. Together
with the LED short and open detection the AS3642 can
be used to verify the connection to its external compo-
nents and allowing in-circuit test. This reduces test time
and simplifies production test procedures.
?? High efficiency 4MHz fixed frequency DCDC Boost
converter with soft start allows small coils
?? LED currents
Up to 500mA flash current (15.6mA steps)
Up to 320mA torch current (10mA steps)
1.35mA,2.9mA,4.4mA or 6mA indicator light current
(PWM with 1...4/32 duty cycle)
?? Flash LED(s) cathode connected to ground:
Improved thermal performance (ground = heat sink)
Simplified PCB layout
?? Adjustable Flash Timer
30ms to 480ms in 30ms steps
The AS3642 is controlled by an I C interface to allow
2
?? Flash,
Torch, Assist and Indicator Mode
sophisticated control of all settings like currents and tim-
?? Protection
functions:
11mm PCB area.
ings.
The complete flash driver solution measures only
2
The AS3642 is available in a space-saving WL-CSP
package measuring only 1.5x1.1x0.6mm and operates
over the -30oC to +85oC temperature range.
Figure 1. Typical Operating Circuit
Automatic Flash timer to protect the LED
Overvoltage and undervoltage Protection
Overtemperature Protection
LED short circuit protection
?? Available in tiny WL-CSP Packages
2x3 balls 0.5mm pitch, 1.5x1.1x0.6mm package size
3 Applications
Flash/Torch for mobile phones, digital cameras and PDA
 
   
     
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相关代理商/技术参数
AS3642-ZWLT-500 功能描述:IC WHITE LED FLASH DRIVER 6WLCSP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM,降压(降压) 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED(HBLED) 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC(0.154",3.90mm 宽) 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M
AS3643-ZWLT 功能描述:IC LED DVR CAMERA FLASH 13WLCSP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极,PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
AS3643-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:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM,降压(降压) 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED(HBLED) 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC(0.154",3.90mm 宽) 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M
AS3644-ZWLT 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压(升压) I2C 调光 320mA(闪存) 6-WLCSP(1.5x1.1) 制造商:ams 系列:- 包装:带卷(TR) 零件状态:有效 类型:DC DC 稳压器 拓扑:升压(升压) 内部开关:是 输出数:1 电压 - 供电(最低):2.5V 电压 -?供电(最高):5V 电压 - 输出:- 电流 - 输出/通道:320mA(闪存) 频率:4MHz 调光:I2C 应用:照相机闪光灯 工作温度:-30°C ~ 85°C(TA) 安装类型:表面贴装 封装/外壳:6-UFBGA,WLCSP 供应商器件封装:6-WLCSP(1.5x1.1) 标准包装:12,000
AS3645A-ZWLT 制造商:ams 功能描述:IC PHOTOFLASH DRIVER 12WLCSP 制造商:ams 功能描述:T&R / WL-CSP12 (2.0x1.5x0.5)
AS3645-ZWLT 功能描述:IC PHOTOFLASH DRIVER 12WLCSP 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
AS3646-ZWLT 功能描述:IC LED DRIVER REGULATOR 12WLCSP 制造商:ams 系列:* 零件状态:有效 标准包装:500
AS3647B-ZWLT 功能描述:LED 驱动器 IC 2 输出 DC DC 稳压器 升压(升压) I2C 调光 800mA(闪存) 15-WLCSP 制造商:ams 系列:- 包装:带卷(TR) 零件状态:有效 类型:DC DC 稳压器 拓扑:升压(升压) 内部开关:是 输出数:2 电压 - 供电(最低):2.7V 电压 -?供电(最高):4.4V 电压 - 输出:2.8 V ~ 5.5 V 电流 - 输出/通道:800mA(闪存) 频率:4MHz 调光:I2C 应用:照相机闪光灯 工作温度:-30°C ~ 85°C(TA) 安装类型:表面贴装 封装/外壳:15-UFBGA,WLCSP 供应商器件封装:15-WLCSP 标准包装:10,000