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| 型号： | AS3647-ZWLT-500 |
| 厂商： | ams |
| 文件页数： | 17/38页 |
| 文件大小： | 0K |
| 描述： | IC WHITE LED FLASH DVR 13WLCSP |
| 标准包装： | 1 |
| 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： | 标准包装 |
| 工作温度： | -30°C ~ 85°C |
| 其它名称： | AS3647-ZWLT-500DKR |
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AS3647/47B
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n
Table 5. Operating Mode and current settings (Continued)
AS3647/47B configuration
operating mode and currents
setting out_on
(see
page
26)
mode_
(see
page
26)
Condition
Mode
LED_OUT1/2
output current
X
X
10, 01
or 11
0
X
X
ext_torch_on (see page
24) not 10
standby
0
by the 7LSB bits of
low current pwm mode
by the 7LSB bits (6...0)
0
1
X
X
X
X
X
X
00
01
10
X
1
1
ext_torch_on =10
ext_torch_on =10
external torch mode
indicator mode or
assist light mode
3
LED current is defined
2
led_current
LED current is defined
by the 6LSB bits (bits
5...0) of led_current pwm
modulated with
31.25kHz defined by
register inct_pwm (1/
16...4/16)
LED current is defined
2
of led_current
X
X
strobe_on (see page 27)
=0
flash mode;
X
X
0->1
1
11
1
strobe_on = 1 and
strobe_type (see page
27) = 0
strobe_on = 1 and
strobe_type = 1
flash duration defined by
flash_timeout (see page
26)
flash mode;
flash duration defined by
STROBE input; timeout
defined by flash_timeout
LED current is defined
by led_current - the
current can be reduced
during flash, see Flash
Current Reductions
below
1. SCL low for t TIMEOUT and operating mode is indicator, assist or flash mode then shutdown mode is entered.
2. The MSB bit of this register not used to protect the LED; therefore the maximum assist / torch light current = half
the maximum flash current
3. The low current mode is a general purpose PWM mode to drive less current through the LED in average, but
keep the actual pulsed current in a range where the light output from the LED is still specified. As only the 6
LSBs of led_current are used the maximum current is limited to 1/4 of the maximum flash current.
Flash Current Reductions
TXMASK
Usually the flash current is defined by the register led_current . If the TXMASK/TORCH input is used and (configured
by ext_torch_on =01), the flash current is reduced to flash_txmask_current if TXMASK/TORCH=1.
Current Reduction by VIN measurements in Flash Mode
Due to the high load of the flash driver and the ESR of the battery (especially critical at low temperatures), the voltage
on the battery drops. If the voltage drops below the reset threshold of the system would reset. To prevent this condition
the AS3647/47B monitors the battery voltage and keeps it above vin_low_v_run as follows:
Before a flash is started the voltage on VIN is measured. If the voltage is below the setting of vin_low_v the fault_uvlo
(see page 27) is set and the flash is disabled (driver stays in shutdown) if vin_low_v_shutdown =1. The flash current is
reduced to flash_txmask_current if vin_low_v_shutdown =0.
www.austriamicrosystems.com/AS3647
1.5-4
16 - 37
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相关代理商/技术参数 |
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|---|---|
| AS3648-ZWLT | 功能描述:IC LED DVR 2000MA FLASH 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 |
| 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 |
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