参数资料
型号: AS3647-ZWLT-500
厂商: ams
文件页数: 26/38页
文件大小: 0K
描述: IC WHITE LED FLASH DVR 13WLCSP
标准包装: 1
恒定电压:
拓扑: PWM,升压(升压)
输出数: 2
内部驱动器:
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
AS3647/47B
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n
Table 10. Low Voltage Register
Addr: 4
Low Voltage Register
This register defines the operating mode with low battery voltages
Bit
Bit Name
Default Access
Description
Voltage level on VIN where current reduction triggers during
operation (see Current Reduction by VIN measurements in
Flash Mode on page 16) - only in flash mode; if VIN drops
below this voltage during current ramp up, the current ramp
up is stopped; during operation the current is decreased
until the voltage on VIN rises above this threshold -
fault_uvlo is set
0h
function is disabled
2:0
vin_low_v_run
4h
R/W
1h
3.0V
2h
3h
4h
5h
6h
7h
3.07V
3.14V
3.22V - default
3.3V
3.38V
3.47V
Voltage level on VIN where driver will change current before
startup (only in flash mode)
if before startup ( out_on set from 0 to 1), the voltage on VIN
is below vin_low_v , the current is changed to
flash_txmask_current ( vin_low_v_shutdown =0) or
0=shutdown ( vin_low_v_shutdown =1) and fault_uvlo is set
0h
function is disabled
5:3
vin_low_v
5h
R/W
1h
2h
3.0V
3.07V
3h
4h
5h
6h
7h
3.14V
3.22V
3.3V - default
3.38V
3.47V
Enables Shutdown of current reduction under low voltage
conditions
6
vin_low_v_shutdown
0
R/W
0
if before startup ( out_on set from 0 to 1), the voltage
on VIN is below vin_low_v , the current is changed to
flash_txmask_current and fault_uvlo is set
1
if before startup ( out_on set from 0 to 1), the voltage
on VIN is below vin_low_v , the operating mode stays
in shutdown (zero LED current) and fault_uvlo is set
Enables Constant output voltage mode
7
const_v_mode
0
R/W
0
1
Normal operation defined by mode_setting
5V constant voltage mode on VOUT1/2;
reset registers mode_setting , out_on and
ext_torch_on before setting this bit
www.austriamicrosystems.com/AS3647
1.5-4
25 - 37
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