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参数资料
| 型号： | AS3648-ZWLT |
| 厂商： | ams |
| 文件页数： | 13/39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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V LEDSHORT if the LED current is above 14mA ( current_boost =0), 15.6mA ( current_boost =1) (see Figure 18 ). If the
AS3648
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n
Short Circuit Protection
After the startup of the DCDC converter, the voltage on LED_OUT1/2 is continuously monitored and compared against
8 9
voltage across the LED (VF LED = VOUT1/2-LED_OUT1/2) stays below V LEDSHORT , the DCDC is stopped (as a shorted
LED is assumed), the current sinks are disabled and the bit fault_led_short (see page 28) is set. In a dual LED config-
uration for the AS3648, if a single shorted LED is detected, this LED is disabled and the device continuous operation
with the other LED.
Figure 18. Short LED detection
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Overtemperature Protection
The junction temperature of the AS3648 is continuously monitored. If the temperature exceeds T OVTEMP , the DCDC is
stopped, the current sinks are disabled (instantaneous) and the bit fault_overtemp (see page 28) is set. The driver is
automatically re-enabled
10
once the junction temperature drops below T OVTEMP -T OVTEMPHYST .
TXMASK event occurred
If during flash, TXMASK current reduction is enabled (see TXMASK on page 14 , configured by ext_torch_on =01) and
a TXMASK event happened (pin TXMASK/TORCH=1), the fault register bit fault_txmask (see page 27) is set.
Flash Timeout
If the flash is started a timeout timer is started in parallel. If the flash duration defined by the STROBE input ( strobe_on
= 1 and strobe_type = 1, see Figure 26 on page 18 ) exceeds t FLASHTIMEOUT (adjustable by register flash_timeout (see
page 26) ), the DCDC is stopped and the flash current sinks (on pin LED_OUT1/2) are disabled and fault_timeout is
set.
If the flash duration is defined by the timeout timer itself ( strobe_on = 0, see Figure 24 on page 17 ), the register
fault_timeout is set after the flash has been finished.
Supply undervoltage Protection
If the voltage on the pin VIN (=battery voltage) is or falls below V UVLO , the AS3648 is kept in shutdown state and all
registers are set to their default state.
Wakeup Circuit - Power off detection
In flash, assist light and indicator mode (register mode_setting (page 26) =01, 10 or 11) and out_on (page 27) =1, if SCL
is L for more than t TIMEOUT , shutdown mode is automatically entered. This feature automatically detects a power-off of
the controlling circuit driving SCL and SDA (VDD_I/F goes to 0V e.g. due to a low power condition of the driving circuit)
- the internal circuit is shown in Figure 19 :
8. Measured for each LED_OUT1/2 pin
9. To avoid errors in short LED detection for LEDs with a high leakage current
10.In constant voltage mode ( const_v_mode =1) the DCDC will not be automatically re-enabled.
www.austriamicrosystems.com/AS3648
1.5-4
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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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