- 您现在的位置：买卖IC网 > PDF目录1774 > A8439EEJTR-T (Allegro Microsystems Inc)IC CHARGER PHOTO FLASH 10-MLP PDF资料下载
参数资料
| 型号： | A8439EEJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER PHOTO FLASH 10-MLP |
| 标准包装： | 1 |
| 应用： | 照相机闪光灯电容器充电器 |
| 电流 - 电源： | 1.5mA |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN/MLP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1142 (CN2011-ZH PDF) |
| 其它名称： | 620-1203-6 |
A8439
Photoflash Capacitor Charger with IGBT Driver and Refresh
decoder circuit to receive ILIM inputs and set I SWLIM , and has a
minimum duration of 54 μ s.
Figure 5 shows the timing definition of the primary current
limiting circuit. At the end of the setup period, t ILIM(SU) , primary
current starts to ramp up to the set I SWIM . The I SWLIM setting
remains in effect as long as the CHARGE pin is high. To reset the
ILIM counter, pull the CHARGE pin low before clocking in the
new setting.
After the first start-up or an ILIM counter reset, each new current
limit can be set by sending a burst of pulses to the CHARGE pin.
The first rising edge starts the ILIM counter, and up to 8 rising
edges will be counted to set the I SWLIM level. The first pulse
width, t ILIM1(H) , must be at least 20 μ s long. Subsequent pulses
(up to 7 more) can be as short as 0.2 μ s. The last low-to-high
edge must arrive within 54 μ s from the first edge. The CHARGE
pin will stay high afterwards. The four panels of figure 6 show
examples of the pulse streams and the resulting current levels.
(A) 1.4 A
(B) 1.2 A
Clock input at
CHARGE pin
t ILIM(L) ≥ 0.2 μ s
t ILIM1(H) = min.
first pulse width
t ILIM(H) ≥ 0.2 μ s
(C) 1.0 A
t ILIM(SU) = maximum
ILIM setup time
0 μ s
First rising
edge
20 μ s
Subsequent rising
edges (0 to 7)
54 μ s
Switching
starts
Figure 4. ILIM Clock Timing Definition
CHARGE
I SW
Start ILIM counter
Four rising edges
within t ILIM(SU)
Reset ILIM counter
I SWLIM4 = 0.86 A
Switching
starts
Switching
stops
(D) 0.86 A
0 μ s
20 μ s
54 μ s
Figure 5. Current Limit Programming Example (I SWLIM4 selected).
Figure 6. ILIM programming waveforms for I SWLIM = 1.4 A, 1.2 A, 1.0 A,
and 0.86 A.
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
10
相关PDF资料 |
PDF描述 |
|---|---|
| A8447SLJTR-T | IC REG BUCK ADJ 3A 8SOIC |
| A8483EEK-T | IC REG BOOST ADJ 0.35A 5MLP |
| A8498SLJ-T | IC REG BUCK ADJ 3A 8SOIC |
| A8499SLJ-T | IC REG BUCK ADJ 2A 8SOIC |
| A8582KLPTR-T | IC REG BUCK ADJ 2A 16TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A843DSC | 制造商:Pentair Technical Products / Hoffman 功能描述:Enclosure, Junction Box, 8.00x4.00x2.75in, Flat Cover, NEMA 4, Mild Steel 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE JUNCTION BOX STEEL GRAY 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY 制造商:Hoffman Enclosures 功能描述:SCREW COVER DSC ENCLOSURE8 X 4 X 2.75 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY, Enclosure Type:Junction Box, Enclosure Mat 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY, Enclosure Type:Junction Box, Enclosure Material:Steel, Body Color:Grey, External Height - Imperial:8", External Height - Metric:203mm, External Width - Imperial:4", External Width - Metric:102mm , RoHS Compliant: Yes |
| A844 | 制造商:TE Connectivity 功能描述:- Bulk |
| A8447 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:High Voltage Step Down Regulator |
| A8447SLJ-T | 制造商:Allegro MicroSystems LLC 功能描述:HIGH VOLTAGE STEP DOWN REGULATOR |
| A8447SLJTR-T | 功能描述:IC REG BUCK ADJ 3A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
发布紧急采购，3分钟左右您将得到回复。