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参数资料
| 型号： | A8437ECGLT |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/22页 |
| 文件大小： | 0K |
| 描述： | IC PHOTOFLASH CAP CHARGER WLCSP |
| 标准包装： | 24,000 |
| 应用： | 照相机闪光灯电容器充电器，Xenon |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-UFBGA，WLCSP |
| 供应商设备封装： | 12-WLCSP |
| 包装： | 带卷 (TR) |
A8437
Mobile Phone Xenon Photoflash Capacitor Charger
with IGBT Driver
Charge Time versus Battery Voltage
Transformer L p = 8 μ H, N = 10.2; C OUT = 20 μ F / 330 V UCC; T A =25°
Efficiency versus Battery Voltage
Transformer L p = 8 μ H, N = 10.2; C OUT = 20 μ F / 330 V UCC; T A =25°
3.5
3.0
2.5
R SET
(k Ω )
55
45
39
33.2
I P
(A)
≈ 0.65
≈ 0.8
≈ 0.9
≈ 1.0
71
70
69
68
67
66
65
2.0
1.5
1.0
26.7
≈ 1.2
64
63
62
61
60
59
R SET
(k Ω )
55
45
39
33.2
I P
(A)
≈ 0.65
≈ 0.8
≈ 0.9
≈ 1.0
0.5
0
58
57
56
55
26.7
≈ 1.2
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
V BAT (V)
C OUT = 20 μ F. For larger or smaller capacitances, charging time
scales proportionally.
V BAT (V)
Special low-profile transformer with relatively low inductance
(Lp= 8 μ H) and high winding resistance (Rp = 0.37 Ω ). Higher efficien-
cy can be achieved by using transformers with higher Lp, which reduces
switching frequency and therefore switching loses, and lower resistance,
which reduces conduction losses.
Average Input Current versus Battery Voltage
0.55
0.50
0.45
XFM L p = 8 μ H, N = 10.2, C OUT = 20 μ F 330 V UCC, T A =25°
0.40
0.35
0.30
0.25
0.20
0.15
R SET
(k Ω )
26.7
33.2
39
45
55
I P
(A)
≈ 1.2
≈ 1.0
≈ 0.9
≈ 0.8
≈ 0.65
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
V BAT (V)
An increase in I SWlim with respect to V BAT actually keeps the average input current
roughly constant throughout the battery voltage range. Normally, if I SWlim is kept
constant, the average current will drop as V BAT goes higher.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
8
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相关代理商/技术参数 |
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| A8437EEJTR-T | 功能描述:IC PHOTOFLASH CAP CHARGER 10TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 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:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| A8438 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver |
| A8438_06 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver |
| A8438_13 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver |
| A8438EEJTR-T | 功能描述:IC PHOTOFLASH CHARGER 10-MLP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
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