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参数资料
| 型号： | LTC3218EDDB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR FLASH TORCH 10DFN |
| 标准包装： | 500 |
| 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： | 闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 2.9 V ~ 4.5 V |
| 输出电压： | 5.3V |
| 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-DFN-EP（3x2） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LTC3218
APPLICATIONS INFORMATION
η IDEAL ≡ LED =
≈ LED
At moderate to high output power, the quiescent current
of the LTC3218 is negligible and the expression above is
valid.
Once dropout is detected at the I LED pin, the LTC3218
enables the charge pump in 2x mode.
In 2x boost mode, the ef?ciency is similar to that of a
linear regulator with an effective input voltage of 2 times
the actual input voltage. In an ideal 2x charge pump, the
power ef?ciency would be given by:
P V LED ? I LED V
P IN V IN ? 2 ? I LED 2V IN
Thermal Management
For higher input voltages and maximum output current,
there can be substantial power dissipation in the LTC3218.
If the junction temperature increases above approximately
165°C, the thermal shutdown circuitry will automatically
deactivate the output. To reduce maximum junction tem-
perature, a good thermal connection to the PC board is
recommended. Connecting the Exposed Pad to a ground
plane and maintaining a solid ground plane under the
device can reduce the thermal resistance of the package
and PC board considerably.
PACKAGE DESCRIPTION
DDB Package
10-Lead Plastic DFN (3mm × 2mm)
(Reference LTC DWG # 05-08-1722 Rev ?)
0.64 ± 0.05
(2 SIDES)
3.00 ± 0.10
(2 SIDES)
R = 0.05
TYP
R = 0.115
TYP
6
10
0.40 ± 0.10
0.70 ± 0.05
2.55 ± 0.05
1.15 ± 0.05
PIN 1 BAR
TOP MARK
2.00 ± 0.10
(2 SIDES)
PIN 1
R = 0.20 OR
5
0.25 ± 0.05
0.50 BSC
PACKAGE
OUTLINE
(SEE NOTE 6)
0.200 REF
0.75 ± 0.05
0.64 ± 0.05
(2 SIDES)
0.25 ± 0.05
1
0.25 × 45 °
CHAMFER
(DDB10) DFN 0905 REV ?
0.50 BSC
2.39 ± 0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0 – 0.05
2.39 ± 0.05
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE
3218fb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
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| LTC3219EUD#TRPBF | 功能描述:IC LED DRIVR QVGA DISPLAY 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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