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参数资料
| 型号： | LTC3215EDD#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT 10-DFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，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，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 600kHz ~ 1.2MHz |
| 电源电压： | 2.9 V ~ 4.4 V |
| 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（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LTC3215
700mA Low Noise High
Current LED Charge Pump
High Efficiency Operation: 1x, 1.5x or 2x Boost
Ultralow Dropout I LED Current Control
Output Current up to 700mA
Low Noise Constant Frequency Operation*
Wide V IN Range: 2.9V to 4.4V
Open/Shorted LED Protection
LED Disconnect in Shutdown
Low Shutdown Current: 2.5μA
4% LED Current Programming Accuracy
Automatic Soft-Start Limits Inrush Current
No Inductors
Tiny Application Circuit (All Components <1mm
3mm × 3mm 10-Lead DFN Package
LED Torch/Camera Light Supply for Cell Phones,
General Lighting and/or Flash/Strobe Applications
FEATURES
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Modes with Automatic Mode Switching
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Profile)
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APPLICATIONS
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PDAs and Digital Cameras
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TYPICAL APPLICATION
DESCRIPTION
The LTC ? 3215 is a low noise, high current charge pump
DC/DC converter designed to power high current LEDs.
The part includes an accurate programmable current source
capable of driving loads up to 700mA from a 2.9V to 4.4V
input. Low external parts count (two flying capacitors, one
programming resistor and two bypass capacitors) makes
the LTC3215 ideally suited for small, battery-powered
applications.
Built-in soft-start circuitry prevents excessive inrush cur-
rent during start-up. High switching frequency enables
the use of small external capacitors. LED current is pro-
grammed with an external resistor. The LED is disconnected
from V IN during shutdown.
An ultralow dropout current source maintains accurate
LED current at very low I LED voltages. Automatic mode
switching optimizes efficiency by monitoring the voltage
across the LED current source and switching modes only
when I LED dropout is detected. The LTC3215 is available
in a low profile 3mm × 3mm 10-Lead DFN package.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6411531.
C1
2.2μF
C2
2.2μF
100
Efficiency vs V IN
C1 +
C1 – C2 +
C2 –
90
80
I LED = 200mA
2.9V TO 4.4V
C IN
2.2μF
V IN
LTC3215
CPO
I LED
LED1
I LED
200mA
C CPO
4.7μF
70
60
50
40
DISABLE ENABLE
EN
I SET
30
20
20k
1%
LED1: AOT2015
3215 TA01a
10
0
LED = AOT2015
V F = 3V TYP AT 200mA
2.8 3.0 3.2 3.4 3.6
V IN (V)
3.8
4.0
4.2
4.4
3215 TA01b
3215fc
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3216 | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Low Noise High Current LED Charge Pump |
| LTC3216EDE | 制造商:Linear Technology 功能描述:LED DRVR 1Segment 3.3V 12-Pin DFN EP |
| LTC3216EDE#PBF | 功能描述:IC CHARGE PUMP LED 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3216EDE#TRPBF | 功能描述:IC CHARGE PUMP LED 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3217 | 制造商:LINER 制造商全称:Linear Technology 功能描述:600mA Low Noise Multi-LED Camera Light Charge Pump |
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