参数资料
| 型号： | LTC3216EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC CHARGE PUMP LED 12-DFN |
| 标准包装： | 2,500 |
| 应用： | 转换器，高电流 LED |
| 输入电压： | 2.9 V ~ 4.4 V |
| 输出数： | 1 |
| 输出电压： | 多重 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN（4x3） |
| 包装： | 带卷 (TR) |
LTC3216
1A Low Noise High Current
LED Charge Pump with
Independent Torch/Flash Current Control
FEATURES
DESCRIPTION
n
n
n
n
n
n
n
n
n
n
n
n
n
n
High Ef?ciency Operation: 1x, 1.5x or 2x Boost
Modes with Automatic Mode Switching
Ultralow Dropout I LED Current Control
Output Current up to 1A
Low Noise Constant Frequency Operation
Independent Low Current/High Current
Programming and Enable Pins
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
Pro?le)
3mm × 4mm 12-Lead DFN Package
The LTC ? 3216 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 1A from a 2.9V to
4.4V input. Low external parts count (two ?ying capacitors,
two programming resistors and two bypass capacitors at
V IN and CPO) make the LTC3216 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. Independent high
and low current settings are programmed by two external
resistors. Shutdown mode and current output levels are
selected via two logic inputs.
An ultralow dropout current source maintains accurate
LED current at very low I LED voltages. Automatic mode
APPLICATIONS
switching optimizes ef?ciency by monitoring the voltage
across the LED current source and switching modes only
n
n
LED Torch/Camera Light Supply for Cell Phones,
PDAs and Digital Cameras
Generic Lighting and/or Flash/Strobe Applications
when I LED dropout is detected. The LTC3216 is available
in a small 3mm × 4mm 12-Lead DFN package.
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6411531.
TYPICAL APPLICATION
C1
2.2μF
C2
2.2μF
100
90
Torch Mode Ef?ciency vs V IN
I LED = 200mA
C1 +
C1 – C2 +
C2 –
80
2.9V TO 4.4V
C IN
2.2μF
V IN
LTC3216
CPO
C CPO
4.7μF
70
60
I LED
LED1
50
40
EN1 (TORCH)
EN1
30
EN2 (FLASH)
EN2
I SET1
I SET2
EN1
0
EN2
0
I LED
0 (SHUTDOWN)
20
10
P LED /PIN
LUMILEDS LXCL-PWF1
V F = 3V TYP AT 200mA
20k
1%
6.65k
1%
1
0
0
1
200mA (TORCH)
600mA
0
2.8 3.0
3.2
3.4 3.6
3.8
4.0
4.2
4.4
1
1
800mA (FLASH)
V IN (V)
3216 TA01a
LED1: LUMILEDS LXCL-PWF1 LUXEON FLASH
3216 TA01b
3216fc
1
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3221EDC-3.3#TRMPBF | IC REG SWITCHD CAP DBL 3.3V 6DFN |
| LTC3240EDC-2.5#TRPBF | IC REG MULTI CONFIG 2.5V 6DFN |
| LTC3250ES6-1.5#TRPBF | IC REG BUCK 1.5V 0.25A SOT23-6 |
| LTC3251EMSE-1.5#TRPBF | IC REG BUCK SWITCHED CAP 10MSOP |
| LTC3252EDE#TRPBF | IC REG BUCK SWITCHED CAP 12DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LTC3217EUD | 制造商:Linear Technology 功能描述:LED DRVR 4Segment 3.3V 16-Pin QFN EP |
| LTC3217EUD#PBF | 功能描述:IC LED DRVR FLASH TORCH 16QFN 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 |
| LTC3217EUD#TRPBF | 功能描述:IC LED DRVR FLASH TORCH 16QFN 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 |
| LTC3218 | 制造商:LINER 制造商全称:Linear Technology 功能描述:400mA Single Wire Camera LED Charge Pump |
发布紧急采购，3分钟左右您将得到回复。