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參數(shù)資料
| 型號： | LT3467 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1A Low Noise High Current LED Charge Pump with Independent Torch/Flash Current Control |
| 中文描述： | 第1A低噪聲大電流LED的獨(dú)立火炬電荷泵/閃光電流控制 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 102K |
| 代理商： | LT3467 |
LTC 3216
1
3216fa
, LTC and LT 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 APPLICATIO
U
APPLICATIU
FEATURES
DESCRIPTIO
U
I
LED Torch/Camera Light Supply for Cell Phones,
PDAs and Digital Cameras
I
Generic Lighting and/or Flash/Strobe Applications
I
High Efficiency Operation: 1x, 1.5x or 2x Boost
Modes with Automatic Mode Switching
I
Ultralow Dropout I
LED
Current Control
I
Output Current up to 1A
I
Low Noise Constant Frequency Operation*
I
Independent Low Current/High Current
Programming and Enable Pins
I
Wide V
IN
Range: 2.9V to 4.4V
I
Open/Shorted LED Protection
I
LED Disconnect in Shutdown
I
Low Shutdown Current: 2.5
μ
A
I
4% LED Current Programming Accuracy
I
Automatic Soft-Start Limits Inrush Current
I
No Inductors
I
Tiny Application Circuit (All Components <1mm
Profile)
I
3mm
×
4mm 12-Lead DFN Package
1A Low Noise High C urrent
LED C harge Pump with
Independent Torch/Flash C urrent C ontrol
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 flying capaci-
tors, two programming resistors and two bypass capaci-
tors 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
switching optimizes efficiency by monitoring the voltage
across the LED current source and switching modes only
when I
LED
dropout is detected. The LTC3216 is available in
a small 3mm
×
Torch Mode Efficiency vs V
IN
EN1
0
1
0
1
C1
2.2
μ
F
C2
2.2
μ
F
C
IN
2.2
μ
F
C
CPO
4.7
μ
F
LED1
I
LED
V
IN
2.9V TO 4.4V
EN2
I
SET1
EN1
LTC3216
C1
+
C1
–
C2
+
C2
–
I
SET2
0 (SHUTDOWN)
200mA (TORCH)
600mA
800mA (FLASH)
EN2
0
0
1
1
3216 TA01a
LED1: LUMILEDS LXCL-PWF1 LUXEON FLASH
CPO
20k
1%
6.65k
1%
EN2 (FLASH)
EN1 (TORCH)
I
LED
V
IN
(V)
2.8
E
L
/
100
90
80
70
60
50
40
30
20
10
0
3.2
3.6
3.8
3216 TA01b
3.0
3.4
4.0
4.2
4.4
P
LED
/PIN
LUMILEDS LXCL-PWF1
V
F
= 3V TYP AT 200mA
I
LED
= 200mA
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PDF描述 |
|---|---|
| LT3467A | 1A Low Noise High Current LED Charge Pump with Independent Torch/Flash Current Control |
| LTC3216 | Single Cell 350mA LED Driver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3467A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:700mA Low Noise High Current LED Charge Pump |
| LT3467AEDDB#PBF | 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, Cut Tape 1.1A, 2.1MHz Boost Converter |
| LT3467AEDDB#TRMPBF | 功能描述:IC REG BOOST ADJ 1.1A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3467AEDDB#TRPBF | 功能描述:IC REG BOOST ADJ 1.1A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3467AES6 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.2V to 16V 6-Pin TSOT-23 |
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