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| 型号： | LT3496EUFD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT/RGB BCKLT 28-QFN |
| 标准包装： | 73 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 3 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | RGB |
| 频率： | 330kHz ~ 2.1MHz |
| 电源电压： | 3 V ~ 30 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN（4x5） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
LT3496
APPLICATIONS INFORMATION
Table 1. Ceramic Capacitor Manufacturers
Table 2. Surface Mount Inductors
VENDOR
Taiyo Yuden
AVX
Murata
Kemet
TYPE
Ceramic
Ceramic
Ceramic
Ceramic
SERIES
X5R, X7R
X5R, X7R
X5R, X7R
X5R, X7R
PART NUMBER
Sumida
CMD4D06
CDRH3D16
VALUE
(μH)
2.2
3.3
2.2
DCR
( Ω MAX)
0.116
0.174
0.072
I RMS (A)
0.95
0.77
1.20
SIZE
W × L × H (mm3)
3.5 × 4.3 × 0.8
3.8 × 3.8 × 1.8
Inductor Selection
3.3
0.085
1.10
Several inductors that work well with the LT3496 are listed
in Table 2. However, there are many other manufacturers
and devices that can be used. Consult each manufacturer
for more detailed information and their entire range of
parts. Ferrite core inductors should be used to obtain the
best efficiency. Choose an inductor that can handle the
necessary peak current without saturating, and ensure that
the inductor has a low DCR (copper-wire resistance) to
minimize I 2 R power losses. An inductor with a magnetic
shield should be used to prevent noise radiation and cross
coupling among the three channels.
Diode Selection
The Schottky diode conducts current during the interval
when the switch is turned off. Select a diode V R rated
for the maximum SW voltage. It is not necessary that
the forward current rating of the diode equal the switch
current limit. The average current, I F , through the diode
is a function of the switch duty cycle. Select a diode with
forward current rating of:
CDRH4D28
CDRH5D28
CooperET
SD3112
SD14
SD20
SD25
Taiyo Yuden
NR3015
NP04SZB
4.7
10
15
22
33
2.2
3.3
4.7
10
15
22
33
2.2
4.7
4.7
10
15
22
0.105
0.128
0.149
0.122
0.189
0.140
0.165
0.246
0.2058
0.1655
0.2053
0.2149
0.06
0.12
0.075
0.100
0.180
0.210
0.90
1.00
0.76
0.9
0.75
0.97
0.90
0.74
1.1
1.25
1.12
1.11
1.48
1.02
1.6
1.2
0.95
0.77
5.0 × 5.0 × 3.0
6.0 × 6.0 × 3.0
3.1 × 3.1 × 1.2
5.0 × 5.0 × 1.4
5.0 × 5.0 × 2.0
5.0 × 5.0 × 2.5
3.0 × 3.0 × 1.5
4.0 × 4.0 × 1.8
I F = I L ? (1 – D)
where I L is the inductor current.
If using the PWM feature for dimming, it is important to
consider diode leakage, which increases with the tem-
perature from the output during the PWM low interval.
Therefore, choose the Schottky diode with sufficient low
leakage current. Table 3 shows several Schottky diodes
that work well with the LT3496.
Table 3. Schottky Diodes
PART NUMBER V R (V)
ZETEX
ZLLS350 40
ZLLS400 40
I F (A)
0.38
0.52
PACKAGE
SOD523
SOD323
3496ff
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3496EUFD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Output LED Driver |
| LT3496HUFD#PBF | 功能描述:IC LED DVR WHT/RGB BCKLT 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 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:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| LT3496HUFD#TRPBF | 功能描述:IC LED DVR WHT/RGB BCKLT 28-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 |
| LT3496IFE#PBF | 功能描述:IC LED DRVR WT/RGB BCKLT 28TSSOP 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 |
| LT3496IFE#TRPBF | 功能描述:IC LED DRVR WT/RGB BCKLT 28TSSOP 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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