收藏本站
LT3599
OPERATION
SHORTLED and OPENLED detection are disabled during
the start-up phase to avoid false ?ag generation. If an LED
string is open during normal operation, it will no longer
be used to regulate the output voltage. The output voltage
will regulate itself to ?nd the LED string with the lowest
LED pin voltage. Fault detection ( SHORTLED , OPENLED )
is updated when the PWM pin is high and latched when
the PWM pin is low.
APPLICATIONS INFORMATION
Inductor Selection
Table 1 lists several inductors that work well with the
LT3599, however, there are many other manufacturers and
devices that can be used. Consult each manufacturer for
detailed information on their entire range of parts. Ferrite
core inductors should be used to obtain the best ef?ciency.
Choose an inductor that can handle the necessary peak
current without saturating. Also, ensure that the inductor
has a low DCR (copper wire resistance) to minimize I 2 R
power losses. Values between 4.7μH and 22μH will suf?ce
for most applications.
During start-up, 11μA of current charges the external
soft-start capacitor. The SS pin directly limits the rate
of voltage rise on the V C pin, which in turn, limits the
peak switch current. Soft-start also enables switching
frequency foldback to provide a clean start-up for the
LT3599. Switch current limit protects the power switch
and external components.
Capacitor Selection
Low ESR (equivalent series resistance) ceramic capaci-
tors should be used at the output to minimize the output
ripple voltage. Use only X5R or X7R dielectrics, as these
materials retain their capacitance over wider voltage and
temperature ranges than other dielectrics. A 4.7μF to 10μF
output capacitor is suf?cient for most high output current
designs. Table 2 lists some suggested manufacturers.
Consult the manufacturers for detailed information on
their entire selection of ceramic parts.
Table 2. Recommended Ceramic Capacitor Manufacturers
Inductor manufacturers specify the maximum current
rating as the current where inductance falls by a given
percentage of its nominal value. An inductor can pass a
current greater than its rated value without damaging it.
Consult each manufacturer to determine how the maximum
inductor current is measured and how much more current
the inductor can reliably conduct.
Taiyo Yuden
AVX
Murata
Kemet
(408) 573-4150
www.t-yuden.com
(843) 448-9411
www.avxcorp.com
(770) 436-1300
www.murata.com
(408) 986-0424
www.kemet.com
Table 1. Recommended Inductors
L MAX DCR
CURRENT
Diode Selection
PART
B1015AS-100M
817FY-4R7M
744065100
74454068
74454010
CDH115-100
CDH74NP-120L
CDH74NP-150L
IHLP2020-BZ
IHLP2525-BD
(μH)
10
4.7
10
6.8
10
10
12
15
10
10
(Ω)
0.07
0.06
0.04
0.055
0.065
0.028
0.065
0.083
0.184
0.116
RATING (A)
2.2
2.26
3
2.2
2
3
2.45
2.10
2.3
2.5
VENDOR
TOKO
www.toko.com
Würth Electronics
www.we-online.com
Sumida
www.sumida.com
Vishay
www.vishay.com
Schottky diodes, with their low forward voltage drop and
fast switching speed, should be used for all LT3599 ap-
plications. Table 3 lists several Schottky diodes that work
well. The diode’s average current rating must exceed the
application’s average output current. The diode’s maximum
reverse voltage must exceed the application’s output volt-
age. A 2A diode is suf?cient for most designs. For PWM
dimming applications, be aware of the reverse leakage
current of the diode. Lower leakage current will drain the
output capacitor less, allowing for higher dimming range.
3599fe
10
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LT3743EFE#PBF IC LED DVR HP CONST CURR 28TSSOP
LT3745IUJ#TRPBF IC LED DVR 16CH 50MA 40QFN
LT3746IUHH#TRPBF IC LED DRIVER 32CHANNEL 56-QFN
LT3754IUH#TRPBF IC LED DVR 16CH 50MA 32QFN
LT3755EMSE#PBF IC LED DRVR HP CONS CURR 16-MSOP
LT3760EFE#PBF IC LED DVR WHT/CLR BCKLT 28TSSOP
LT3799IMSE#PBF IC LED DRIVER TRIAC DIM 16-MSOP
LT3956EUHE#PBF IC LED DVR BUCK BOOST 36-VQFN
相关代理商/技术参数
LT3599IFE#TRPBF 功能描述:IC LED DRVR WHITE BCKLGT 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
LT3599IFEPBF 制造商:Linear Technology 功能描述:LED Driver 40-Seg 3.3/5/9/../24V TSSOP28
LT3599IFE-PBF 制造商:LINER 制造商全称:Linear Technology 功能描述:4-Channel 120mA LED Driver with ±1.5% Current Matching
LT3599IFETRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:4-Channel 120mA LED Driver with ±1.5% Current Matching
LT3599IFE-TRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:4-Channel 120mA LED Driver with ±1.5% Current Matching
LT3599IUH 制造商:LINER 制造商全称:Linear Technology 功能描述:4-Channel 120mA LED Driver with ±1.5% Current Matching
LT3599IUH#PBF 功能描述:IC LED DRIVR WHITE BCKLGT 32-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
LT3599IUH#PBF 制造商:Linear Technology 功能描述:LED DRIVER BOOST PWM 2.06MH 制造商:Linear Technology 功能描述:LED DRIVER, BOOST, PWM, 2.06MHZ, QFN-32