參數(shù)資料
型號(hào)： LTC3496IUFD#TRPBF
廠(chǎng)商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 2300 kHz SWITCHING FREQ-MAX, PQCC28
封裝： 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-28
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 296K
代理商： LTC3496IUFD#TRPBF
LT3496
1
3496f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Triple Output LED Driver
The LT
3496 is a triple output DC/DC converter designed
to operate as a constant-current source and is ideal for
driving LEDs. The LT3496 works in buck, boost or buck-
boost mode. The LT3496 uses a xed frequency, current
mode architecture resulting in stable operation over a
wide range of supply and output voltages. A frequency
adjust pin allows the user to program switching frequency
between 330kHz and 2.1MHz to optimize efciency and
external component size.
The LT3496 supports 3000:1 dimming control on each
channel. Each of the three regulators is independently
operated by that channel’s PWM signal. The PWM feature
allows precise adjustment of the color mixing or dimming
ratio of the LED source. Each of the three channels has
a built-in gate driver to drive an external LED-disconnect
P-channel MOSFET, allowing high dimming range. The
output current range of each channel of the LT3496 is
programmed with an external sense resistor.
The CTRL pin is used to adjust the LED current either for
analog dimming or overtemperature protection.
■ True Color PWM
TM Dimming Delivers Up to 3000:1
Dimming Ratio
■ Built-In Gate Driver for PMOS LED Disconnect
■ Three Independent Driver Channels with 750mA,
45V Internal Switches
■ Operates in Buck, Boost, Buck-Boost Modes
■ CTRL Pin Accurately Sets LED Current Sense
Threshold Over a Range of 10mV to 100mV
■ Adjustable Frequency: 330kHz to 2.1MHz
■ Open LED Protection
■ Wide Input Voltage Range:
Operation from 3V to 30V
Transient Protection to 40V
■ Surface Mount Components
■ 28-Lead (4mm
× 5mm) QFN Package
■ RGB Lighting
■ Billboards and Large Displays
■ Automotive and Avionic Lighting
■ Constant-Current Sources
High Dimming Ratio Triple Output LED Power Supply
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Patent Pending.
3000:1 PWM Dimming at 120Hz
0.5A
0.47
F
0.47
F
LED1
200m
200m
TG1
PVIN
42V
7 LEDs
10
H
CAP1
0.5A
LED2
TG2
10
H
CAP2
0.5A
0.47
F
LED3
1
F
×3
200m
0.1
F
3496 TA01a
TG3
10
H
CAP3
SW1
SW2
LT3496
GND
SW3
TG1-3
VC1-3
VREF
CTRL1-3
FADJ
OVP1-3
CAP1-3
LED1-3
VIN
PWM1-3
SHDN
PWM1-3
SHDN
VIN
3V TO 24V
1
F
PWM
5V/DIV
0.5
s/DIV
3496 TA01b
ILED
0.5A/DIV
IL
0.5A/DIV
相關(guān)PDF資料
PDF描述
LTC3496EUFD#PBF SWITCHING CONTROLLER, 2300 kHz SWITCHING FREQ-MAX, PQCC28
LTC3496EUFD#TRPBF SWITCHING CONTROLLER, 2300 kHz SWITCHING FREQ-MAX, PQCC28
LTC3521EFE#TRPBF SWITCHING REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PDSO20
LTC3521EUF#TRPBF SWITCHING REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PQCC24
LTC3521IFE#PBF SWITCHING REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LTC3499BEDD#PBF 功能描述:IC REG BOOST SYNC ADJ 0.75A 8DFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱(chēng):296-25628-2
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