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| 型号： | LT3492IUFD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER TRIPLE 28QFN |
| 标准包装： | 73 |
| 恒定电流： | 是 |
| 拓扑： | PWM，SEPIC，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 |
LT3492
Triple Output LED Driver
with 3000:1 PWM Dimming
FEATURES
DESCRIPTION
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True Color PWM? Dimming Delivers Up to 3000:1
Dimming Ratio
Built-In Gate Driver for PMOS LED Disconnect
Three Independent Driver Channels with 600mA,
60V 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 and TSSOP Packages
The LT ? 3492 is a triple output DC/DC converter designed
to operate as a constant-current source and is ideal for
driving LEDs. The LT3492 works in buck, boost or buck-
boost mode. The LT3492 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 ef?ciency and
external component size.
The external PWM input provides 3000:1 LED dimming
on each channel. 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 LT3492 is programmed with
an external sense resistor.
APPLICATIONS
The CTRL pin is used to adjust the LED current either for
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RGB Lighting
Billboards and Large Displays
Automotive and Avionic Lighting
Constant-Current Sources
analog dimming or overtemperature protection.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. True Color PWM is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 7199560, 7321203, and others pending.
TYPICAL APPLICATION
High Dimming Ratio Triple Output Buck-Mode LED Power Supply
PV IN
58V
ISP1
330mΩ
ISP2
330mΩ
ISP3
330mΩ
1μF
3
TG1
ISN1
TG2
ISN2
ISN3
TG3
3000:1 PWM Dimming at 100Hz
PWM
5V/DIV
10 LEDs
0.3A
0.47μF 0.47μF
0.3A
0.3A
0.47μF
I LED
0.2A/DIV
I L
33μH
SW1
ISP1-3
33μH
SW2
33μH
SW3
TG1-3
V C1-3
0.5A/DIV
1μs/DIV
3492 TA01b
V IN
3V TO 24V
1μF
ISN1-3
V IN
PWM1-3
SHDN
LT3492
V REF
CTRL1-3
FADJ
150k
10k
49.9k
1.3MHz
680pF
GND
OVP1-3
3492 TA01a
3492fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3492IUFDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Output LED Driver with 3000:1 PWM Dimming |
| LT3493 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3493-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3493EDCB | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 36V 6-Pin DFN EP |
| LT3493EDCB#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 36V 6-Pin DFN EP 制造商:Linear Technology 功能描述:IC STEP-DOWN PWM DC/DC CONVERTER DFN-6 制造商:Linear Technology 功能描述:IC, STEP-DOWN PWM DC/DC CONVERTER, DFN-6 制造商:Linear Technology 功能描述:IC, STEP-DOWN PWM DC/DC CONVERTER, DFN-6; Primary Input Voltage:36V; No. of Outputs:1; Output Current:1.2A; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited; Package / Case:6-DFN ;RoHS Compliant: Yes |
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