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参数资料
| 型号： | LTC3452EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER PHOTO FLASH 20-QFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 7 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 900kHz ~ 1.1MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 4.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LTC3452
PI FU CTIO S
V IN (Pin 1): Signal Voltage Input Supply Pin (2.7V ≤ V IN ≤
5.5V). Recommended bypass capacitor to GND is 2.2 μ F
ceramic or larger. Connect to PV IN (Pin 20).
EN L (Pin 2): Enable Input Pin and PWM Brightness Control
for Low Power LED Bank. Active high. For constant I MAXL
operation, connect the EN L pin to V IN (or any voltage
>1.2V). For EN L voltage <0.2V, all low power bank LED
current source outputs are Hi-Z (if both EN L and EN H are
<0.2V, the part is in shutdown and the input supply current
drops to ~6 μ A). For brightness control between zero
current and I MAXL , drive the EN L pin with a PWM waveform
of frequency ≥ 10kHz. The low power LED bank currents
will be equal to a percentage of I MAXL as given in Table 1.
The EN L pin is high impedance and should not be floated.
I SETL (Pin 3): Low Power LED Bank Current Programming
Pin. A resistor to ground programs each low power bank
current source output maximum to I LEDLx|MAX = 256 ?
(0.8V/R ISETL ). Enabled by EN L (Pin 2). PWM brightness
control also via EN L .
LED L1 to LED L5 (Pins 4 to 8): Individual Low Dropout
Current Source Outputs for Low Power LED Bank Current
Biasing. Connect each low power LED between V OUT and
an individual LED Lx pin. Unused LED Lx outputs should be
connected to V OUT .
GND (Pins 9 and 11): Signal Ground Pins. Connect
together and to PGND (Pin 18) and Exposed Pad ground
(Pin 21).
I SETH (Pin 13): High Power LED Bank Current Program-
ming Pin. A resistor to ground programs each high power
bank current source output to I LEDHx = 768(0.8V/R ISETH ).
Enabled by EN H (Pin 14).
EN H (Pin 14): Enable Input Pin for High Power LED Bank.
Active high. The EN H pin is high impedance and should not
be floated.
V C (Pin 15): Compensation Point for the Internal Error
Amplifier Output. Recommended compensation capacitor
to GND is 0.1 μ F ceramic or larger.
V OUT (Pin 16): Buck-Boost Output Pin. Recommended
bypass capacitor to GND is 4.7 μ F ceramic.
SW2 (Pin 17): Switching Node Pin. Connected to internal
power switches C and D. External inductor connects
between SW1 and SW2. Recommended value is 4.7 μ H.
PGND (Pin 18): Power Ground Pin. Connect to GND (Pins
9 and 11).
SW1 (Pin 19): Switching Node Pin. Connected to internal
power switches A and B. External inductor connects
between SW1 and SW2. Recommended value is 4.7 μ H.
PV IN (Pin 20): Power Voltage Input Supply Pin. Connect to
V IN (Pin 1).
Exposed Pad (Pin 21): Heat Sink Ground. Connect to GND
(Pins 9 and 11) and solder to PCB ground for electrical
contact and rated thermal performance.
LED H1 , LED H2 (Pins 10, 12): Individual Low Dropout
Current Source Outputs for High Power LED Bank Current
Biasing. Connect each high power LED between V OUT and
an individual LED Hx pin. Unused LED Hx outputs should be
connected to V OUT .
3452f
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3453 | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Low Noise High Current LED Charge Pump |
| LTC3453EUF | 制造商:Linear Technology 功能描述:LED DRVR 4Segment 3.3V/5V 16-Pin QFN EP |
| LTC3453EUF#PBF | 功能描述:IC LED DRIVER PHOTO FLASH 16-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 |
| LTC3453EUF#TRPBF | 功能描述:IC LED DRIVER PHOTO FLASH 16-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 |
| LTC3454 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Synchronous Buck-Boost High Current LED Driver |
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