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参数资料
| 型号： | LT3598IFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 24TSSOP |
| 标准包装： | 62 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 200kHz ~ 2.5MHz |
| 电源电压： | 3 V ~ 30 V |
| 输出电压： | 44V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
LT3598
PIN FUNCTIONS
(QFN/ TSSOP)
LED1-6 (Pins 1, 2, 3, 4, 5, 6/Pins 4, 5, 6, 7, 8, 9): LED
String Output. Connect the bottom cathode of each LED string
to these pins. Tie pins to V OUT if the string is not used.
OPENLED (Pin 7/Pin 10): Open LED Flag When Any LED
String Opens. The output is open-collector. Tie a resistor
to other supply for open LED ?ag function.
I SET (Pin 8/Pin 11): Programs LED Current for Each String.
Connect a 14.7k resistor between I SET and GND to program
each LED string current to 20mA. A 47pF capacitor on the
I SET pin reduces current ripple in each LED string.
CTRL (Pin 9/Pin 12): LED Current Control. If the CTRL
pin is not used, tie this pin to V REF through a 10k to 20k
resistor.
V C (Pin 10/Pin 13): Error Ampli?er Output Pin. Tie the
external compensation network to this pin.
FB (Pin 11/Pin 14): Feedback Pin for Overvoltage
Protection. Reference voltage is 1.230V. Connect the
resistive divider tap here. Minimize trace area at FB. Set V OUT
according to V OUT = 1.230(1 + R2/R1) when overvoltage
protection occurs (see Figure 2).
T SET (Pin 12/Pin 15): An external resistor divider from
V REF programs a decrease in LED current versus internal
junction temperature (setting temperature breakpoint and
slope). If the T SET pin is not used, tie this pin to V REF .
NC (Pin 13/Pin 16): No Connection.
SYNC (Pin 14/Pin 17): Frequency Synchronization Pin.
This input allows for synchronizing the operating frequency
to an external clock. The R T resistor should be chosen to
program a switching frequency 20% slower than SYNC
pulse frequency. This pin should be grounded if this
feature is not used.
PWM (Pin 15/Pin 18): Input Pin for PWM Dimming Control.
Above 1V allows converter switching and below 0.4V
disables switching with V C pin level maintained. A PWM
signal driving the PWM pin provides accurate dimming
control. The PWM signal can be driven from 0V to 5V. If
unused, the pin should be connected to V REF .
RT (Pin 16/Pin 19): A resistor to ground programs
switching frequency between 200kHz and 2.5MHz. For
SYNC function, choose the resistor to program a frequency
20% slower than the SYNC pulse frequency. Do not leave
this pin open.
SS (Pin 17/Pin 20): Soft-Start Pin. Place a soft-start
capacitor here. Upon start-up, a 10μA current charges
the capacitor. Use a larger capacitor for slower start-up.
Leave open if not used.
V REF (Pin 18/Pin 21): Bandgap Voltage Reference.
Internally set to 1.230V. This pin can supply up to 100μA.
Can be used to program the CTRL pin voltage using resistor
dividers to ground.
GND (Pin 19/Pin 22): Ground. Tie directly to local ground
plane.
SHDN (Pin 20/Pin 23): Shutdown Pin. Tie to 1.6V or more
to enable the device. Tie below 0.4V or less to disable
device. Do not ?oat this pin.
V IN (Pin 21/Pin 24): Input Supply Pin. Must be locally
bypassed with a capacitor to ground.
SW (Pin 22/Pin 1): Switch Pin. This is the collector of the
internal NPN power switch. Minimize the metal trace area
connected to this pin to minimize EMI.
V OUT (Pin 23/ Pin 2): Output Pin. This pin provides power
to all LEDs.
V O_SW (Pin 24/ Pin 3): Drain of an Internal PMOS. The
internal PMOS disconnects the feedback resistors from
the V OUT pin during shutdown and the PWM transitioned
to low.
Exposed Pad (Pin 25/ Pin 25): Ground. The Exposed Pad
must be soldered to the PCB.
3598fb
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3598IFETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6-String 30mA LED Driver with 1.5% Current Matching |
| LT3598IUF#PBF | 功能描述:IC LED DRIVR WHITE BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
| LT3598IUF#TRPBF | 功能描述:IC LED DRIVR WHITE BCKLGT 24-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 |
| LT3598IUFPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6-String 30mA LED Driver with 1.5% Current Matching |
| LT3598IUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6-String 30mA LED Driver with 1.5% Current Matching |
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