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参数资料
| 型号： | LT3755IMSE-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONS CURR 16-MSOP |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | 回扫，低端，PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 白色 LED |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.5 V ~ 40 V |
| 输出电压： | 75V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
LT3755/LT3755-1/LT3755-2
TYPICAL PERFORMANCE CHARACTERISTICS
ISP/ISN Input Bias Current
vs CTRL Voltage
T A = 25°C, unless otherwise noted.
INTV CC Dropout Voltage
vs Current, Temperature
40
0
30
ISP
ISN
–0.5
–1.0
T A = 25°C
T A = 125°C
T A = –45°C
20
10
–1.5
–2.0
T A = 150° C
0
0
0.5
1
1.5
2
–2.5
0
V IN = 7V
5
10 15
20
25
30
CTRL (V)
37551 G19
LDO CURRENT (mA)
37551 G20
PIN FUNCTIONS
(MSOP/QFN)
PWMOUT (Pin 1/Pin 11): Buffered Version of PWM Signal
for Driving LED Load Disconnect NMOS or Level Shift.
This pin also serves in a protection function for the FB
overvoltage condition—will toggle if the FB input is greater
than the FB regulation voltage (V FB ) plus 60mV (typical).
The PWMOUT pin is driven from INTV CC . Use of a FET with
gate cut-off voltage higher than 1V is recommended.
FB (Pin 2/Pin 12): Voltage Loop Feedback Pin. FB is
intended for constant-voltage regulation or for LED protec-
tion/open LED detection. The internal transconductance
amplifier with output VC will regulate FB to 1.25V (nominal)
through the DC/DC converter. If the FB input is regulating
the loop, the OPENLED pull-down is asserted. This ac-
tion may signal an open LED fault. If FB is driven above
the FB threshold (by an external power supply spike, for
example), the OPENLED pull-down will be de-asserted and
the PWMOUT pin will be driven low to protect the LEDs
from an overcurrent event. Do not leave the FB pin open.
If not used, connect to GND.
ISN (Pin 3/Pin 13): Connection Point for the Negative
Terminal of the Current Feedback Resistor. If ISN is greater
than 2.9V, the LED current can be programmed by I LED =
100mV/R LED when V CTRL > 1.2V or I LED = (V CTRL –100mV)/
(10 ? R LED ) when V CTRL ≤ 1V. Input bias current is typi-
cally 25μA. Below 3V, ISN is an input to the short-circuit
protection feature that forces GATE to 0V if ISP exceeds
ISN by more than 150mV (typ).
ISP (Pin 4/Pin 14): Connection Point for the Positive
Terminal of the Current Feedback Resistor. Input bias
current is dependent upon CTRL pin voltage as shown
in the TPC. ISP is an input to the short-circuit protection
feature when ISN is less than 3V.
VC (Pin 5/Pin 15): Transconductance Error Amplifier
Output Pin Used to Stabilize the Voltage Loop with an RC
Network. This pin is high impedance when PWM is low, a
feature that stores the demand current state variable for
the next PWM high transition. Connect a capacitor between
this pin and GND; a resistor in series with the capacitor is
recommended for fast transient response.
37551fd
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3755IMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:40VIN, 75VOUT LED Controller |
| LT3755IMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:40VIN, 75VOUT LED Controller |
| LT3755IUD#PBF | 功能描述:IC LED DRVR HP CONST CURR 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 |
| LT3755IUD#PBF | 制造商:Linear Technology 功能描述:LED DRIVER PWM 1MHZ QFN-16 制造商:Linear Technology 功能描述:LED DRIVER, PWM, 1MHZ, QFN-16 |
| LT3755IUD#TRPBF | 功能描述:IC LED DRVR HP CONST CURR 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 |
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