LM3409 用于高功率 LED 驱动器的 PFET 降压控制器 | 德州仪器 TI.com.cn

LM3409
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用于高功率 LED 驱动器的 PFET 降压控制器

 

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描述

The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllers for step-down (buck) current regulators. They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage and fast output enable/disable function and a thermally enhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDs where forward currents up to 5 A are easily achievable.

The LM3409 devices use constant off-time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set.

For all available packages, see the orderable addendum at the end of the data sheet.

特性

  • LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q100 Grade 1 Qualified
  • 2-Ω, 1-A Peak MOSFET Gate Drive
  • VIN Range: 6 V to 42 V (LM3409, LM3409-Q1)
  • VIN Range: 6 V to 75 V (LM3409HV, LM3409HV-Q1)
  • Differential, High-Side Current Sense
  • Cycle-by-Cycle Current Limit
  • No Control Loop Compensation Required
  • 10,000:1 PWM Dimming Range
  • 250:1 Analog Dimming Range
  • Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
  • Low-Power Shutdown and Thermal Shutdown
  • Thermally Enhanced 10-Pin, HVSSOP Package

WEBENCH® Designer LM3409

  V in Lower V in Upper
6.0 ≤  V  V ≤ 42.0
环境温度  °C ≤ 125°C
光输出(可选)  流明

参数

与其它产品相比 通用照明LED驱动器 邮件 下载到电子表格中
Part number 立即下单 Input voltage (type) Vin (Min) (V) Vin (Max) (V) Iout (Max) (A) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Topology Dimming method Power factor correction (Min) Type Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Vref (V) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LM3409 立即下单 DC/DC     6     42     5     1.24     42     1     Buck     Analog
PWM    
    Controller
Inductive    
50     2000     2     0.248     3.73 / 3.44     Adjustable Switch Frequency
Enable/Shutdown
Precision Dimming Control
Thermal Shutdown    
-40 to 125     HVSSOP | 10
PDIP | 14    
10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)
14PDIP: 52 mm2: 8.26 x 6.35 (PDIP | 14)    
LM3409-Q1 立即下单 DC/DC     6     42     5     1.24     42     1     Buck Controller     Analog
PWM    
  Inductive     50     2000     2       3.73 / 3.44     Adjustable Switch Frequency
Enable/Shutdown
Precision Dimming Control
Thermal Shutdown    
-40 to 125     HVSSOP | 10     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)    
LM3409HV 立即下单 DC/DC     6     75     5     1.24     75     1     Buck     Analog
PWM    
    Controller
Inductive    
50     2000     2     0.248     3.73 / 3.44     Adjustable Switch Frequency
Enable/Shutdown
Precision Dimming Control
Thermal Shutdown    
-40 to 125     HVSSOP | 10     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)