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4-Channel, Low-Voltage, 120mA LED Backlight Drivers with Integrated Boost Converter

Industry Best Efficiency, Integrated Boost Converter LED Driver

产品详情

主要特征

Parametric specs for LED Drivers
VIN (V) (min) 3
VIN (V) (max) 36
Max. No. of LEDs 40
# LED Channels 4
Regulation Topology Inductor Based
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.12
PWM Dimming Freq. (kHz) (max) 20
Dimming Ratio (max) 16666
Dimming Control Analog
PWM
VDROPOUT (mV) (typ) 750
POUT (W) 15
ICC (mA) (max) 10
LED String Volt. (V) (max) 40
Switching Frequency (kHz) 400
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
0.83
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参量

Parametric specs for LED Drivers
VIN (V) (min) 3
VIN (V) (max) 36
Max. No. of LEDs 40
# LED Channels 4
Regulation Topology Inductor Based
LED Configuration Series-Parallel
ILED per Channel (A) (max) 0.12
PWM Dimming Freq. (kHz) (max) 20
Dimming Ratio (max) 16666
Dimming Control Analog
PWM
VDROPOUT (mV) (typ) 750
POUT (W) 15
ICC (mA) (max) 10
LED String Volt. (V) (max) 40
Switching Frequency (kHz) 400
2200
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
0.83

主要特征

  • Operate down to 3V on Battery Input after Start-Up
    • Wide Boost Duty Cycle to Support Low Input Voltage
  • Boost or SEPIC Current-Mode DC-DC Controller
    • 400kHz to 2.2MHz Operating Frequency Range
    • Spread Spectrum Available
    • Can Be Synchronized to an External Clock
  • LED Current Sinks
    • Up to 120mA Output Current per String
    • Low OUT_ Regulation Voltage for Best Efficiency
    • Optional Phase-Shifting of Outputs
  • 16667:1 Dimming Ratio at 200Hz
  • NTC Input for LED Current Foldback
  • Analog Dimming Capable
  • Built-In Automatic Fading Functionality
  • FLTB Output Provides Diagnostic Information
    • Shorted or Open LEDs
    • Thermal Shutdown
    • Output Undervoltage
  • Compact, 4mm x 4mm TQFN Package
  • AEC-Q100 Grade 1

应用/用途

  • 汽车中心显示器
  • 汽车抬头显示
  • 汽车仪表盘

描述

The MAX25510/MAX25511 are 4-channel, white-LED backlight drivers with an integrated current-mode boost converter that operate over a switching frequency range of 400kHz to 2.2MHz and incorporate spread spectrum. Phase-shifting of the output channels is included as an option to further reduce EMI.

The devices provide up to 120mA per channel and include a control output for an external nMOS series switch. These devices are capable of operating down to 3V after start-up.

The MAX25510 has a boost current limit of 3A (min), while the MAX25511 implements a higher minimum current limit of 4.5A for increased output power.

The MAX25510/MAX25511 are available in a compact TQFN package and operate over the temperature range -40°C to +125°C.

简化框图

Technical Docs

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心