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Automotive Four-Switch Buck-Boost LED Controller for Combination Head Lights

Automotive Seamless High-Voltage Buck-Boost Dual String LED Driver with more than 95% Efficiency

产品详情

主要特征

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 60
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 10
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 1000
Dimming Control Analog
PWM
VCURR_SENSE (mV) 200
POUT (W) 200
ICC (mA) (max) 6
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 200
440
Package/Pins TSSOP-CU/28
Budgetary
Price (See Notes)
2.9
缩小

简化框图

Technical Docs

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参量

Parametric specs for LED Drivers
VIN (V) (min) 5
VIN (V) (max) 60
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 10
PWM Dimming Freq. (kHz) (max) 2
Dimming Ratio (max) 1000
Dimming Control Analog
PWM
VCURR_SENSE (mV) 200
POUT (W) 200
ICC (mA) (max) 6
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 200
440
Package/Pins TSSOP-CU/28
Budgetary
Price (See Notes)
2.9

主要特征

  • Automotive Ready: AEC-Q100 Qualified
  • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Reducing Cost
    • Wide Input Voltage Range from 5V to 60V
    • H-Bridge Single Inductor Buck-Boost Architecture
    • Built-In Fast LED Current Limit During Transients
    • Suitable for Dual-String Applications with Time- Sharing
    • 28-Pin TSSOP with EP Pad
  • Full Featured Dual String Driver
    • Analog and PWM Dimming on Both Channels (EN1 and EN2)
    • Analog Devices’ Proprietary Control Architecture
    • Limits LED Current Spikes and Spike Duration in Dual-String Mode
    • Flicker-Free PWM Dimming with Spread- Spectrum
    • Dual Integrated pMOS Dimming FET Gate Driver
  • Protection Features and Wide Temperature Range Increase System Reliability
    • Short Circuit, Overvoltage, and Thermal Protection
    • Fast LED Current Limit and Input Current Limiter
  • -40°C to +150°C Operating Junction-Temperature Range

应用/用途

  • Combination Automotive Head Lamps

描述

The MAX25603 is a synchronous four-switch, buckboost LED driver controller suitable for multifunction automotive combination head lamps. The controller regulates the LED current for LED string voltages from 0V to 60V. The MAX25603 can be used as a seamless buck-boost LED driver for applications that require an efficient buck-boost LED driver with synchronous rectification. The MAX25603 is ideal for high-power applications that require a current source with PWM dimming capability.

The device provides seamless transition between buck, boost, and buck-boost modes depending on the ratio of input to output voltage. The MAX25603 is ideal for LED driver applications in automotive, industrial, and other LED lighting applications. A fault flag indicates open LED or thermal shutdown conditions. The device uses Analog Devices’ proprietary average-current-mode control scheme and allows adjustable 200kHz to 440kHz fixedfrequency operation. In addition, ±6% triangular spreadspectrum is added internally to the oscillator to improve EMI performance. The MAX25603 provides both analog and digital PWM dimming in dual string applications with time sharing. A single device can be used to power a daytime running light (DRL), position light, high beam, and low beam in an automotive front headlamp. The MAX25603 integrates two high-side pMOS drivers for PWM dimming applications that require fast rising and falling edges of the LED current. It also features robust output open and short protection, is AEC qualified, and is suitable for automotive applications.

The MAX25603 uses Analog Devices’ proprietary architecture to limit LED current overshoots and overshoot durations during switchover in dual-string applications in time-sharing mode. In multistring applications in time-sharing mode, LED current overshoots during switchover between strings is minimized by an Analog Devices’ proprietary control scheme.

简化框图

MAX25603: Simplified Application Diagram MAX25603: Simplified Application Diagram Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

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

采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com