Datasheet > MAX25561

MAX25561

更新时间： 2024-11-22 17:02:07

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
56页	1324K
描述
6 x 220mA, ASIL B LED Backlight Driver with Boost Controller

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中文翻译

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MAX25561 数据手册

MAX25561

6 x 220mA, ASIL B LED Backlight

Driver with Boost Controller

Benefits and Features

General Description

•

Operates Down to 3V on Battery Input while

Maintaining 5V Gate Drive

The MAX25561 is a 6-channel LED backlight driver with

an integrated current-mode boost controller that

operates over a switching frequency range of 400kHz to

2.2MHz and incorporates spread spectrum. Selectable

phase-shifting of the output channels is included to

reduce EMI. The MAX25561 provides up to 220mA per

channel. The device is capable of operating down to very

low battery voltages by virtue of a unique input voltage

switching scheme.

• Wide Boost Duty-Cycle Range

•

Boost or SEPIC Current-Mode DC-DC Controller

• 400kHz to 2.2MHz Operating Frequency Range

• Optional Spread Spectrum

• Can Be Synchronized to an External Clock

•

LED Current Sinks

• Up to 220mA Output Current per String

• Low OUT_ Regulation Voltage

• Optional Phase-Shifting Between Channels

Extensive diagnostics and an I C interface are included

to assist with system ASIL B compliance.

•

15000:1 Dimming Ratio at 200Hz

External or Internal (I C) Dimming

The MAX25561 is available in a compact TQFN package

and operates over the -40°C to +125°C temperature

range.

>15000:1 Dimming Ratio with Hybrid Dimming

Integrated Charge-Pump to Drive Series nMOSFET

Temperature Foldback Using External NTC

Temperature Sensor

Applications

•

Fast Startup Option without I C Intervention Using

•

Automotive Instrument Clusters

Automotive Central Information Displays

Automotive Head-Up Displays

EN Pin Only

FLTB Output Provides Diagnostic Information

• Shorted or Open LEDs

• Any OUT_ Pin Shorted to GND

• IREF/RT Resistor Out of Range

• Thermal Warning/Shutdown

• Undervoltage/Overvoltage on Boost Output

• Bandgap Out-of-Range/Internal Oscillator Failure

• V18 Internal Supply out-of-Range

• Input Overcurrent (Measured at Boost Input

Using External Sense Resistor)

• Input/Output PWM Comparison

• Continuous Output Current Measurement and

Current Mismatch (Shutdown/Flag)

•

I C Interface with CRC

• Readback of Measured DIM Pin Duty Cycle and

Frequency

Compact TQFN Package

Ordering Information appears at end of data sheet.

19-101727; Rev 0; 10/23

12 3 4 5 6 7...56

中文翻译

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