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MAX25511

INTERACTIVE Data Sheet Buy Now Download

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

Industry Best Efficiency, Integrated Boost Converter LED Driver

INTERACTIVE Data Sheet

Product Details

See parametric specs for LED Drivers

Key Features

See parametric specs for LED Drivers

Parametric specs for LED Drivers

V_IN (V) (min)	3
V_IN (V) (max)	36
Max. No. of LEDs	40
# LED Channels	4
Regulation Topology	Inductor Based
LED Configuration	Series-Parallel
I_LED per Channel (A) (max)	0.12
PWM Dimming Freq. (kHz) (max)	20
Dimming Ratio (max)	16666
Dimming Control	Analog PWM
V_DROPOUT (mV) (typ)	750
P_OUT (W)	15
I_CC (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

See parametric specs for LED Drivers

View Less

Simplified Block Diagram

Technical Docs

Data Sheet	4-Channel, Low-Voltage, 120mA LED Backlight Drivers with Integrated Boost Converter	Sep 21, 2021
App Note	Guideline on implementing temperature foldback with MAX25510, MAX25511, and MAX25512 using an NTColdback with MAX25510, MAX25511 and MAX25512 using an NTC
App Note	Using Hybrid Dimming with MAX25510 and MAX25511
Solution Guide	LED Driver for Automotive Display Applications

Design & Development

Click any title below to view the detail page where available.

Hardware Development

Evaluation Board

MAX25512EVKIT

Data Sheet

$80.69

Description/Applications

The MAX25512 evaluation kit (EV kit) demonstrates the MAX25512 integrated 4-channel high-brightness LED driver with I²C interface for automotive displays, and its stand-alone mode counterparts, namely the MAX25510 and MAX25511. The EV kit operates from a DC supply voltage between 3V and 36V, and the switching frequency can be either set at 2.2MHz or at 400kHz. The EV kit can be configured to operate in stand-alone mode or in I²C mode. Spread-spectrum mode (SSM) is enabled by default for electromagnetic interference (EMI) improvement, but it can be disabled either by acting on a register bit (MAX25512) or by properly choosing the resistor to be connected to the SET pin (MAX25510 and MAX25511).

The EV kit demonstrates phase-shifted pulse-widthmodulation (PWM) dimming. Dimming can be performed either externally using a PWM signal applied to the DIM PCB pad or internally by programming the desired dimming frequency and individual duty cycle through I²C (MAX25512 only). The hybrid dimming feature can be enabled through a register bit to reduce EMI (MAX25512 only). The EV kit features a LED current foldback option either as a function of the temperature, by means of a negative temperature coefficient (NTC) sensor (not provided), or through analog dimming. I²C-programmable (MAX25512) or resistor-programmable (MAX25510 and MAX25511) automatic fading functionality is also available.

Finally, the EV kit demonstrates short-LED, open-LED, LED short to ground, boost output short to ground/undervoltage and overvoltage, and overtemperature-fault protection. For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the IC data sheet.

The EV kit provides an I²C interface that can operate in conjunction with the MINIQUSB+* adapter board or a thirdparty I²C master. The EV kit also includes Windows^®- compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC (MAX25512 only).

Note: The MAX25512 EV kit schematic and bill of materials (BOM) show only the MAX25512 (MAX25512ATG/V+) as U2, but there are no other differences if the MAX25512 is replaced by the MAX25510 (MAX25510ATGA/V+) or MAX25511 (MAX25511ATGA/V+).

*Note: To be ordered separately.

View Details

Features

Demonstrates Robustness the MAX25510, MAX25511, and MAX25512
Wide 3V to 36V Input Operating Range (Up to 40V Load Dump)
Powers High-Brightness (HB) LEDs (Up to Four Strings) for Medium-to-Large-Sized LCD Displays in Automotive and Display Backlight Applications
400kHz to 2.2MHz Resistor-Programmable Switching Frequency with Spread-Spectrum Option
Phase-Shift Dimming Option
Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
Demonstrates Wide Dimming Ratio
Demonstrates Hybrid Dimming for Better EMI and Acoustic Performance and Higher Dimming Ratio
Demonstrates Fade In/Out for Smooth Brightness Transition
Designed to Show Thermal Foldback Function
I²C Programmability (MAX25512 only)
Dedicated GUI
Proven PCB and Thermal Design
Fully Assembled and Tested

Evaluation Board

MAX25512EVKIT

Data Sheet

$80.69

Description/Applications

*Note: To be ordered separately.

View Details

Features

Demonstrates Robustness the MAX25510, MAX25511, and MAX25512
Wide 3V to 36V Input Operating Range (Up to 40V Load Dump)
Powers High-Brightness (HB) LEDs (Up to Four Strings) for Medium-to-Large-Sized LCD Displays in Automotive and Display Backlight Applications
400kHz to 2.2MHz Resistor-Programmable Switching Frequency with Spread-Spectrum Option
Phase-Shift Dimming Option
Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
Demonstrates Wide Dimming Ratio
Demonstrates Hybrid Dimming for Better EMI and Acoustic Performance and Higher Dimming Ratio
Demonstrates Fade In/Out for Smooth Brightness Transition
Designed to Show Thermal Foldback Function
I²C Programmability (MAX25512 only)
Dedicated GUI
Proven PCB and Thermal Design
Fully Assembled and Tested

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

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Parameters

Parametric specs for LED Drivers

V_IN (V) (min)	3
V_IN (V) (max)	36
Max. No. of LEDs	40
# LED Channels	4
Regulation Topology	Inductor Based
LED Configuration	Series-Parallel
I_LED per Channel (A) (max)	0.12
PWM Dimming Freq. (kHz) (max)	20
Dimming Ratio (max)	16666
Dimming Control	Analog PWM
V_DROPOUT (mV) (typ)	750
P_OUT (W)	15
I_CC (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

See parametric specs for LED Drivers

Key Features

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

Applications/Uses

Automotive Central Information Displays
Automotive Head-Up Displays
Automotive Instrument Clusters

Description

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.

Simplified Block Diagram

Technical Docs

Data Sheet	4-Channel, Low-Voltage, 120mA LED Backlight Drivers with Integrated Boost Converter	Sep 21, 2021
App Note	Guideline on implementing temperature foldback with MAX25510, MAX25511, and MAX25512 using an NTColdback with MAX25510, MAX25511 and MAX25512 using an NTC
App Note	Using Hybrid Dimming with MAX25510 and MAX25511
Solution Guide	LED Driver for Automotive Display Applications

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

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INTERACTIVE Data Sheet

MAX25511

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

Product Details

Overview

Key Applications

Key Features

Applications/Uses

Simplified Block Diagram

Technical Docs

Design & Development

Support & Training

Overview

Parameters

Key Features

Applications/Uses

Description

Simplified Block Diagram

Technical Docs

Support & Training

INTERACTIVE Data Sheet

MAX25511

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

Product Details

Overview

Key Applications

Key Features

Applications/Uses

Simplified Block Diagram

Technical Docs

Design & Development

Support & Training

Overview

Parameters

Key Features

Applications/Uses

Description

Simplified Block Diagram

Technical Docs

Support & Training

MAX25511 Related Videos