Evaluation Kit for the MAX25510/MAX25511/MAX25512
Evaluation Kit for the MAX25510/MAX25511/MAX25512
Features and Benefits
- 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
Product Detail
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.
Applications
- Automotive Central Information Displays
- Automotive Head-Up Displays
- Automotive Instrument Clusters
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