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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 120MA
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：4
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：35V
- Voltage - Output：-
- Current - Output / Channel：120mA
- Frequency：200kHz ~ 2.2MHz
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The BD81A04EFV-ME2 is a four-channel LED lighting driver IC from ROHM Semiconductor, designed for automotive applications. It features an integrated buck-boost DC/DC controller and supports PWM dimming with a ratio of up to 10,000:1 at 100Hz. The device operates within an input voltage range of 4.5V to 35V and delivers a maximum output current of 120mA per channel, totaling 480mA. It functions at switching frequencies between 200kHz and 2.2MHz. Qualified under AEC-Q100 Grade 1 standards, it withstands temperatures from -40°C to +125°C and is housed in a 28-pin HTSSOP-B package.
Feature Summary
- Integrates a buck-boost current mode DC/DC controller for stable operation across varying supply voltages.
- Provides four independent constant current channels optimized for high-brightness white LED driving.
- Supports wide-range PWM dimming control with a contrast ratio of 10,000:1 at 100Hz.
- Includes built-in protection mechanisms such as UVLO, OVP, OCP, SCP, and LED abnormality detection.
Applications
- Automotive LCD backlight systems
- High-brightness LED illumination circuits
- Vehicle interior lighting modules
Procurement Notes
Verify the specific suffix ME2 against the official datasheet to confirm pinout and thermal pad configuration. Confirm AEC-Q100 Grade 1 qualification status for your target automotive environment. Check for the NRND (Not Recommended for New Designs) status on distributor platforms, as this may impact long-term availability and support. Ensure the HTSSOP-B-28 package dimensions match your PCB footprint requirements before finalizing procurement.
Selection Notes
Select this component when designing automotive displays requiring four independent LED channels driven by a single controller. It is suitable for systems where input voltage fluctuates significantly, necessitating a buck-boost topology rather than simple boost or buck converters. Consider this part if a 10,000:1 dimming ratio is sufficient for the application's visual requirements. Verify that the 120mA per channel limit meets the brightness specifications of the selected LEDs.
Part Context
This IC belongs to the BD81A series of automotive-grade LED drivers from ROHM Semiconductor. The series is engineered to address the increasing size and complexity of vehicle display systems. These drivers integrate power switches and control logic to reduce external component count. The BD81A04 variant specifically targets applications needing four channels, balancing performance with thermal efficiency in compact packages.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Consult ROHM Semiconductor directly for cross-reference recommendations or updated design-in alternatives due to the NRND status.
