BD81A44MUV-M
4ch White LED Driver with Buck-Boost (40 LED Maximum)

BD81A44MUV-M / BD81A44EFV-M (HTSSOP-B28 package) is a white LED driver with the capability of withstanding high input voltage (35V Max). This driver has 4ch constant-current drivers integrated in 1-chip, where each channel can draw up to 120mA (Max), which is also suitable for high illumination LED drive. Furthermore, a buck-boost current mode DC/DC controller is also integrated to achieve stable operation during power voltage fluctuation. Light modulation (10,000:1 @100Hz dimming function) is possible by PWM input.

Product Detail

 
Part Number | BD81A44MUV-ME2
Status | Recommended
Package | VQFN28SV5050
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes

Functional Safety:

Category : FS supportive
A product that has been developed for automotive use and is capable of supporting safety analysis with regard to the functional safety.

Specifications:

Common Standard

AEC-Q100 (Automotive Grade)

Topology

Buck-Boost

Number of Outputs

4

Vin(Min.)[V]

4.5

Vin(Max.)[V]

35.0

Output Current(Max.)[mA]

480.0

Vout(Max.)[V]

40.0

Frequency(Max.)[MHz]

2.2

Integrated FET

No

Dimming

PWM

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

125

Package Size [mm]

5x5 (t=1)

Features:

  • Integrated Buck-Boost current mode DC/DC controller
  • Integrated 4ch current driver for LED drive
  • 10,000:1 PWM dimming @100Hz
  • External switching frequency synchronization
  • Built-In protection function (UVLO, OVP, OCP, SCP)
  • LED abnormality detection function (Open/Short)
  • Integrated VOUT discharge function (Buck-Boost or Buck structure limitation)
  • AEC-Q100 Qualified (Grade 1)

Design Resources

 

Documents

White Paper

  • Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs
  • ROHM Automotive Lighting Solutions

Technical Articles

Schematic Design & Verification

  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • What Is Thermal Design
  • Basics of Thermal Resistance and Heat Dissipation
  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance

Tools

2D/3D/CAD

  • VQFN28SV5050 Footprint / Symbol

Packaging & Quality

Package Information

  • Package Information
  • Anti-Whisker formation

Manufacturing Data

  • Factory Information

Environmental Data

  • UL94 Flame Classifications of Mold Compound
  • Compliance with the ELV directive
  • REACH SVHC Non-use Declaration
  • RoHS Comission Delegated Directive

Export Information

  • The Export Control Order
  • Export Administration Regulations(EAR)