Multi-channel Power Supply IC for Car Audio Systems - BD49101AEFS-M

The BD49101AEFS-M LSI is a multi-channel power supply IC that can provide all necessary supply voltages for automobile audio systems. The IC has two Switching Power Supplies (DCDC), five Regulators (REG) and a High Side switch. This single power supply system can provide the required voltages to all systems including the MCU, CD, tuner, USB, illumination, audio circuits and others. The IC system is based on switching regulator which has high efficiency then you can suppress heat of IC than before. And it has low power mode operation or voltage control function so that you can get (1) High Efficiency (2) Low IQ and (3) easiness of power supply design.

Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BD49101AEFS-ME2 Active HTSSOP-A44 1500 1500 Taping Yes
Grade Automotive
ch 7
Vin1(Min.)[V] 5.5
Vin1(Max.)[V] 25.0
SW frequency(Max.)[MHz] 0.5
Circuit Current(Typ.)[mA] 5.0
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
    • AEC-Q100 Qualified
    • Integrated 7 channels of Power Supply for Car Audio
      ・2 DCDC (Integrated 1 Controller)
      ・5 REG
    • 1 High Side Switch channel
    • Integrated Low Power Standby REG for MCU Power Supply
    • REG4 Cable Impedance Compensation
    • I²C Interface
    • Selectable Oscillation Frequency using External Resistance
    • External Clock Synchronization
    • Power Supply Control Function (Power on/off Sequencer).
    • Low Voltage, Over Voltage and REG4 Over Current Detect Flag
    • Integrated Protection Circuitry:
      ・Over Voltage Input Protection
      ・Over Current Protection
      ・Thermal Shutdown
Other New/Updated Products Relating to Power Management
PART NUMBER Product Name Package Datasheet Distribution Inventory
BD49101ARFS-M Multi-channel Power Supply IC for Car Audio Systems HTSSOP-A44R   Buy Sample
New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.