BD49101AEFS-M PDF – Multi-channel Power Supply IC

Part Number: BD49101AEFS-M

Function: Multi-channel Power Supply IC for Car Audio Systems

Package: HTSSOP-A44 Type

Manufacturer: Rohm

BD49101AEFS-M pdf datasheet


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 ①High Efficiency ②Low IQ and ③easiness of power supply design.


1. Integrated 7 channels of Power Supply for Car Audio
・2 DCDC (Integrated 1 Controller )
・5 REG

2. 1 High Side Switch channel

3. Integrated Low Power Standby REG for MCU Power Supply

4. REG4 Cable Impedance Compensation

5. I2C Interface

6. Selectable Oscillator Frequency using External Resistance

7. External Clock Synchronization

8. Power Supply Control Function (Power on/off Sequencer).

9. Low Voltage, Over Voltage and REG4 Over Current Detect Flag

BD49101AEFS-M pinout

Key Specifications

1. Input Voltage Range: 5.5V to 25V(VIN0=BCAP)

2. DCDC1(controller):

3. DCDC2(with low power mode for MCU): 1A

4. REG1(output voltage variable): 500mA

5. REG2(output voltage variable): 100mA

6. REG3(output voltage variable): 300mA

7. REG4(output voltage variable for USB): 1.5A

8. REG5(output voltage variable): 50mA

9. High side SW: 500mA


1. Car Audio and Infotainment

BD49101AEFS-M PDF Datasheet