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PDF BD49101AEFS-M Data sheet ( Hoja de datos )
| Número de pieza | BD49101AEFS-M | |
| Descripción | Multi-channel Power Supply IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Multi-Channel Power Supply LSI Series for Car Electronics
Multi-channel Power Supply IC
for Car Audio Systems
BD49101AEFS-M
General Description
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.
Features
AEC-Q100 Qualified(Note1)
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
(Note1:Grade3)
Key Specifications
Input Voltage Range:
5.5V to 25V(VIN0=BCAP)
DCDC1(controller):
DCDC2(with low power mode for MCU):
1A
REG1(output voltage variable):
500mA
REG2(output voltage variable):
100mA
REG3(output voltage variable):
300mA
REG4(output voltage variable for USB):
1.5A
REG5(output voltage variable):
50mA
High side SW:
500mA
Standby Current:
100µA(Typ)
REG4 Over Current Detect Accuracy:
±20%
Operating Temperature Range: -40°C to +85°C
DCDC Switching Frequency: 200kHz to 500kHz
Package
HTSSOP-A44
W(Typ) x D(Typ) x H(Max)
18.50mm x 9.50mm x 1.00mm
HTSSOP-A44
Applications
Car audio and infotainment
○Product structure:Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
1/41
TSZ02201-0V3V0AP00060-1-2
06.Apr.2015 Rev.001
1 page  
BD49101AEFS-M
・Relation of BCAP voltage and operating mode
When the voltage of the BCAP pin decreases under BCAP low voltage detection voltage (4.5V),
the registers are initialized and the ECO pin setting becomes invalid and forcibly changed to low power mode.
Afterwards, when BCAP voltage increases over BCAP low detection release voltage (4.7V)
without under POWER ON reset voltage (3.1V), the mode change to DCDC2 mode. (ECO pin setting is invalid.)
If BCAP voltage increases with under POWER ON reset voltage, the operation is same as VIN0 start up.
BCAP voltage
4.7V
4.5V
3.1V
BCLDET release
BCLDET detect
POWER_ON reset voltage
0V
μ-con 3.3V supply
voltage
OFF
DCDC2
STBREG
DCDC2
STBREG
OFF
Figure 4. Relation of BCAP voltage and operating mode
DCDC2
・Mode changing (Normal operation mode ⇔ low power mode)
When the ECO pin is changed from 0V to 3.3V, it changes from the low power mode to the normal operation mode.
When it changes from the low power mode to the normal operation mode, the output voltage drops according to the
load current. (Figure 5)
(ex.) ：Supply voltage 14.4V, output capacitor 100uF, load current 200mA : Output drop voltage=-80mV(Typ)
We recommend that you save consumption current of the microcomputer in 200mA within 1ms when the mode is
changed to normal operation mode (Figure 6).
3.3V
ECO
0V
3.3V
VOUT0
～80mV
（Output Capa=100uF,Load Current 200mA）
Figure 5. Timing Chart of mode changing (Normal operation mode ⇔ low power mode)
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/41
TSZ02201-0V3V0AP00060-1-2
06.Apr.2015 Rev.001
5 Page 
BD49101AEFS-M
Parameter
【STBREG】
Reference Voltage
Load Current Capacity
Line Regulation
Load Regulation
Ripple Rejection
I/O Voltage Difference
【REG1】
Reference Voltage
Load Current Capacity
Line Regulation
Load Regulation
Ripple Rejection
I/O Voltage Difference
【REG2】
Reference Voltage
Load Current Capacity
Line Regulation
Load Regulation
Ripple Rejection
I/O Voltage Difference
【REG3】
Reference Voltage
Load Current Capacity
Line Regulation
Load Regulation
Ripple Rejection
I/O Voltage Difference
Symbol
Spec Values
Min Typ Max
Unit
Conditions
VREF_STLD
IOSTLD
⊿VISTLD
⊿VLSTLD
RRSTLD
VSATSTLD
3.234
200
-
-
-
-
3.300
-
-
-
70
-
3.366
-
15
30
-
0.6
V
mA
mV VIN0=7 to 18V, Io=5mA
mV IO=5m to 200mA
dB Frp=100Hz, VIN0rp=1Vpp
V IO=100mA
VREF_LD1
IOLD1
⊿VILD1
⊿VLLD1
RRLD1
VSATLD1
0.588
500
-
-
-
-
0.600
-
-
-
70
-
0.612
-
10
20
-
1.0
V
mA VIN1=3.3V
mV VIN1=3 to 6V, Io=5mA
mV IO=5m to 500mA
dB Frp=100Hz, VIN1rp=1Vpp
V IO=250mA
VREF_LD2
IOLD2
⊿VILD2
⊿VLLD2
RRLD2
VSATLD2
0.777
100
-
-
-
-
0.793
-
-
-
70
-
0.809
-
25
50
-
0.65
V
mA
mV VIN2=9 to 18V, Io=5mA
mV IO=5mA to 100mA
dB Frp=100Hz, VIN2rp=1Vpp
V IO=50mA
VREF_LD3
IOLD3
⊿VILD3
⊿VLLD3
RRLD3
VSATLD3
0.784
300
-
-
-
-
0.800
-
-
-
70
-
0.816
-
20
40
-
0.6
V
mA VIN3=6V
mV VIN3=4.0 to 6.5V, Io=5mA
mV IO=5m to 300mA
dB Frp=100Hz, VIN3rp=1Vpp
V IO=150mA
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/41
TSZ02201-0V3V0AP00060-1-2
06.Apr.2015 Rev.001
11 Page | ||
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