파트넘버.co.kr BD4911FM 데이터시트 PDF


BD4911FM 반도체 회로 부품 판매점

Multifunction System Power Supply IC



ROHM Semiconductor 로고
ROHM Semiconductor
BD4911FM 데이터시트, 핀배열, 회로
TECHNICAL NOTE
System Power Supply LSIs for use in automotive Electronics
Multifunction System
ESD
Resistance
Power Supply IC
Now available
(with Watchdog Timer)
BD4911FM
zDescription
The BD4911FM multiple-output system power supply features microcontroller output and is capable of operating at super-low
dark current levels. With a built-in reset, with a microcontroller delay, BATTERY/ACCESSORY voltage detection, and mute
function, WDT (Watch Dog Timer)function, the BD4911FM is ideal for car audio and satellite navigation systems.
zFeatures
1) Main regulator Vo1 can be switched between 5.0 V and 3.3 V output using the SEL input voltage, and can be used
with an external boost transistor.
Sub-regulator Vo2 generates 3.3 V output.
Both regulators feature an output current of 150 mA.
2) Built-in WDT reset; monitor time can be set with the CTW capacitor.
WDT operation can be switched on and off using INH input.
3) Circuit current during standby operation (WDT off): 100 µA (TYP)
4) Built-in reduced power detection circuits for Vo1 and Vo2 output
5) Built-in elevated output detection circuit for Vo1
6) The IC monitors the BuM voltage and outputs it to the BuDET1 and BuDET2 pins.
7) The IC monitors the ACCM voltage and outputs it to the ACCM pin when BuDET1 and BuDET2 are low.
8) Built-in mute circuit. Pulse width can be set with the CE capacitor.
9) Built-in power-on reset function for which RESET output can be set with the CTP capacitor.
10) Vo1 generates low-saturation voltage type PMOS output.
11) Built-in overcurrent protection circuit
12) Built-in overvoltage protection circuit
13) Built-in thermal shutdown circuit
14) The 28-pin HSOP-M28 package is ideal for space-saving designs.
zApplications
Car audio and satellite navigation systems
Ver.B Oct.2005


BD4911FM 데이터시트, 핀배열, 회로
zAbsolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Limits
Supply Voltage 1
VIN1
-0.3 to 36
Supply Voltage 2
VIN2
-0.3 to 36
Power Dissipation
Pd 2200 (*1)
Operating Temperature Range
Topr
-40 to +85
Storage Temperature Range
Tstg
-55 to +150
Peak Supply Voltage 1
VIN1 Peak
50 (*2)
Peak Supply Voltage 2
VIN2 Peak
50 (*2)
Surge Applied Current 1
IACC (S+)
+3 (*2)
Surge Applied Current 2
IACC (S-)
-12 (*3)
Maximum Junction Temperature
Tjmax
150
*1: When mounted on a PCB (70 mm × 70 mm × 1.6 mm glass epoxy).
*2: tr 1 ms, Bias voltage/current is less than 200 ms or shorter
*3: tr 1 ms, Bias voltage/current 60 ms or shorter
Unit
V
V
mW
°C
°C
V
V
mA
mA
°C
zRecommended operating ranges (Ta = 25°C)
Parameter
Symbol
Min.
Limits
Typ.
Max.
Unit
Comment
Recommended Power
Supply Voltage Range 1
VIN1
VIN1
Vo1+1.2
Vo1 + 0.5 +
eternal TrVBE
13.2
13.2
16.0 V When using built-in transistor.
16.0
V
When using external boost
transistor.
Recommended Power
Supply Voltage Range 2
VIN2
4.5
13.2 16.0 V
Recommended Power
Supply Voltage Range 3
Vo1
1.2
5.2 V RESET, DET1
Recommended Power
Supply Voltage Range 4
Vo1
2.5
5.2
V
BuDET, ACCDET, MUTE,
WDT
Recommended Power
Supply Voltage Range 5
Vo2
1.2
3.4 V DET2
*Electrical characteristics are not guaranteed (especially when operating on reduced voltage).
zExternal element setting time (Ta = 25°C)
Parameter
Symbol
Runaway Operation Detection
Time 1
TWD1
Runaway Operation Detection
Time 2
TWD2
Runaway Operation Reset Time 1 TWR1
Runaway Operation Reset Time 2 TWR2
Power-on Reset Time
TPR
CD Delay Time
Td
MUTE Pulse Width
Tm
BuM Detection Voltage (rising) VTHBu
BuM Detection Voltage (falling) VTLBu
ACCM Detection Voltage (rising) VTHACC
ACCM Detection Voltage (falling) ATLACC
EquationTYP
700 × CTW (µF)
462 × CTW (µF)
340 × CTW (µF)
260 × CTW (µF)
1000 × CTP (µF)
100 × CD (µF)
1 × CE (µF)
1.252 × (R1+R2)/R2
1.184 × (R1+R2)/R2
1.252 ×
(R3 + R4)/R4
1.184 × (R3+R4)/R4
Unit
mS
mS
mS
mS
mS
mS
S
V
V
V
V
Recommendation
0.1 to 2.2
0.1 to 2.2
0.1 to 2.2
0.1 to 2.2
0.047 to 0.22
0.047 to 0.22
0.1 to 2.2
R1: 0.5 to 2
R2: 0.1 to 0.5
R3: 50 to 200
R4: 10 to 50
Unit Condition
µF SEL > 1.5 V
µF SEL < 1.0 V
µF SEL > 1.5 V
µF SEL < 1.0 V
µF
µF
µF
M
k
2/16




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BD4911FM

Multifunction System Power Supply IC - ROHM Semiconductor