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Power Supply. BD9400BFP Datasheet

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Power Supply. BD9400BFP Datasheet






BD9400BFP Supply. Datasheet pdf. Equivalent




BD9400BFP Supply. Datasheet pdf. Equivalent





Part

BD9400BFP

Description

System Power Supply



Feature


TECHNICAL NOTE System Power Supply LSIs for use in automotive electronics Syste m Power Supply IC with Connunication Fu nction (Master Type) BD9400BFP Descript ion The BD9400BFP can be combined with the BD9401FM/BD9403FV to create applica tion-specific system power supplies. It can be controlled using an I2C BUS. Th e BD9400BFP is a main control chip feat uring an I2C BUS b.
Manufacture

Rohm

Datasheet
Download BD9400BFP Datasheet


Rohm BD9400BFP

BD9400BFP; idirectional communications function, a VDD LDO (for microcontroller use), a VD D reset, and BD9401FM/BD9403FV control circuits. The IC's I2C BUS communicatio ns function allows switching regulator and high-side switch on/off control, as well as switching regulator frequency adjustment, using a maximum of 3 channe ls. The I2C BUS read function can be us ed to send power s.


Rohm BD9400BFP

upply overvoltage and undervoltage detec tion signals, as well as switching regu lator output short detection signals. F eatures 1) The IC can be combined with the BD9401FM/BD9403FV to provide design flexibility. 2) On/off control of up t o 6 outputs with I2C BUS control 3) Bro ad input voltage range: 7 V to 36 V 4) Built-in LDO regulator for use with mic rocontrollers 5) L.


Rohm BD9400BFP

DO regulator: 3.3 V, 250 mA (±2% precis ion) 6) Built-in regulator voltage dete ction reset circuit 7) Built-in power s upply overvoltage and undervoltage dete ction circuits 8) Dual reference voltag e sources for BD9401FM/BD9403FV (VREF, VREG), and built-in triangular waveform oscillator 9) VREF reference voltage p recision: ±1% 10) The triangular wavef orm oscillator frequ.

Part

BD9400BFP

Description

System Power Supply



Feature


TECHNICAL NOTE System Power Supply LSIs for use in automotive electronics Syste m Power Supply IC with Connunication Fu nction (Master Type) BD9400BFP Descript ion The BD9400BFP can be combined with the BD9401FM/BD9403FV to create applica tion-specific system power supplies. It can be controlled using an I2C BUS. Th e BD9400BFP is a main control chip feat uring an I2C BUS b.
Manufacture

Rohm

Datasheet
Download BD9400BFP Datasheet




 BD9400BFP
TECHNICAL NOTE
System Power Supply LSIs for use in automotive electronics
System Power Supply IC
with Connunication Function
(Master Type)
BD9400BFP
Description
The BD9400BFP can be combined with the BD9401FM/BD9403FV to create application-specific system power supplies.
It can be controlled using an I2C BUS. The BD9400BFP is a main control chip featuring an I2C BUS bidirectional
communications function, a VDD LDO (for microcontroller use), a VDD reset, and BD9401FM/BD9403FV control circuits. The
IC's I2C BUS communications function allows switching regulator and high-side switch on/off control, as well as switching
regulator frequency adjustment, using a maximum of 3 channels. The I2C BUS read function can be used to send power
supply overvoltage and undervoltage detection signals, as well as switching regulator output short detection signals.
Features
1) The IC can be combined with the BD9401FM/BD9403FV to provide design flexibility.
2) On/off control of up to 6 outputs with I2C BUS control
3) Broad input voltage range: 7 V to 36 V
4) Built-in LDO regulator for use with microcontrollers
5) LDO regulator: 3.3 V, 250 mA (±2% precision)
6) Built-in regulator voltage detection reset circuit
7) Built-in power supply overvoltage and undervoltage detection circuits
8) Dual reference voltage sources for BD9401FM/BD9403FV (VREF, VREG), and built-in triangular waveform oscillator
9) VREF reference voltage precision: ±1%
10) The triangular waveform oscillator frequency can be changed to ±10% or ±20% using I2C BUS control.
11) Flag output for undervoltage detection, overvoltage detection, and BD9401FM/BD9403FV short protection detection
signals
12) Total system stand-by current of 60 µA (Typ.) when VDDLDO, reset, overvoltage, and undervoltage detection circuits
are set.
13) Package: HSOP25
Applications
Car audio, satellite navigation systems, etc.
Ver.B Oct.2005




 BD9400BFP
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limit
Unit
Power supply voltage
Vcc
36*1
V
Applied voltage
SDA, SCL, STBY
7
V
Power dissipation 1
P01
0.85*2
W
Power dissipation 2
P02
1.45*3
W
Operating temperature range
TOPR
-40 to +85
°C
Storage temperature range
TSTG
+150
°C
Maximum junction temperature
TJMAX
+150
°C
*1 Not to exceed Pd.
*2 Reduced by 6.8 mW/°C over Ta 25°C during IC without heat sink operation.
*3 Reduced by 11.6 mW/°C over Ta 25°C, when mounted on a glass epoxy board (70.0 mm × 70.0 mm × 1.6 mm).
Recommended operating ranges (Ta = 25°C) (Not to exceed Pd.)
Parameter
Power supply voltage
Oscillating frequency (PWM controller)
Symbol
Vcc
fosc
Min.
8
30
Max.
26
500
Unit
V
KHz
Electrical characteristics (Unless otherwise specified, Ta = 25°C; Va = 13.5 V; STDY = 3.3 V)
Parameter
[Oscillator block]
Oscillating frequency
Frequency Va fluctuation
Frequency rate of change 1
Frequency rate of change 2
Frequency rate of change 3
Frequency rate of change 4
[Reference voltage]
Output voltage
Line regulation
Load regulation
Short current
[VREG voltage]
Output voltage
Output current capacity
[Standby control]
On mode voltage
Off mode voltage
[Overall]
Total supply current
Total supply current during standby operation
Symbol
FOSC
IROSC
FOSC1
FOSC2
FOSC3
FOSC4
VREF
REF1
REF0
IOVREF
VREG
IREG
VSTAH
VSTAL
IOC
ISTBY
Min.
162
2.97
4.5
10
2.3
0
Limit
Typ.
180
+10
-10
+20
-20
3.00
1
5
30
5.0
1.0
60
Unit
Max.
Conditions
198 KHz CT = 1000PF, RT = 52 k
2 % Vcc = 8 V to 25V
— % Compliant with I2C BUS specifications.
— % Compliant with I2C BUS specifications.
— % Compliant with I2C BUS specifications.
— % Compliant with I2C BUS specifications.
3.03 V Io = 1 mA
10 mV Vcc = 8 V to 26 V
20 mV Io = 1 mA
— mA
5.5 V Io = 0 mA
— mA
3.3 V
1.0 V
2.0 mA VST = 3.3 V
100 µA VSTB = 0 V
2/16




 BD9400BFP
Electrical characteristics
Parameter
[Output voltage 3.3 V, 250 mA]
Output voltage
Output peak current
Line regulation
Load regulation
Ripple rejection
[RESET]
Detection voltage
Hysteresis voltage
Delay time
[Overvoltage detection]
Detection voltage
Hysteresis voltage
[Reduced-voltage detection]
Detection voltage
Hysteresis voltage
[STATUS_FLAG]
Output current capacity
Symbol
Vo
IPEAK
VOL
VOR
RR
VDR
DR
TDR
VDO
DO
VDU
DU
ISTF
Min.
3.234
0.25
50
2.66
5
17.5
8.0
1
Limit
Typ.
3.3
10
30
60
2.80
90
10
18.5
400
8.5
150
Max.
3.366
2
20
60
2.94
20
19.5
9.0
Unit Conditions
V Io = 10 mA
A
mV Vcc = 9 V to 26 V, Io = 10 mA
mV Io = 10 mA to 200 mA
dB F = 100 Hz, 0.5 VP-P, Io = 10 mA
V
mV
ms CDELAY = 0.01 UF
V Io = 0 mA
mV
V
mV
mA VSTASTUS_FLAG = 0.4 V
I2C BUS specifications
(1) BUS line and I/O timing and electrical characteristics
SDA
SCL
tBUF
tLOW
tR
tHD;STA
tHD;DAT
PS
tF
tHIGH
tSU;DAT tSU;STA Sr
Fig.1 I2C BUS Timing Definitions
tHD;STA
tSP
tSU;STO
MBC611
P
3/16






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