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BA3911

Rohm
Part Number BA3911
Manufacturer Rohm
Description Reference voltage power supply
Published Apr 1, 2005
Detailed Description Regulator ICs Reference voltage power supply BA3911 The BA3911 is a single-chip power supply IC for use in car audio sy...
Datasheet PDF File BA3911 PDF File

BA3911
BA3911

Overview
Regulator ICs Reference voltage power supply BA3911 The BA3911 is a single-chip power supply IC for use in car audio systems.
One 5.
6V output for microcontrollers, three 8.
7V outputs, and two outputs interlocked with BACKUP and ACC systems are built in.
FApplications Car audio systems FFeatures 1) A power supply IC for car audio systems ; one 5.
6V output for microcontrollers, three 8.
7V outputs, and two outputs interlocked with BACKUP and ACC systems are built in.
2) All output circuits use a PNP transistor with a low saturation voltage.
3) Output current limit circuit prevents damage to the IC in the event output is short-circuited.
FBlock diagram 4) Overvoltage protection circuit provides protection against surges from the ACC or BACKUP inputs.
5) Compact 12-pin POWER package allows a large power dissipation.
6) Thermal protection circuit prevents heat damage to the IC.
216 Regulator ICs FAbsolute maximum ratings (Ta = 25_C) BA3911 FRecommended operating conditions (Ta = 25_C) FPin descriptions 217 Regulator ICs FInput / output circuits BA3911 218 Regulator ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 13.
2V) BA3911 219 Regulator ICs BA3911 220 Regulator ICs FEstimate of allowable power dissipation Except under transitional conditions, the power dissipation of this IC is 3W per unit at 25_C.
See Fig.
4 for thermal derating characteristics, including some cases where heat sinks are used.
BA3911 Fig.
1 A = maximum voltage for VCC I1 = maximum output current for VDD I2 = maximum output current for COM I3 = maximum output current for AMP I4 = maximum output current for ANT I5 = maximum output current for AM I6 = maximum output current for FM S Power consumed by VDD 5.
6V S Power consumed by COM 8.
7V S Power consumed by AMP S Power consumed by ANT S Power consumed by AM 8.
7V S Power consumed by FM 8.
7V S Power consumed internally by each circuit P1 = (A * 5.
6V) I1 ) (I1 / 20 ) I1 / 10) I2 ) (I2 / 30 ) I2 / 10) P2 = (A * 8...


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