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3.6-35V 2ch Buck converter (Controller) - BD9848FV

BD9848FV is an IC containing two circuits of switching regulator controller by pulse width modulation system. Both of two circuits can be used for step-down DC/DC converter operation. In addition, the package is designed compact, and is optimum for compact power supply for many kinds of equipment.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD9848FV-E2 Active SSOP-B20 2500 2500 Taping Yes
 
Specifications:
Grade Standard
ch 2
Integrated FET / Controller Controller
Buck / Boost / Buck-Boost / Inverting Buck
Synchronous / Nonsynchronous Nonsynchronous
Vin1(Min.)[V] 3.6
Vin1(Max.)[V] 35.0
Vout1(Min.)[V] 1.2
Vout1(Max.)[V] 31.5
Iout1(Max.)[A] 1.0
Vin2(Min.)[V] 3.6
Vin2(Max.)[V] 35.0
Vout2(Min.)[V] 1.2
Vout2(Max.)[V] 31.5
SW frequency(Max.)[MHz] 1.5
Light Load mode No
EN Yes
PGOOD No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
Features:
  • ・High voltage resistance input (Vcc=35V)
    ・FET driver circuit is contained (step-down circuit 2 output).
    ・Error amplifier reference voltage (1.0V±1%) and REG output circuit (2.5V) are contained.
    ・Over current detection circuit is contained. (Continuous detection of 5 cycles)
    ・Soft start and pause period can be adjusted.
    ・Three modes of standby, master, and slave can be switched. (Iccs = 0μA typ in standby mode.)
    ・ON / OFF control is enabled independently for each channel. (DT terminal)
 
 
Applications:
Pin Configuration:
Pin Configration
 
 
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Technical Data
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The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.

Calculation of Power Loss (Synchronous)

This application note describes how to obtain the power loss required to calculate the temperature of a semiconductor device. Temperature control is important to ensuring product reliability.

Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)

This application note introduces a method for easily measuring the phase margin with a Frequency Response Analyzer (FRA) made by NF Corporation.

Resistor Value Table to set Output Voltage of Buck Converter IC

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PCB Layout Techniques of Buck Converter

Major problems that arise from in appropriate layout may cause increase in noise superposed by output and switching signal, the deterioration of regulator, and also lack of stability...

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Capacitor Calculation for Buck converter IC

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Inductor Calculation for Buck converter IC

This application note covers the steps required in choosing the inductor and to calculate the value used in buck regulator IC circuits.

Efficiency of Buck Converter

This application note explains power loss factors and methods for calculating them. It also explains how the relative importance of power loss factors depends on the specifications of the switching power source.

The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit

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Considerations for Power Inductors Used for Buck Converters

This application note explains the features and things to consider when shopping for power inductors.