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Boost and Inverted Output Power Supply for TFT-LCD Displays - BD83850GWL

BD83850GWL is a boost switching regulator and charge pump inverter for small TFT-LCD Displays. It has a wide input voltage range of 2.5V to 4.5V that is suitable for portable applications. In addition, its small package design is ideal for miniaturizing the power supply.

* 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
BD83850GWL-E2 Active UCSP50L1C 3000 3000 Taping Yes
 
Specifications:
Grade Standard
ch 2
Integrated FET / Controller Integrated FET
Buck / Boost / Buck-Boost / Inverting Boost / Inverting
Synchronous / Nonsynchronous Nonsynchronous
Vin1(Min.)[V] 2.5
Vin1(Max.)[V] 4.5
Vout1(Min.)[V] 4.9
Vout1(Max.)[V] 5.1
Iout1(Max.)[A] 0.05
SW frequency(Max.)[MHz] 1.0
EN No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
Features:
    • Wide input voltage range of 2.5V to 4.5V
    • High frequency operation
    • Output Discharge Independent ON/OFF signal(STBYP, STBYN)
    • Circuit protection
 
 
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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

This Application Note offers reference table to easily set resistor values for output voltage with various internal reference voltages VREF.

PCB Layout Techniques of Buck Converter

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Snubber Circuit for Buck Converter IC

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Capacitor Calculation for Buck converter IC

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Inductor Calculation for Buck converter IC

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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.