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UC3845BN vs LT1244CS8#PBF vs UC3844NG Comparison

  • Hide Shared Attributes
    UC3845BN
    UC3845BN
    LT1244CS8#PBF
    LT1244CS8#PBF
    UC3844NG
    UC3844NG
  • Part No.
    UC3845BN
    LT1244CS8#PBF
    UC3844NG
  • Description
    PMIC; PWM controller; 1A; 48-500kHz; DIP8; boost, flyback; 1.25W
    LINEAR TECHNOLOGY LT1244CS8#PBF PWM Controller, 25V-12V supply, 500kHz, 5V/200mA out, SOIC-8
    Current Mode PWM Controller 1A 500kHz 8Pin PDIP Rail
  • Manufacturer
    St microelectronics
    Linear technology
    On semiconductor
  • Classification
    PWM Controllers
    Power Management
    DC-DC Converters
  • Reference Price(USD)
    $0.135
    $2.821
    -
  • Inventory(pcs)
    15.6k
    475
    7.8k
  • Case/Package
    DIP-8
    SOIC-8
    DIP-8
  • Number of Pins
    8
    8
    8
  • Frequency
    250 kHz
    500 kHz
    -
  • Power Dissipation
    1.25 W
    1 W
    -
  • Number of Positions
    8
    8
    -
  • Rise Time
    50 ns
    50 ns
    -
  • Thermal Resistance
    100 ℃/W
    -
    -
  • Output Voltage
    5 V
    5 V
    4.9V ~ 5.1V
  • Input Voltage (DC)
    15.0 V
    15.0 V
    30.0 V
  • Duty Cycle
    50 %
    48 %
    -
  • ECCN Code
    EAR99
    EAR99
    -
  • Switching Frequency
    250 kHz
    500kHz (MAX)
    500kHz (MAX)
  • Supply Voltage (DC)
    12.0V (min)
    12.0V (min)
    -
  • Supply Current
    17 mA
    -
    -
  • Output Current
    200 mA
    200 mA
    -
  • Quiescent Current
    -
    170 µA
    -
  • Number of Outputs
    1
    1
    1
  • Operating Temperature
    -40℃ ~ 150℃ (TJ)
    0℃ ~ 100℃
    0℃ ~ 70℃ (TA)
  • Size-Length
    10.92 mm
    -
    -
  • Size-Width
    6.6 mm
    -
    -
  • Size-Height
    3.32 mm
    1.5 mm
    -
  • Mounting Style
    Through Hole
    Surface Mount
    Through Hole
  • Packaging
    Tube
    Each
    Tube
  • REACH SVHC Compliance
    No SVHC
    No SVHC
    -
  • Lead-Free Status
    Lead Free
    Lead Free
    Lead Free
  • RoHS
    RoHS Compliant
    RoHS Compliant
    RoHS Compliant
  • Product Lifecycle Status
    Active
    Unknown
    Unknown
  • Fall Time
    50 ns
    30 ns
    -
  • Input Voltage
    15 V
    15 V
    -
  • Operating Temperature (Min)
    -40 ℃
    0 ℃
    0 ℃
  • Operating Temperature (Max)
    150 ℃
    100 ℃
    70 ℃
  • Industrial-Spec
    -
    Yes
    -
  • Power Dissipation (Max)
    1250 mW
    1000 mW
    -
  • Output Voltage (Max)
    5.1 V
    -
    -
  • REACH SVHC Compliance Edition
    2015/12/17
    2015/12/17
    -
  • Output Voltage (Min)
    4.90 V
    -
    -
  • Supply Voltage
    8.2V ~ 25V
    11V ~ 25V
    -
  • Output Current (Max)
    1 A
    1 A
    -
  • Supply Voltage (Max)
    25 V
    25 V
    -
  • Maximum Duty Cycle
    50 %
    48 %
    48 %
  • Supply Voltage (Min)
    12 V
    12 V
    -
  • Overview
    UC3845BN Product overview

    The UC3845BN is a high performance current mode PWM Controller IC. It is provides the necessary features to implement off-line or DC-to-DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise duty cycle control under-voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs is low in the off-state.

    .
    Trimmed oscillator for precise frequency control
    .
    Automatic feed forward compensation
    .
    Latching PWM for cycle-by-cycle current limiting
    .
    Internally trimmed reference with under-voltage lockout
    .
    High current totem pole output
    .
    Under-voltage lockout with hysteresis
    .
    Low start-up and operating current
    View all
    LT1244CS8#PBF Product overview

    The LT1244CS8#PBF is a high speed current-mode Pulse Width Modulator, an improved plug compatible versions of the industry standard UC1842 series. It has both improved speed and lower quiescent current. The LT1241 series is optimized for off-line and DC/DC converter applications. It contains a temperature-compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output stage ideally suited to driving power MOSFETs. Start-up current has been reduced to less than 250µA. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. Trims have been added to the oscillator circuit for both frequency and sink current and both of these parameters are tightly specified. The output stage is clamped to a maximum VOUT of 18V in the on-state.

    .
    <250µA Low start-up current
    .
    50ns Current sense delay
    .
    Undervoltage lockout with hysteresis
    .
    No cross-conduction current
    .
    Trimmed bandgap reference
    .
    1A Totem pole output
    .
    Trimmed oscillator frequency and sink current
    .
    Active pull-down on reference and output during undervoltage lockout
    .
    18V High level output clamp
    .
    Current sense leading edge blanking
    View all
    UC3844NG Product overview

    Boost, Flyback Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-PDIP

    View all

UC3845BN Alternative Parts

Image Part Compare Manufacturer Category Description
Image:UC3845BN Mfr.Part#:UC3845BN Compare: Current Part Manufacturers:St microelectronics Category:PWM Controllers Description:Pmic; pwm controller; 1a; 48-500khz; dip8; boost, flyback; 1.25w
Image:UC3845BN Mfr.Part#:UC3845BN Compare: UC3845BN VS UC3845BN Manufacturers:St microelectronics Category:PWM Controllers Description:Pmic; pwm controller; 1a; 48-500khz; dip8; boost, flyback; 1.25w
Image:UC2843BD1 Mfr.Part#:UC2843BD1 Compare: UC3845BN VS UC2843BD1 Manufacturers:St microelectronics Category:Power Management Description:Stmicroelectronics uc2843bd1 current mode pwm, 30v supply, 500khz, 5v/1a out, soic-8
Image:LT1244CS8#PBF Mfr.Part#:LT1244CS8#PBF Compare: UC3845BN VS LT1244CS8#PBF Manufacturers:Linear technology Category:Power Management Description:Linear technology lt1244cs8#pbf pwm controller, 25v-12v supply, 500khz, 5v/200ma out, soic-8