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Datasheet Microchip MIC38HC43

ManufacturerMicrochip
SeriesMIC38HC43

The MIC38HC4x family are fixed frequency current-mode PWM controllers with 1A drive current capability

Datasheets

  • Download » Datasheet, PDF, 83 Kb, Revision: 11-09-2015
    MIC38HC42/3/4/5 -BiCMOS 1A Current-Mode PWM Controllers
    Docket ↓
    MIC38HC42/3/4/5 Micrel, Inc. MIC38HC42/3/4/5
    BiCMOS 1A Current-Mode PWM Controllers General Description Features The MIC38HC4x family are fixed frequency current-mode
    PWM controllers with 1A drive current capability. Micrel’s
    BiCMOS devices are pin-compatible with 384x bipolar devices. Their high output drive, with fast rise and fall times,
    combined with low startup current make it an ideal PWM
    controller where high efficiency is required.
    Undervoltage lockout circuitry allows the ’42 and ’44 versions
    to start up at 14.5V and operate down to 9V, and the ’43 and
    ’45 versions start at 8.4V with operation down to 7.6V. All
    versions operate up to 20V.
    When compared to bipolar UC384x devices operating from a
    15V supply, start-up current has been reduced to 50µA
    typical and operating current has been reduced to 4.0 mA
    typical. Decreased output rise and fall times drive larger
    MOSFETs, and rail-to-rail output capability increases efficiency, especially at lower supply voltages. The MIC38HC4x
    also features a trimmed oscillator discharge current and
    bandgap reference.
    MIC38HC4x-1 is available in 14-pin plastic DIP and SOIC
    packages. 8-pin devices feature small size, while 14-pin
    devices separate the analog and power connections for
    improved performance and power dissipation. Fast 20ns output rise and 15ns output fall times –40°C to +85°C temperature range
    exceeds UC284x specifications High-performance, low-power BiCMOS Process Ultralow start-up current (50µA typical) Low operating current (4mA typical) High output drive (1A peak current, HC version) CMOS outputs with rail-to-rail swing Current-mode operation up to 500kHz Trimmed 5V bandgap reference Pin-for-pin compatible with UC3842/3843/3844/3845(A) Trimmed oscillator discharge current UVLO with hysteresis Low cross-conduction currents Applications Current-mode, off-line, switched-mode power supplies
    Current-mode, dc-to-dc converters. ...

Prices

Status

MIC38HC43-1YMMIC38HC43-1YM-TRMIC38HC43-1YNMIC38HC43YMMIC38HC43YM-TRMIC38HC43YN
Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)

Packaging

Parametrics

MIC38HC43-1YMMIC38HC43-1YM-TRMIC38HC43-1YNMIC38HC43YMMIC38HC43YM-TRMIC38HC43YN
Duty Cycle Max, %0.960.960.960.960.960.96
Input UVLO Typ, V8.48.48.48.48.48.4
Internal Voltage BiasTrueTrueTrueTrueTrueTrue
Maximum Input Voltage, V202020202020
Minimum Input Voltage, V7.67.67.67.67.67.6
Operating Frequency, HzAdj. to 500kHzAdj. to 500kHzAdj. to 500kHzAdj. to 500kHzAdj. to 500kHzAdj. to 500kHz
Operating Supply Current, mA444444
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85-40 to +85
Supported Outputs111111
Supported TopologiesForward,FlybackForward,FlybackForward,FlybackForward,FlybackForward,FlybackForward,Flyback
Typical Tolerance, %±2±2±2±2±2±2

Eco Plan

MIC38HC43-1YMMIC38HC43-1YM-TRMIC38HC43-1YNMIC38HC43YMMIC38HC43YM-TRMIC38HC43YN
RoHSCompliantCompliantCompliantCompliantCompliantCompliant

Other Options

MIC38HC42 MIC38HC44 MIC38HC45

Moldel Line

Series: MIC38HC43 (6)

Manufacturer's Classification

  • Power Management > PWM Controllers > Flyback/Fwd/Push-Pull Products

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