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UC2856-Q1

NICHT FÜR NEUE DESIGNS EMPFOHLEN

PWM-Controller mit bis zu 1-MHz-Strommodus für die Automobilindustrie, 8 V bis 40 V

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Datenblatt
UC2856-Q1 wird nicht für neue Designs empfohlen
Dieses Produkt ist weiterhin für Bestandskunden erhältlich. Für neue Designs sollte ein alternatives Produkt in Erwägung gezogen werden.
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Ähnliche Funktionalität wie der verglichene Baustein.
UCC2808A-2 AKTIV Push-Pull-PWM im energieeffizienten Strommodus mit Entladungstransistor, 4,3/4,1V UVLO, –40 bis 85 G Upgraded to BiCMOS

UC2856-Q1

NICHT FÜR NEUE DESIGNS EMPFOHLEN
Datenblatt Jetzt bestellen

Produktdetails

Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
SOIC (DW) 16 106.09 mm² (10.3 mm × 10.3 mm)
  • Qualified for Automotive Applications
  • Pin-for-Pin Compatible With the UC2846
  • 65-ns Typical Delay From Shutdown to Outputs and
    50-ns Typical Delay From Sync to Outputs
  • Improved Current Sense Amplifier With Reduced Noise Sensitivity
  • Differential Current Sense With 3-V Common-Mode Range
  • Trimmed Oscillator Discharge Current for Accurate Deadband Control
  • Accurate 1-V Shutdown Threshold
  • High Current Dual Totem Pole Outputs (1.5-A Peak)
  • TTL Compatible Oscillator SYNC Pin Thresholds
  • ESD Protection
    • 4-kV Human-Body Model (HBM)
    • 500-V Charged-Device Model (CDM)
  • Qualified for Automotive Applications
  • Pin-for-Pin Compatible With the UC2846
  • 65-ns Typical Delay From Shutdown to Outputs and
    50-ns Typical Delay From Sync to Outputs
  • Improved Current Sense Amplifier With Reduced Noise Sensitivity
  • Differential Current Sense With 3-V Common-Mode Range
  • Trimmed Oscillator Discharge Current for Accurate Deadband Control
  • Accurate 1-V Shutdown Threshold
  • High Current Dual Totem Pole Outputs (1.5-A Peak)
  • TTL Compatible Oscillator SYNC Pin Thresholds
  • ESD Protection
    • 4-kV Human-Body Model (HBM)
    • 500-V Charged-Device Model (CDM)

The UC2856 is a high performance version of the popular UC2846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5-A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a 3-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal noise caused when driving large capacitive loads. This, in conjunction with the improved differential current-sense amplifier, results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead-time control, a 1-V 5% shutdown threshold, and 4-kV minimum ESD protection (HBM) on all pins.

The UC2856 is a high performance version of the popular UC2846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5-A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a 3-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal noise caused when driving large capacitive loads. This, in conjunction with the improved differential current-sense amplifier, results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead-time control, a 1-V 5% shutdown threshold, and 4-kV minimum ESD protection (HBM) on all pins.
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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt Improved Current-Mode PWM Controller datasheet (Rev. B) 26.05.2011

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