UC2856-Q1 Automotive 8V to 40V, Up to 1MHz Current Mode PWM Controller | TI.com

UC2856-Q1 (ACTIVE)

Automotive 8V to 40V, Up to 1MHz Current Mode PWM Controller

Automotive 8V to 40V, Up to 1MHz Current Mode PWM Controller - UC2856-Q1
Datasheet
 

Description

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.

Features

  • 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)

Parametrics

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Part number Order Topology Control method VCC (Min) (V) VCC (Max) (V) Frequency (Max) (kHz) UVLO thresholds on/off (V) Duty cycle (Max) (%) Gate drive (Typ) (A) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
UC2856-Q1 Order now Boost
Flyback
Forward
Full-Bridge
Half-Bridge
Push-Pull    
Current     7.7     40     1000     7.7/7     50     1.5     Error Amplifier
Multi-topology
Soft Start
Synchronization Pin    
Automotive     -40 to 125     SOIC | 16     16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)    
LM25037-Q1 Order now Full-Bridge
Half-Bridge
Push-Pull    
Current
Feedforward
Voltage    
8     14     2000     Programmable/1.25V     96     1.2     Adjustable Switching Frequency
Current Limiting
HV Start-up
Multi-topology
Programmable Max Duty Cycle
Programmable Soft Start
Synchronization Pin    
Automotive     -40 to 125     TSSOP | 16     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
UCC2808A-1Q1 Order now Push-Pull     Current     13     14     1000     12.5/8.3     50     1     Soft Start     Automotive     -40 to 125     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC2808A-2Q1 Order now Push-Pull     Current     5     14     1000     4.3/4.1     50     1     Soft Start     Automotive     -40 to 125     SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)