UCC2808A-2Q1 Automotive 4.1V to 15V, 1A Push-Pull Current Mode PWM Controller | TI.com

UCC2808A-2Q1 (ACTIVE)

Automotive 4.1V to 15V, 1A Push-Pull Current Mode PWM Controller

Automotive 4.1V to 15V, 1A Push-Pull Current Mode PWM Controller - UCC2808A-2Q1
Datasheet
 

Description

The UCC2808A-xQ1 is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A-xQ1 contains all of the control and drive circuitry required for off-line or DC-to-DC fixed frequency current-mode switching power supplies with minimal external parts count.

The UCC2808A-xQ1 dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than 50%.

The UCC2808A-xQ1 family offers a variety of package options and choice of undervoltage lockout levels. The family has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown in the ordering information table.

The UCC2808A-xQ1 is an enhanced version of the UCC2808 family. The significant difference is that the A versions feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

Features

  • Qualified for Automotive Applications
  • ESD Protection Exceeds 1500 V Per MIL-STD-883, Method 3015; Exceeds 200 V
    Using Machine Model (C = 200 pF, R = 0)
  • Dual Output Drive Stages in Push-Pull Configuration
  • Current Sense Discharge Transistor to Improve Dynamic Response
  • 130-µA Typical Starting Current
  • 1-mA Typical Run Current
  • Operation to 1 MHz
  • Internal Soft Start
  • On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product
  • On Chip VDD Clamping
  • Output Drive Stages Capable of 500-mA Peak-Source Current,
    1-A Peak-Sink Current

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)
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)    
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)    
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)    
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)    
UCC28220-Q1 Order now Flyback
Forward    
Current     8.4     14.5     2000     10.5/8.4     90     0.01     Adjustable Switching Frequency
Current Limiting
Input Line Monitor
Multi-topology
Programmable Max Duty Cycle
Programmable Slope Compensation
Soft Start    
Automotive     -40 to 125     SOIC | 16
TSSOP | 16    
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)