UCC3808-2

ACTIVE

Low power current mode push-pull PWM with 4.3/4.1V UVLO, 0°C to 70°C

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Product details

Parameters

Topology Push-Pull Control method Current VCC (Min) (V) 5 VCC (Max) (V) 14 Duty cycle (Max) (%) 49 UVLO thresholds on/off (V) 4.3/4.1 Frequency (Max) (kHz) 1000 Operating temperature range (C) 0 to 70 Gate drive (Typ) (A) 1 Features Error Amplifier, Multi-topology, Soft Start Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other PWM controllers & resonant controllers

Features

  • Dual Output Drive Stages in Push-Pull
    Configuration
  • 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
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Description

The UCCx808-x is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCCx808 contains all of the control and drive circuitry required for offline or DC-to-DC fixed frequency current-mode switching power supplies with minimal external parts count.

The UCCx808-x 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%.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet UCCx808-x Low Power Current Mode Push-Pull PWM datasheet (Rev. E) Aug. 31, 2015
Application note Current Doubler Rectifier Offers Ripple Current Cancellation Sep. 21, 2004

Design & development

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CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options

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