Product details

Topology Boost, Flyback, Forward Duty cycle (Max) (%) 78 Supply voltage (Max) (V) 13.5 UVLO thresholds on/off (V) 7.2/6.9 Features Adjustable Switching Frequency, Error Amplifier, Leading Edge Blanking, Multi-topology, Programmable Max Duty Cycle, Soft Start Operating temperature range (C) -40 to 85 Rating Catalog, Military Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
Topology Boost, Flyback, Forward Duty cycle (Max) (%) 78 Supply voltage (Max) (V) 13.5 UVLO thresholds on/off (V) 7.2/6.9 Features Adjustable Switching Frequency, Error Amplifier, Leading Edge Blanking, Multi-topology, Programmable Max Duty Cycle, Soft Start Operating temperature range (C) -40 to 85 Rating Catalog, Military Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
SOIC (D) 8 19 mm² 3.91 x 4.9
  • User Programmable Maximum PWM Duty Cycle
  • 100-A Startup Current
  • Operation to 1 MHz
  • Internal Full Cycle Soft Start
  • Internal Leading Edge Blanking of Current Sense Signal
  • 1-A Totem Pole Output

  • User Programmable Maximum PWM Duty Cycle
  • 100-A Startup Current
  • Operation to 1 MHz
  • Internal Full Cycle Soft Start
  • Internal Leading Edge Blanking of Current Sense Signal
  • 1-A Totem Pole Output

The UCC3807 family of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and dc-to-dc fixed frequency current mode switching power supplies with minimal external parts count.

These devices are similar to the UCC3800 family, but with the added feature of a user programmable maximum duty cycle. Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.

The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.

The UCC3807 family of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and dc-to-dc fixed frequency current mode switching power supplies with minimal external parts count.

These devices are similar to the UCC3800 family, but with the added feature of a user programmable maximum duty cycle. Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.

The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.

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Technical documentation

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Type Title Date
* Data sheet Programmable Maximum Duty Cycle PWM Controller datasheet (Rev. B) 07 Oct 2010
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Analog Design Journal Downslope compensation for buck converters when the duty cycle exceeds 50% 31 Jan 2012

Design & development

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PDIP (P) 8 View options
SOIC (D) 8 View options

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