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UCC35702

ACTIVE

15V VCC, 1A Driver single ended 700KHz voltage mode PWM controller with 9.6V/8.8V UVLO, 0C to 70C

Product details

Topology Boost, Flyback Control mode Voltage Duty cycle (max) (%) 99 Switching frequency (max) (kHz) 700 Features Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.9/9.1 Operating temperature range (°C) 0 to 70 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 15
Topology Boost, Flyback Control mode Voltage Duty cycle (max) (%) 99 Switching frequency (max) (kHz) 700 Features Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.9/9.1 Operating temperature range (°C) 0 to 70 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 15
SOIC (D) 14 51.9 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4
  • 700kHz Operation
  • Integrated Oscillator/Voltage Feed Forward Compensation
  • Accurate Duty Cycle Limit
  • Accurate Volt-second Clamp
  • Optocoupler Interface
  • Fault Counting Shutdown
  • Fault Latch off or Automatic Shutdown
  • Soft Stop Optimized for Synchronous Rectification
  • 1A Peak Gate Drive Output
  • 130µA Start-up Current
  • 750µA Operating Current
  • 700kHz Operation
  • Integrated Oscillator/Voltage Feed Forward Compensation
  • Accurate Duty Cycle Limit
  • Accurate Volt-second Clamp
  • Optocoupler Interface
  • Fault Counting Shutdown
  • Fault Latch off or Automatic Shutdown
  • Soft Stop Optimized for Synchronous Rectification
  • 1A Peak Gate Drive Output
  • 130µA Start-up Current
  • 750µA Operating Current

The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source.

The devices feature low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz.

Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured.

Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred.

Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V.

The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D), 14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is offered in the 14 pin CDIP (J) package.

The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source.

The devices feature low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz.

Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured.

Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred.

Two UVLO options are offered. UCC35701 family has turn-on and turn-off thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V.

The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D), 14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is offered in the 14 pin CDIP (J) package.

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Technical documentation

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Type Title Date
* Data sheet Advanced Voltage Mode Pulse Width Modulator datasheet (Rev. C) 17 Jun 2005
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
More literature Seminar 300 Topic 8 - Switching Power Supply Design Review 15 Feb 2001
More literature Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors 15 Feb 2001
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 Sep 1999
Application note U-150 Applying the UCC3570 Voltage-Mode PWM Controller to Both Off-Line 05 Sep 1999

Design & development

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Package Pins Download
SOIC (D) 14 View options
TSSOP (PW) 14 View options

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