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UC1825A-DIE

ACTIVE

Space-grade, 30-V input, 2-A dual-output 1-MHz PWM controller in DIE

Product details

Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Error amplifier, Leading edge blanking, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.2/8.4 Operating temperature range (°C) 25 to 25 Rating Space Gate drive (typ) (A) 2 Radiation, SEL (MeV·cm2/mg) Bipolar
Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Error amplifier, Leading edge blanking, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.2/8.4 Operating temperature range (°C) 25 to 25 Rating Space Gate drive (typ) (A) 2 Radiation, SEL (MeV·cm2/mg) Bipolar
DIESALE (TD) See data sheet
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • Compatible With Voltage-Mode or Current-Mode Control Methods
  • Practical Operation at Switching Frequencies
  • 50-ns Propagation Delay to Output
  • High-Current Dual Totem Pole Outputs
  • Trimmed Oscillator Discharge Current
  • Low 100-µA Startup Current
  • Pulse-by-Pulse Current Limiting Comparator
  • Latched Overcurrent Comparator With Full Cycle Restart

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • Compatible With Voltage-Mode or Current-Mode Control Methods
  • Practical Operation at Switching Frequencies
  • 50-ns Propagation Delay to Output
  • High-Current Dual Totem Pole Outputs
  • Trimmed Oscillator Discharge Current
  • Low 100-µA Startup Current
  • Pulse-by-Pulse Current Limiting Comparator
  • Latched Overcurrent Comparator With Full Cycle Restart

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

The UC1825A-DIE PWM controller is an improved version of the standard UC1825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 μA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2-A peak currents during transitions.

The UC1825A-DIE PWM controller is an improved version of the standard UC1825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 μA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2-A peak currents during transitions.

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* Data sheet Rad-Tolerant, High-Speed PWM Controller datasheet 05 Jun 2013
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 14 Dec 2020

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