UC1825A-DIE
www.ti.com SLUSBL3 – JUNE 2013 RAD-TOLERANT, HIGH-SPEED PWM CONTROLLER
Check for Samples: UC1825A-DIE FEATURES 1 (1) Rad-Tolerant: 30 kRad (Si) TID (1)
Compatible With Voltage-Mode or CurrentMode Control Methods
Practical Operation at Switching Frequencies
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. 50-ns Propagation Delay to Output
High-Current Dual Totem Pole Outputs
Trimmed Oscillator Discharge Current
Low 100-ОјA Startup Current
Pulse-by-Pulse Current Limiting Comparator
Latched Overcurrent Comparator With Full
Cycle Restart DESCRIPTION
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 ОјA, 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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