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UC2825
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UC2825

  • Category:ACDC- and -DCDC-power supply
  • Product Name:High-speed PWM controller
  • Manufacturers:TI
  • Production Batch Number:09+
  • Encapsulation:16PDIP, 16SOIC, 20PLCC
  • Stock Status:There is stock
  • Stock Quantity:4500
  • Minimum order quantity: 1
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  • Product introduction

The PWM control IC UC1825 series is best suited for high frequencies in switching power supply applications. Special attention is given to minimizing the propagation delay of the amplifier logic circuit by comparing and maximizing the bandwidth and slew rate of the error. The controller is designed for either current mode or voltage mode systems with input voltage feed-forward functionality.

The protection circuit includes a 1V threshold current-limit comparator, compatible TTL shutdown port and soft-start pin, which doubles to the maximum duty cycle clamp. The logic where full locking provides free operation of jitter, prohibiting multiple pulses at the output. The same 800mV hysteresis undervoltage lockout ensures low start-up current.

characteristic
  • Suitable for voltage or current mode topologies
  • The actual operating switching frequency is 1MHz
  • 50ns propagation delay to output
  • High-current dual totem (1.5A peak) pole output
  • Wideband error amplifier
  • Full lock-in logic double-pulse suppression
  • The pulse is limited by the pulse current
  • Soft start/max. Duty cycle control
  • Undervoltage lockout and hysteresis
  • Niedriger Anlaufstrom (Punkt für Punkt)
parameter
    UC2825  
topology   Boost, flyback, forward, full bridge, half bridge, push and pull  
Control method   Current mode  
Duty cycle (max.) (%)   50  
Frequency (max) (khertz)   1000  
On/Off of Undervoltage Lockout Threshold (5)   9.2/8.4  
Pins/Packets   16PDIP,16SOIC,20PLCC  
(#) Regulated output   2  
Operating temperature range(°C)   -40 to 85  

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