UC3527AN

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UC3527AN

Regulating Pulse Width Modulators

Packaging

Package | PIN: N | 16
Temp: C (0 to 70)
Carrier: Partial Tube
Qty Price
1-9 $4.66
10-24 $4.19
25-99 $3.91
100-249 $3.51
250-499 $3.27
500-749 $2.85
750-999 $2.47
1000+ $2.42

Features

  • 8-V to 35-V Operation
  • 5.1-V Reference Trimmed to 1%
  • 100-Hz to 500-kHz Oscillator Range
  • Separate Oscillator Sync Terminal
  • Adjustable Dead-Time Control
  • Internal Soft Start
  • Pulse-by-Pulse Shutdown
  • Input Undervoltage Lockout With Hysteresis
  • Latching PWM to Prevent Multiple Pulses
  • Dual Source and Sink Output Drivers

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Texas Instruments  UC3527AN

The UC1525A/1527A series of pulse width modulator integrated circuits are designed tooffer improved performance and lowered external parts count when used in designing all types ofswitching power supplies. The on-chip 5.1-V reference is trimmed to 1% and the input common-moderange of the error amplifier includes the reference voltage, eliminating external resistors. A syncinput to the oscillator allows multiple units to be slaved or a single unit to be synchronized toan external system clock. A single resistor between CT and the dischargeterminals provides a wide range of dead-time adjustment. These devices also feature built-insoft-start circuitry with only an external timing capacitor required. A shutdown terminal controlsboth the soft-start circuitry and the output stages, providing instantaneous turn off through thePWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands.