Unitrode UC1525B
The UC1525B output stage features NOR logic, giving a LOW output for an OFF state. The UC1527B utilizes OR logic which results in a HIGH output level when OFF.| Part No. | UC1525B |
|---|---|
| Datasheet | UC1525B Download |
| Manufacturer |  Unitrode |
| Description | Regulating Pulse Width Modulators |
| Buy | Stock & Price |
FEATURES
● 8 to 35V Operation● 5.1V Buried Zener Reference Trimmed to ±0.75%
● 100Hz to 500kHz Oscillator Range
● Separate Oscillator Sync Terminal
● Adjustable Deadtime Control
● Internal Soft-Start
● Pulse-by-Pulse Shutdown
● Input Undervoltage Lockout with Hysteresis
● Latching PWM to Prevent Multiple Pulses
● Dual Source/Sink Output Drivers
● Low Cross Conduction Output Stage
● Tighter Reference Specifications BLOCK DIAGRAM
DESCRIPTION
The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time adjustment.
