UC1525BLQMLV

调节脉冲宽度调制器 Regulating Pulse Width Modulators

DESCRIPON

The UC1525B pulse width modulator integrated circuit is designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip 5.1-V 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.

FEATURES

• QML-V Qualified, SMD 5962-89511

• Rad-Tolerant: 30 kRad Si TID 1

• 8-V to 35-V Operation

• 5.1-V Buried Zener Reference Trimmed to ±0.75%

• 100-Hz to 400-kHz 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