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Product Summary
The UC2525ADWTR is a regulating 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 reference is trimmed to ±1% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the UC2525ADWTR 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 provides a wide range of dead-time adjustment. The UC2525ADWTR also features built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands.
Parametrics
UC2525ADWTR absolute maximum ratings: (1)Supply Voltage, (+VIN): +40V; (2)Collector Supply Voltage (VC): +40V; (3)Logic Inputs: -0.3V to +5.5V; (4)Analog Inputs: -0.3V to +VIN; (5)Output Current, Source or Sink: 500mA; (6)Reference Output Current: 50mA; (7)Oscillator Charging Current: 5mA; (8)Power Dissipation at TA = +25℃: 1000mW; (9)Power Dissipation at TC = +25℃: 2000mW; (10)Operating Junction Temperature: -55℃ to +150℃; (11)Storage Temperature Range: -65℃ to +150℃; (12)Lead Temperature (Soldering, 10 seconds): +300℃.
Features
UC2525ADWTR features: (1)8 to 35V Operation; (2)5.1V Reference Trimmed to ±1%; (3)100Hz to 500kHz Oscillator Range; (4)Separate Oscillator Sync Terminal; (5)Adjustable Deadtime Control; (6)Internal Soft-Start; (7)Pulse-by-Pulse Shutdown; (8)Input Undervoltage Lockout with Hysteresis; (9)Latching PWM to Prevent Multiple Pulses; (10)Dual Source/Sink Output Drivers.
Diagrams
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 UC2525ADWTR |
Texas Instruments |
Voltage Mode PWM Controllers Regulating Pulse Width Modulator |
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UC2525ADWTRG4 |
Texas Instruments |
Voltage Mode PWM Controllers Regulating Pulse Width Modulator |
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