UC3525ADWG4

TEXAS INSTRUMENTS  UC3525ADWG4  控制器, PWM, 35V-4.5V电源, 500 kHz, 5.2V/100mA输出, SOIC-16

The is a Pulse Width Modulation PWM 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 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 provides a wide range of dead-time adjustment. It also feature 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.

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Separate oscillator sync terminal

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Adjustable deadtime control

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Internal soft-start

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Pulse-by-pulse shutdown

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Input under-voltage lockout with hysteresis

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Latching PWM to prevent multiple pulses

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Dual source/sink output drivers

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Green product and no Sb/Br

Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.