The UC1525A/1527A 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 5.1-V 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 CT and the discharge terminals provides a wide range of dead-time adjustment. These devices 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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCx52xA Regulating Pulse Width Modulators datasheet (Rev. D) | PDF | HTML | 27 Jul 2017 |
| Technical article | When should you use PWM controllers? | PDF | HTML | 02 Dec 2016 | |
| Technical article | Before digital control, there were general-purpose PWMs | PDF | HTML | 19 Oct 2016 | |
| Application note | DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode | 05 Sep 1999 | ||
| Application note | Understanding Buck Power Stages In Switchmode Power Supplies | 04 Mar 1999 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (N) | 16 | Ultra Librarian |
| SOIC (DW) | 16 | Ultra Librarian |
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