Key facts
- Brand
- UNITRODE
- Model
- UCC1580-1
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-01
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UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(2)
The UCC3580 family of PWM controllers is designed to implement active clamp/reset and synchronous rectifier switching converter topologies. The design includes an auxiliary switch driver that complements the main power switch with a programmable deadtime or delay between each transition. This approach allows operation of single-ended converters beyond 50% duty cycle while reducing voltage stresses on the switches and recovering energy stored in parasitic elements.
Read onlineUNITRODE UCC1580-1 specifications
| Frequency | 370 to 430 kHz |
|---|---|
| Supply Current (Operating) | 1.5 mA |
| VDD On Threshold (-2/-4) | 15V |
| OUT1 Sourcing Current | 0.5A |
| OUT1 Sinking Current | 1A |
| OUT2 Drive Current | +0.3A |
| Temperature Range (UCC1580) | -55°C to +125°C |
| Temperature Range (UCC2580) | -40°C to +85°C |
| Temperature Range (UCC3580) | 0°C to +70°C |
Source: UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(2)
All UNITRODE UCC1580-1 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the function of the DELAY pin?
A resistor from DELAY to GND programs the nonoverlap delay between OUT1 and OUT2.
From: UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(2)
How is the switching frequency programmed?
The oscillator is programmed with two resistors and a capacitor to set switching frequency and maximum duty cycle.
From: UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(2)
What is the startup current of the UCC1580?
The chip requires a low startup current of only 160 µA when VDD is under the UVLO threshold.
From: UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(1)
How does the chip stop operation?
When the SHTDWN comparator input drops below its 0.5V threshold, OUT1 goes low and OUT2 continues to oscillate with guaranteed off time.
From: UNITRODE UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 handbook(1)
What is the startup current of the UCC1580 family?
The startup current is 100 µA.
From: Unitrode UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 PWM Controller Datasheet
What is the typical operating supply current?
The typical operating supply current is 1.5 mA.
From: Unitrode UCC1580-1/-2/-3/-4 UCC2580-1/-2/-3/-4 UCC3580-1/-2/-3/-4 PWM Controller Datasheet