Key facts
- Brand
- Texas Instruments
- Model
- UCC2
- Industry
- Industrial
- Documents
- 5
- Languages
- EN
- Last added
- 2012-08-03
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Texas Instruments UCC1809-1/-2, UCC2809-1/-2, UCC3809-1/-2 Economy Primary Side Controller Handbook
The UCC1809‑1/-2, UCC2809‑1/-2 and UCC3809‑1/-2 are BCDMOS economy low‑power primary‑side controllers for off‑line and isolated flyback converters. The document describes their integrated functions, such as programmable soft‑start, UV‑lockout, 5 V reference, and a 0.4 A source/0.8 A sink FET driver.
Key sections include electrical characteristics tables, pin descriptions, typical application diagrams, oscillator design, synchronization options, mechanical package data, and revision history. The handbook provides design guidance for setting oscillator frequency, duty‑cycle limits, and component selection.
Texas Instruments UCC2 specifications
| Oscillator Frequency | 175 kHz – 228 kHz |
|---|---|
| Maximum Duty Cycle | 75 % – 81 % (typical 78 %) |
| Supply Voltage (Ipp = 10 mA) | 13.5 V |
| Supply Current | 30 mA |
| OUT Low Level Voltage | 0.4 V – 1 V (100 mA load) |
Source: Texas Instruments UCC1807/UCC2807/UCC3807 PWM Controller Handbook
All Texas Instruments UCC2 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- TEXAS INSTRUMENTS UCC2813-0/-1/-2/-3/-4/-5-Q1 handbook
- Texas Instruments UCC1807/UCC2807/UCC3807 PWM Controller Handbook 15 p
- Texas Instruments UCC1800/1/2/3/4/5 UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 Low-Power BiCMOS Current-Mode PWM Handbook 23 p
- TEXAS INSTRUMENTS UCC2813-0/-1/-2/-3/-4/-5 UCC3813-0/-1/-2/-3/-4/-5 Low Power Economy BiCMOS Current Mode PWMhandbook 20 p
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the typical maximum duty‑cycle of the UCC3807 family?
The typical maximum duty‑cycle is 78 %, with a range from 75 % to 81 %.
From: Texas Instruments UCC1807/UCC2807/UCC3807 PWM Controller Handbook
What supply voltage rating is specified for the devices?
The devices are rated for a supply voltage of up to 13.5 V (Ipp = 10 mA).
From: Texas Instruments UCC1807/UCC2807/UCC3807 PWM Controller Handbook
What is the startup current of the UCC3809 family?
The startup current is less than 100 µA.
From: Texas Instruments UCC1809-1/-2, UCC2809-1/-2, UCC3809-1/-2 Economy Primary Side Controller Handbook
What is the maximum duty cycle that can be programmed?
The controller can be programmed for a maximum duty cycle of 70 %.
From: Texas Instruments UCC1809-1/-2, UCC2809-1/-2, UCC3809-1/-2 Economy Primary Side Controller Handbook
What is the typical starting supply current for these devices?
The typical starting supply current is 100 µA.
What is the typical starting supply current for the UCC2813/UCC3813?
The typical starting supply current is 100 µA.