Economy primary side controller with 150V/8V UVLO, -40C to 85C
Product details
Parameters
Package | Pins | Size
Features
- User Programmable Soft Start With Active Low Shutdown
- User Programmable Maximum Duty Cycle
- Accessible 5V Reference
- Undervoltage Lockout
- Operation to 1MHz
- 0.4A Source/0.8A Sink FET Driver
- Low 100µA Startup Current
Description
The UCC3809 family of BCDMOS economy low power integrated circuits contains all the control and drive circuitry required for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count. Internally implemented circuits include undervoltage lockout featuring startup current less than 100µA, a user accessible voltage reference, logic to ensure latched operation, a PWM comparator, and a totem pole output stage to sink or source peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.
Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3809 family also features full cycle soft start.
The family has UVLO thresholds and hysteresis levels for off-line and DC-to-DC systems as shown in the table to the left.
The UCC3809 and the UCC2809 are offered in the 8 pin SOIC (D), PDIP (N), TSSOP (PW), and MSOP (P) packages. The small TSSOP and MSOP packages make the device ideal for applications where board space and height are at a premium.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | Economy Primary Side Controller datasheet (Rev. B) | Nov. 19, 2004 |
User guide | 10-Watt Flyback Converter Utilizing the UCC3809 (Rev. B) | Sep. 14, 2001 | |
User guide | U-165 Reference Design: Isolated 50 Watt Flyback Converter Using | Jun. 20, 2001 | |
Application note | Programming the UCC3809 for 90% Maximum Duty Cycle Clamp | Jun. 04, 2001 | |
Application note | DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode | Sep. 05, 1999 | |
Application note | DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers | Sep. 05, 1999 | |
Application note | U-165 Design Rvw: Isolated 50 W Flyback Converter Using UCC3809 and UC3965 | Sep. 05, 1999 | |
Application note | U-168 Implementing a Practical Off-line Lithium-Ion Charger Using the UCC3809 | Sep. 05, 1999 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The UCC3809EVM evaluation module is an isolated 10-W, 3.3-V converter designed for telecom input voltages, nominally -48 Vdc, but ranging from -32 Vdc to -75 Vdc. The UCC3809 economy primary-side controller is used as the pulse-width modulator (PWM), combined with a TLV431 low-voltage (...)
Design tools & simulation
Reference designs
Design files
-
download PMP4113 BOM.pdf (29KB) -
download PMP4113 PCB.pdf (84KB) -
download PMP4113 Gerber.zip (129KB)
Design files
-
download PMP7361 BOM.pdf (35KB) -
download PMP7361 Gerber.zip (270KB)
Design files
-
download PMP9203 BOM.pdf (80KB)
Design files
-
download PMP4308 BOM.pdf (47KB)
Design files
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
TSSOP (PW) | 8 | View options |
VSSOP (DGK) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.