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
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download PMP4113 BOM.pdf (29KB) -
download PMP4113 PCB.pdf (84KB) -
download PMP4113 Gerber.zip (129KB)
Design files
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download PMP7361 BOM.pdf (35KB) -
download PMP7361 Gerber.zip (270KB)
Design files
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download PMP9203 BOM.pdf (80KB)
Design files
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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
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