UCC3800PWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UCC3800PWG4 is a current-mode PWM controller capable of operating at frequencies up to 1000 kHz with a 1 A gate drive output, designed for switch-mode power supply designs in an 8-pin TSSOP package. It accepts input voltages from 7.5 V to 12 V and provides precise pulse-width modulation with peak current-mode control for stable regulation. Available from authorized distributors with worldwide shipping for AC/DC and DC/DC converter applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3800PWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control at frequencies up to 1000 kHz enabling high-frequency compact SMPS designs with fast transient response and cycle-by-cycle current limiting
- 1 A peak gate drive output sufficient to directly drive power MOSFETs in flyback, forward, and buck-boost converter topologies without external gate driver buffers
- Wide input voltage range of 7.5 V to 12 V in a compact 8-pin TSSOP package for easy integration into isolated and non-isolated switch-mode power supplies
Applications
The UCC3800PWG4 is used as the primary control IC in offline flyback converters, forward converters, and DC/DC power modules where current-mode control at up to 1000 kHz enables small magnetic component size and rapid load-transient response. It is also applied in industrial 24 V power supplies, telecom DC/DC converters, and battery charger stages where the 1 A gate drive capability simplifies MOSFET switching without auxiliary driver circuits.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 12V |
| Input Voltage-Min | 7.5V |
| Input Voltage-Nom | 10V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 1mA |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC3800PWG4:
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
At what switching frequency can the UCC3800PWG4 operate, and how does this affect transformer size?
The UCC3800PWG4 supports PWM switching frequencies up to 1000 kHz; operating at 500 kHz to 1000 kHz reduces transformer core size by 4x to 8x compared to 50 kHz to 100 kHz designs, allowing power supply engineers to use ferrite cores with E13 or EE16 dimensions for output power levels up to 20 W in flyback and forward converter topologies.
How does current-mode control in the UCC3800PWG4 improve power supply protection during overload conditions?
Current-mode control in the UCC3800PWG4 terminates each PWM pulse the instant the inductor or transformer peak current exceeds the programmed cycle-by-cycle current limit, clamping primary switch current within one 1 µs cycle and preventing transformer saturation during output short circuits, capacitive inrush, or sudden load transients without requiring a separate current sense comparator.
What input voltage range does the UCC3800PWG4 require, and which supply rails can power it directly?
The UCC3800PWG4 requires a supply voltage between 7.5 V and 12 V (nominal 10 V), meaning it can be powered directly from a 9 V auxiliary winding in offline converters, from a 10 V or 12 V pre-regulator in DC/DC modules, or from a 12 V logic supply rail in industrial power stages without requiring a separate voltage regulator for the controller IC.
How does the 1 A gate drive of the UCC3800PWG4 influence MOSFET selection for the power stage?
The 1 A peak gate drive output of the UCC3800PWG4 can charge and discharge MOSFET gate capacitances up to approximately 10 nC within 10 ns, supporting direct drive of medium-size power MOSFETs such as those with 5 nC to 8 nC gate charge in flyback primary switch positions operating at 500 kHz, eliminating the need for dedicated gate driver ICs like UCC27517 in low-to-medium power designs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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