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UCC3807D-2
Texas Instruments
IC OFFLINE SWITCH MULT TOP 8SOIC
1309 Pcs New Original In Stock
Converter Offline Boost, Buck, Flyback, Forward Topology 1MHz 8-SOIC
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5.0 / 5.0
- (45 Ratings)
UCC3807D-2
Product Overview
1839981
DiGi Electronics Part Number
UCC3807D-2-DGManufacturer
Texas Instruments
UCC3807D-2
Description
IC OFFLINE SWITCH MULT TOP 8SOICInventory
1309 Pcs New Original In Stock
Converter Offline Boost, Buck, Flyback, Forward Topology 1MHz 8-SOIC
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
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UCC3807D-2 Technical Specifications
Category
Power Management (PMIC), AC DC Converters, Offline Switches
Packaging
Tube
Series
-
Product Status
Active
Output Isolation
Isolated
Internal Switch(s)
No
Voltage - Breakdown
-
Topology
Boost, Buck, Flyback, Forward
Voltage - Start Up
12.5 V
Voltage - Supply (Vcc/Vdd)
8.3V ~ 13.5V
Duty Cycle
78%
Frequency - Switching
1MHz
Fault Protection
Current Limiting
Control Features
-
Operating Temperature
-55°C ~ 150°C (TJ)
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Mounting Type
Surface Mount
Base Product Number
UCC3807
Datasheet & Documents
HTML Datasheet
UCC3807D-2-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
-296-2542-5
-296-2542-5-DG
Q16379767
296-2542-5
-UCC3807D-2G4-NDR
296-UCC3807D-2-CRL
TEXTISUCC3807D-2
UCC3807D2
-UCC3807D-2G4
-UCC3807D-2-NDR
UCC3807D-2G4
296-2542-5-NDR
2156-UCC3807D-2-TI
UCC3807D-2G4-DG
Standard Package
75
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
DiGi Electronics一直是我信賴的品牌，他們的產品品質真的一流，讓我很放心！
Dec 02, 2025
Delivery was faster than expected, and my order arrived safely thanks to their reliable logistics.
Dec 02, 2025
Impressed by how DiGi Electronics provides premium packaging at a budget-friendly price.
Dec 02, 2025
I appreciate how they keep me informed at every stage of shipping, from order confirmation to delivery.
Dec 02, 2025
Quality, affordability, and friendly service—DiGi Electronics delivers all three.
Dec 02, 2025
I love how swiftly DiGi Electronics processes my orders — no unnecessary delays.
Dec 02, 2025
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Frequently Asked Questions (FAQ)
What are the key thermal design considerations when using the UCC3807D-2 in a high-frequency flyback converter operating near 1MHz?
When using the UCC3807D-2 in a 1MHz flyback design, thermal performance is critical due to increased core and switching losses. The UCC3807D-2 supports up to 1MHz switching, but at this frequency, PCB layout and heatsinking become crucial—especially given its 8-SOIC package with limited thermal pad exposure. Ensure adequate copper pour on the VCC, GND, and RT/CT pins to dissipate heat. Monitor junction temperature closely, as exceeding 150°C TJ can trigger thermal shutdown or accelerate aging. Use a temperature-aware feedback loop and consider derating max load above 85°C ambient to maintain reliability in enclosed environments.
How does the UCC3807D-2 compare to the UC3844BD1 in terms of startup voltage and supply range for offline low-power SMPS designs?
The UCC3807D-2 has a higher startup threshold of 12.5V compared to the UC3844BD1’s 16V, enabling earlier ramp-up in low-input scenarios. However, the UCC3807D-2 operates within a tighter supply range (8.3V to 13.5V VCC), requiring tighter regulation of the VCC winding, unlike the UC3844BD1 which tolerates up to 36V. When replacing a UC3844BD1 with the UCC3807D-2, ensure the bias supply doesn't exceed 13.5V under transient or light-load conditions—use a Zener clamp or auxiliary regulation. Also, the UCC3807D-2’s higher 1MHz capability allows smaller magnetics but demands better EMI filtering.
What are the risks of operating the UCC3807D-2 near its 78% duty cycle limit in a forward converter topology?
Operating the UCC3807D-2 close to its 78% duty cycle limit in forward converters risks saturation of the transformer under line or load transients, especially during startup or brownout conditions. Since the UCC3807D-2 lacks cycle-by-cycle current limiting on the external switch, a prolonged high-duty cycle can lead to transformer overheating or MOSFET failure. To mitigate this, design with a 10–15% duty cycle margin, use a current-sense resistor with fast response, and include slope compensation if operating in continuous conduction mode (CCM). Always verify startup behavior under worst-case input low conditions (8.3V VCC).
Can the UCC3807D-2 safely replace the UC38C44 in existing boost PFC circuits, and what layout adjustments are needed for EMI control at 1MHz?
While the UCC3807D-2 shares functional similarities with the UC38C44, its 1MHz switching capability introduces higher EMI challenges in boost PFC stages. Direct replacement requires reviewing the gate drive strength—UCC3807D-2 drives external MOSFETs but lacks integrated drivers, so add a low-inductance gate drive loop. Use a short, wide trace from OUT to MOSFET gate with a series resistor (5–10Ω) to damp ringing. Place the RT/CT capacitor close to the chip, and use a ground plane under the UCC3807D-2 to minimize noise coupling. Add a small ferrite bead and bypass cap on VCC to handle high dv/dt transients common in PFC circuits.
What reliability issues should be addressed when using the UCC3807D-2 in industrial applications with wide temperature swings from -55°C to 150°C?
The UCC3807D-2 is rated for -55°C to 150°C TJ, making it suitable for harsh environments, but reliability depends on design margins. At extreme cold, ensure startup voltage is still reached—some bias windings may underperform. At high temperatures, derate the external components (like optocouplers and electrolytic caps) since they often fail before the IC. Use 150°C-rated capacitors on timing and feedback networks. Avoid thermal runaway by ensuring VCC regulation doesn’t collapse under load transients. Perform burn-in testing at temperature extremes to validate control loop stability and startup consistency across the full operating range of the UCC3807D-2.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
UCC3807D-2 CAD Models
Texas Instruments UCC3807D-2 PCB symbols & footprints
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