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UCC1806J
Texas Instruments
LOW POWER, DUAL OUTPUT, CURRENT
2152 Pcs New Original In Stock
Boost, Flyback, Forward Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 16-CDIP
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5.0 / 5.0
- (103 Ratings)
UCC1806J
Product Overview
11230710
DiGi Electronics Part Number
UCC1806J-DGManufacturer
Texas Instruments
UCC1806J
Description
LOW POWER, DUAL OUTPUT, CURRENTInventory
2152 Pcs New Original In Stock
Boost, Flyback, Forward Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 16-CDIP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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UCC1806J Technical Specifications
Category
Power Management (PMIC), DC DC Switching Controllers
Packaging
-
Series
-
Product Status
Active
Output Type
PWM
Function
Step-Up/Step-Down
Output Configuration
Positive, Isolation Capable
Topology
Boost, Flyback, Forward
Number of Outputs
2
Output Phases
1
Voltage - Supply (Vcc/Vdd)
8V ~ 14.5V
Frequency - Switching
47kHz
Duty Cycle (Max)
50%
Synchronous Rectifier
Yes
Clock Sync
Yes
Serial Interfaces
-
Control Features
Current Limit, Enable, Frequency Control
Operating Temperature
-55°C ~ 125°C (TJ)
Mounting Type
Through Hole
Package / Case
16-CDIP (0.300", 7.62mm)
Supplier Device Package
16-CDIP
Datasheet & Documents
HTML Datasheet
UCC1806J-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
Not Applicable
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-UCC1806J
Standard Package
1
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
製品の性能も良く、品質管理もしっかりしているため安心できます。
Dec 02, 2025
They have an excellent logistics system that ensures rapid and accurate delivery.
Dec 02, 2025
Affordable yet dependable—that's what DiGi Electronics stands for.
Dec 02, 2025
Their dedicated support team quickly addresses after-sales concerns, which we highly appreciate.
Dec 02, 2025
They demonstrate genuine care in their customer interactions, making me feel valued.
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Frequently Asked Questions (FAQ)
What are the key design constraints when using the UCC1806J in a high-vibration industrial environment, and how does its through-hole 16-CDIP package impact long-term reliability compared to surface-mount alternatives?
The UCC1806J’s 16-CDIP through-hole package offers superior mechanical robustness in high-vibration settings like motor drives or heavy machinery, reducing solder joint fatigue risks common with SMD packages. However, its larger footprint and lower thermal conductivity require careful PCB layout—ensure adequate copper pour under the device and use strain relief on leads. While not hermetically sealed, the ceramic DIP construction provides better moisture resistance than plastic variants, but conformal coating is still recommended in humid or corrosive environments to maintain long-term reliability of the UCC1806J.
Can the UCC1806J safely replace a UC3845 in a flyback converter design, and what critical timing and duty cycle limitations must be addressed during the migration?
Direct replacement of a UC3845 with the UCC1806J is not recommended without design modifications. Although both support current-mode control, the UCC1806J has a fixed 50% maximum duty cycle and 47kHz switching frequency, whereas the UC3845 allows higher duty cycles (up to ~90%) and adjustable frequency. This makes the UCC1806J unsuitable for wide-input-range or high-step-up flyback designs that rely on extended on-times. Additionally, the UCC1806J’s dual-output architecture and synchronous rectifier support add complexity if unused—ensure your feedback loop and transformer design align with its inherent limitations to avoid instability or efficiency loss.
How does the UCC1806J handle startup under low-line (8V) conditions in a 24V industrial system, and what external circuitry is needed to prevent latch-up or false triggering during brownouts?
The UCC1806J operates down to 8V Vcc, but at this threshold, internal bias currents and gate drive strength are reduced, increasing the risk of erratic PWM behavior during brownouts. To ensure reliable startup, implement an undervoltage lockout (UVLO) circuit using a precision comparator (e.g., TLV3011) to disable the EN pin until input voltage exceeds ~9.5V. Also, add a soft-start capacitor on the SS pin to limit inrush current and prevent latch-up. Without these safeguards, repeated low-line cycling can stress the controller and downstream MOSFETs, degrading long-term performance of the UCC1806J in 24V systems.
What are the risks of using the UCC1806J in a multi-phase power supply design, given its single-phase architecture and lack of interleaving support?
The UCC1806J is inherently a single-phase controller and cannot synchronize or interleave with other phases, making it unsuitable for true multi-phase applications requiring current sharing or ripple cancellation. Attempting to parallel multiple UCC1806J units without master-slave clocking will result in beat frequencies, increased input/output ripple, and potential thermal imbalance. If your design demands >50W with tight ripple specs, consider a dedicated multi-phase controller like the TI TPS40170 instead. The UCC1806J should only be used in single-phase, dual-output configurations where phase synchronization is not required.
How does the UCC1806J’s synchronous rectifier feature impact efficiency in low-output-voltage (≤3.3V) isolated forward converters, and what layout practices are essential to avoid shoot-through?
The UCC1806J’s integrated synchronous rectifier control significantly improves efficiency in low-voltage forward converters by reducing diode conduction losses—ideal for 3.3V or 5V outputs. However, improper dead-time management between primary-side switching and SR turn-on can cause shoot-through, leading to high peak currents and device failure. Use the controller’s built-in adaptive delay, but validate timing with an oscilloscope under load. Critical layout practices include minimizing loop area between the SR MOSFET, output capacitor, and transformer secondary, and placing the SR driver close to the FET gate. Neglecting these can negate efficiency gains and compromise reliability of the UCC1806J in high-current, low-voltage applications.
Quality Assurance (QC)
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UCC1806J CAD Models
Texas Instruments UCC1806J PCB symbols & footprints
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