UCC2897AMPWREP Texas Instruments In Stock
UCC2897AMPWREP is an active-clamp forward PWM controller IC by Texas Instruments, designed for high-efficiency isolated DC/DC power supplies switching up to 1 MHz. Key specs: 8 V to 16 V bias supply, programmable dead-time control, and integrated gate drivers. Available in tape-and-reel TSSOP-16 packaging with worldwide distribution.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Active-clamp forward topology controller with adaptive dead-time for zero-voltage switching (ZVS) up to 1 MHz
- Programmable oscillator frequency up to 1 MHz reducing transformer and inductor size
- Integrated high-side and low-side gate drivers for direct MOSFET drive without external buffers
- 8 V to 16 V VCC bias range compatible with standard isolated power supply auxiliary windings
- Enhanced pulse (EP) suffix denoting automotive-grade or extended reliability screening
- TSSOP-16 package enabling compact isolated converter control stage under 50 mm² footprint
Applications
The UCC2897AMPWREP is used in isolated DC/DC converter designs for telecom infrastructure, server power supplies, and industrial power modules where active-clamp forward topology enables high-efficiency energy transfer at switching frequencies up to 1 MHz. Its zero-voltage switching capability reduces MOSFET switching losses in 48 V to 12 V brick converters and quarter-brick power modules used in data center equipment. Automotive-grade isolated power supplies for ADAS ECUs and on-board charger auxiliary rails also use this controller for its reliable performance across -40°C to +125°C junction temperature ranges.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC2897AMPWREP:
Switching Controller, Current-mode, 2.5A, 1000kHz Switching Freq-Max, BICMOS, PDSO20
Switching Controller, Current-mode, 2.5A, 1000kHz Switching Freq-Max, BICMOS, PQCC20
Frequently Asked Questions
What switching frequency can the UCC2897AMPWREP achieve, and how does this reduce passive component size?
The UCC2897AMPWREP supports switching frequencies up to 1 MHz, which allows the isolated forward converter transformer to be designed with a core volume 25 to 64 times smaller than an equivalent 100 kHz design. Higher frequency also reduces output inductor and capacitor values proportionally, enabling compact power modules with total magnetic volume under 1 cm³ in 48 V to 12 V converter designs targeting slim 1U server and telecom blade formats.
How does active-clamp control in the UCC2897AMPWREP improve converter efficiency compared to a hard-switched forward converter?
The active-clamp circuit in the UCC2897AMPWREP recycles the energy stored in the main transformer's leakage inductance by routing it through a clamp capacitor and a secondary MOSFET, enabling zero-voltage switching (ZVS) of the primary switch at turn-on. In a 300 W, 48 V to 12 V forward converter at 500 kHz, ZVS can reduce MOSFET switching losses by 2 W to 5 W compared to hard switching, directly improving full-load efficiency by 0.5% to 1.5% — a meaningful gain in data center power budgets targeting 90%+ efficiency.
What VCC supply voltage range does the UCC2897AMPWREP accept, and how is this typically generated in an isolated supply?
The UCC2897AMPWREP operates from a VCC supply of 8 V to 16 V, a range that conveniently matches the output of a small auxiliary winding on the main power transformer providing 12 V to bias the controller. This eliminates the need for a separate bootstrap regulator IC on the primary side, reducing component count by 3 to 5 parts and simplifying the PCB layout of the controller stage in forward converter reference designs.
In what reliability-critical applications is the EP (enhanced pulse) suffix of the UCC2897AMPWREP specifically qualified?
The EP suffix on the UCC2897AMPWREP denotes Texas Instruments' enhanced product screening, including 1000-hour high-temperature operating life (HTOL) at 125°C and extended qualification testing across -40°C to +125°C junction temperature range. This makes it suitable for automotive ADAS power stages, industrial control modules, and defense-adjacent power electronics where extended product availability and stricter process controls are required beyond standard commercial IC qualification.
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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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