UCC28515 Status: ACTIVE

Advanced PFC/PWM Combination Controllers

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Datasheet

Advanced PFC/PWM Combination Controllers (Rev. C) (PDF 900 KB) 7503 views
14 Sep 2005

	UCC28515
UVLO Thresholds On/Off(V)	10.2/9.7
Operating Supply(Max)(V)	18
Startup Current(mA)	0.1
Operating Supply Current(mA)	4
Practical Operating Frequency(Max)(MHz)	0.5
Pin/Package	20PDIP, 20SOIC
Rating	Catalog
	Samples
	Inventory

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Product Information

Features

Provides Control of PFC and PWM Power Stages In One Device
Leading-Edge PFC, Trailing-Edge PWM Modulation for Reduced Ripple
Built-In Sequencing of PFC and PWM Turn-On
2-A Source and 3-A Sink Gate Drive for Both PFC and PWM Stages
Typical 16-ns Rise Time and 7-ns Fall Time into 1-nF Loads
PFC Features
- Average-Current-Mode Control for Continuous Conduction Mode Operation
- Highly-Linear Multiplier for Near-Unity Power Factor
- Input Voltage Feedforward Implementation
- Improved Load Transient Response
- Accurate Power Limiting
- Zero Power Detect
PWM Features
- Peak-Current-Mode Control Operation
- 1:1 or 1:2 PFC:PWM Frequency Options
- Programmable maximum duty cycle
- Programmable Soft-Start
- Two Hysteresis Options for Differing Hold-Up Time Requirements

Description

The UCC28510 series of combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the IEC1000–3–2 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. By managing the modulation mechanisms of the two stages (leading-edge modulation for PFC and trailing-edge modulation for PWM), the ripple current in the boost capacitor is minimized.

Based on the average current mode control architecture with input voltage feedforward of prior PFC/PWM combination controllers, these devices offer performance advantages. Two new key PWM features are programmable maximum duty cycle and the 2x PWM frequency options to the base PFC frequency. For the PFC stage, the devices feature an improved multiplier and the use of a transconductance amplifier for enhanced transient response.

The core of the PFC section is in a three-input multiplier that generates the reference signal for the line current. The UCC28510 series features a highly linearized multiplier circuit capable of producing a low distortion reference for the line current over the full range of line and load conditions. A low-offset, high-bandwidth current error amplifier ensures that the actual inductor current (sensed through a resistor in the return path) follows the multiplier output command signal. The output voltage error is processed through a transconductance voltage amplifier.

The transient response of the circuit is enhanced by allowing a much faster charge/discharge of the voltage amplifier output capacitance when the output voltage falls outside a certain regulation window. A number of additional features such as UVLO circuit with selectable hysteresis levels, an accurate reference voltage for the voltage amplifier, zero power detect, OVP/enable, peak current limit, power limiting, high-current output gate driver characterize the PFC section.

The PWM section features peak current mode control (with a ramp signal available to add slope compensation), programmable soft-start, accurate maximum duty cycle clamp, peak current limit and high-current output gate driver. The oscillator for the combination controller is available in two versions. In UCC28510, UCC28511, UCC28512, and UCC28513, the PWM and the PFC circuits are switched at the same frequency. In the UCC28514, UCC28515, UCC28516, and UCC28517, the PWM stage frequency is twice that of the PFC frequency. The PWM stage is suppressed until the PFC output has reached 90% of its programmed value during startup. During line dropout and turn off, the device allows the PWM stage to operate until the PFC output has dropped to 47% (UCC28512, UCC28513, UCC28516, and UCC28517) or 71% (UCC28510, UCC28511, UCC28514, and UCC28515) of its nominal value. See available options table on page 1 for a summary of options.

The UCC28510 family also features leading-edge modulation for the PFC stage and trailing-edge modulation for the PWM stage in order to reduce the ripple current in the boost output capacitor. The current amplifier implementation associated with this scheme also results in better noise immunity.

Available in 20-pin N and DW packages.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
UCC28515DW	ACTIVE	-40 to 105	2.10 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE
UCC28515DWG4	ACTIVE	-40 to 105	2.10 \| 1ku	SOIC (DW) \| 20	View	25 \| TUBE
UCC28515DWR	ACTIVE	-40 to 105	1.90 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Purchase Samples
UCC28515DWRG4	ACTIVE	-40 to 105	1.90 \| 1ku	SOIC (DW) \| 20	View	2000 \| LARGE T&R	Purchase Samples
UCC28515N	ACTIVE	-40 to 105	2.55 \| 1ku	PDIP (N) \| 20	View	20 \| TUBE
UCC28515NE4	ACTIVE	-40 to 105	2.55 \| 1ku	PDIP (N) \| 20	View	20 \| TUBE

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status	Reported Distributor Inventory
UCC28515DW	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	1 Week	Americas	DigiKey	110
	1 Week	Asia	WPI	62
UCC28515DWG4	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	1 Week	Americas	DigiKey	Available
UCC28515DWR	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	20 Weeks	Americas	DigiKey	Available
UCC28515DWRG4	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	20 Weeks	Americas	DigiKey	Available
	20 Weeks	Asia	WPI	>1k
UCC28515N	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	DigiKey	323
		Americas	Rochester Electronics	>1k
		Asia	WPI	68
UCC28515NE4	As of 8:04 AM GMT, 03 Jul 2009	As of 8:04 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
UCC28515DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC28515DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC28515DWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC28515DWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC28515N	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
UCC28515NE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for UCC28515

Tools & Software

Name	Part #	Company	Tool / Software Type
UCC28514 Evaluation Module	UCC28514EVM	Texas Instruments	Development Boards/EVMs
UCC28521 Evaluation Module	UCC28521EVM	Texas Instruments	Development Boards/EVMs

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TPS5420	5.5V to 36V, 2A, 500kHz Step Down SWIFT™ Converter	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.

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UCC28515 Status: ACTIVE

Advanced PFC/PWM Combination Controllers

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