UCC3818A Status: ACTIVE

BiCMOS Power Factor Preregulator

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Datasheet

UCC3817A/18A BiCMOS PFC (Rev. C) (PDF 871 KB)
26 Mar 2009

	UCC3818A
UVLO Thresholds On/Off(V)	10.5/10
Operating Supply(Max)(V)	18
Startup Current(mA)	0.15
Operating Supply Current(mA)	4
Vref(V)	7.5
Vref tol(%)	1.5
Duty Cycle(Max)(%)	100
Practical Operating Frequency(Max)(MHz)	0.25
Pin/Package	16PDIP, 16TSSOP, 16SOIC
Rating	Catalog
	Samples
	Inventory

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Product Information

Features

Controls Boost Preregulator to Near-Unity Power Factor
Limits Line Distortion
World Wide Line Operation
Over-Voltage Protection
Accurate Power Limiting
Average Current Mode Control
Improved Noise Immunity
Improved Feed-Forward Line Regulation
Leading Edge Modulation
150-µA Typical Start-Up Current
Low-Power BiCMOS Operation
12-V to 17-V Operation
Frequency Range of 6 kHz to 220 kHz

Description

The UCC3817A and the UCC3818A family provides all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac input line current waveform to correspond to that of the ac input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current.

Designed in Texas Instrument’s BiCMOS process, the UCC3817A/UCC3818A offers new features such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry, a leading-edge modulation technique to reduce ripple current in the bulk capacitor and an improved, low-offset (±2 mV) current amplifier to reduce distortion at light load conditions.

The UCC3817A/18A family of PFC Controllers is directly pin for pin compatible with the UCC3817/18 family of devices. Only the output stage of UCC3817A family has been modified to allow use of a smaller external gate drive resistor values. For some power supply designs where an adequately high enough gate drive resistor can not be used, the UCC3817A/18A family offers a more robust output stage at the cost of increasing the internal gate resistances. The gate drive of the UC3817A/18A family however remains strong at ±1.2 A of peak current capability.

UCC3817A offers an on-chip shunt regulator with low start-up current, suitable for applications utilizing a bootstrap supply. UCC3818A is intended for applications with a fixed supply (VCC). Both devices are available in the 16-pin D, N and PW 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
UCC3818AD	ACTIVE	0 to 70	1.50 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE
UCC3818ADG4	ACTIVE	0 to 70	1.50 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE
UCC3818ADR	ACTIVE	0 to 70	1.15 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
UCC3818ADRG4	ACTIVE	0 to 70	1.15 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
UCC3818AN	ACTIVE	0 to 70	1.30 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE
UCC3818ANG4	ACTIVE	0 to 70	1.30 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE
UCC3818APW	ACTIVE	0 to 70	1.50 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE
UCC3818APWG4	ACTIVE	0 to 70	1.50 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE
UCC3818APWR	ACTIVE	0 to 70	1.15 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Purchase Samples
UCC3818APWRG4	ACTIVE	0 to 70	1.15 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Purchase Samples

* 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

Reported Distributor Inventory as of 9:45 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 4 WeeksUCC3818AD
Asia	WPI	64
Europe	Spoerle	120
Worldwide	DigiKey	228
TI Lead Time*: 4 WeeksUCC3818ADG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC3818ADR
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC3818ADRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC3818AN
Americas	Rochester Electronics	>1k
Europe	Avnet-SILICA	75
Worldwide	DigiKey	92
Worldwide	Mouser Electronics	93
TI Lead Time*: 20 WeeksUCC3818ANG4
Worldwide	DigiKey	Available
TI Lead Time*: 4 WeeksUCC3818APW
Americas	Rochester Electronics	>1k
Asia	WPI	51
Europe	EBV Elektronik	45
Worldwide	DigiKey	345
TI Lead Time*: 4 WeeksUCC3818APWG4
None Reported View Distributors
TI Lead Time*: 1 WeekUCC3818APWR
Worldwide	DigiKey	Available
TI Lead Time*: 1 WeekUCC3818APWRG4
Worldwide	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
UCC3818AD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC3818ADG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC3818ADR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC3818ADRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC3818AN	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
UCC3818ANG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
UCC3818APW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC3818APWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC3818APWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC3818APWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	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 UCC3818A

Tools & Software

Name	Part #	Company	Tool / Software Type
UCC3817EVM BiCMOS Power Factor Preregulator EVM	UCC3817EVM	Texas Instruments	Development Boards/EVMs
UCC2817/17A, UCC2818/18A, UCC3817/17A, UCC3818/18A MathCAD file (Rev. A)(ZIP 154 KB ) 286 views 30 Jul 2008

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UCC3818A Status: ACTIVE

BiCMOS Power Factor Preregulator

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