UCC38C43 Status: ACTIVE

BiCMOS Low-Power Current Mode PWM Controller

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Datasheet

BiCMOS Current Mode PWM Controller (Rev. D) (PDF 622 KB)
13 Dec 2006

	UCC28C43	UCC38C43
Topology	Boost, Flyback, Forward	Boost, Buck, Flyback, Forward
Control Method	Current Mode	Current Mode
Duty Cycle(Max)(%)	100	100
PWM Outputs(#)	1	1
Frequency(Max)(kHz)	1000	1000
UVLO Thresholds On/Off(V)	8.4/7.6	8.4/7.6
Pin/Package	8MSOP, 8PDIP, 8SOIC	8MSOP, 8PDIP, 8SOIC
Regulated Outputs(#)	1	1
Thermal Shutdown	No	No
	Samples	Samples
	Inventory	Inventory

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Product Information

Features

Enhanced Replacement for UC3842A Family With Pin-to-Pin Compatibility
1-MHz Operation
50-µA Start-Up Current, 100-µA Maximum
Low Operating Current of 2.3 mA at 52 kHz
Fast 35-ns Cycle-by-Cycle Overcurrent Limiting
±1-A Peak Output Current
Rail-to-Rail Output Swings with 25-ns Rise and 20-ns Fall Times
±1% Initial Trimmed 2.5-V Error Amplifier Reference
Trimmed Oscillator Discharge Current
New Under Voltage Lockout Versions
MSOP-8 Package Minimizes Board Space
APPLICATIONS
- Switch-Mode Power Supplies
- dc-to-dc Converters
- Board Mount Power Modules

Description

UCC38C4x family is a high-performance current-mode PWM controller. It is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UC384xA family and UC384x family of PWM controllers. In addition, lower startup voltage versions of 7 V are offered as UCC38C40 and UCC38C41.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz with low start-up and operating currents, thus minimizing start-up loss and low operating power consumption for improved efficiency. The device also features a very fast current-sense-to-output delay time of 35 ns and a ±1 A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

View All Description in Datasheet

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
UCC38C43D	ACTIVE	0 to 70	0.75 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
UCC38C43DG4	ACTIVE	0 to 70	0.75 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
UCC38C43DGK	ACTIVE	0 to 70	0.75 \| 1ku	MSOP (DGK) \| 8	View	80 \| TUBE
UCC38C43DGKG4	ACTIVE	0 to 70	0.75 \| 1ku	MSOP (DGK) \| 8	View	80 \| TUBE
UCC38C43DGKR	ACTIVE	0 to 70	0.70 \| 1ku	MSOP (DGK) \| 8	View	2500 \| LARGE T&R	Purchase Samples
UCC38C43DGKRG4	ACTIVE	0 to 70	0.70 \| 1ku	MSOP (DGK) \| 8	View	2500 \| LARGE T&R	Purchase Samples
UCC38C43DR	ACTIVE	0 to 70	0.70 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
UCC38C43DRG4	ACTIVE	0 to 70	0.70 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
UCC38C43P	ACTIVE	0 to 70	0.90 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE
UCC38C43PG4	ACTIVE	0 to 70	0.90 \| 1ku	PDIP (P) \| 8	View	50 \| 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

Reported Distributor Inventory as of 9:48 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksUCC38C43D
Americas	Arrow	375
Asia	WPI	65
Europe	Avnet-SILICA	25
TI Lead Time*: 20 WeeksUCC38C43DG4
Asia	Farnell Asia	146
Europe	Farnell	146
TI Lead Time*: 20 WeeksUCC38C43DGK
Americas	Avnet	21
	Newark	286
	Rochester Electronics	>1k
Europe	Avnet-SILICA	160
Worldwide	DigiKey	291
TI Lead Time*: 20 WeeksUCC38C43DGKG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC38C43DGKR
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC38C43DGKRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksUCC38C43DR
None Reported View Distributors
TI Lead Time*: 20 WeeksUCC38C43DRG4
None Reported View Distributors
TI Lead Time*: 14 WeeksUCC38C43P
Americas	Rochester Electronics	>1k
Asia	WPI	40
Worldwide	DigiKey	9
TI Lead Time*: 14 WeeksUCC38C43PG4
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
UCC38C43D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC38C43DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC38C43DGK	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC38C43DGKG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC38C43DGKR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC38C43DGKRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UCC38C43DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC38C43DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
UCC38C43P	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
UCC38C43PG4	Green (RoHS & no Sb/Br)	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 UCC38C43

Reference Designs

Description	Part #	Company
Boost Reference Design	PMP420	Texas Instruments

Simulation Models

PSpice Model
- UCC28C43 PSpice Transient Model (ZIP, 101 KB) 197 views
  09 Dec 2008

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
UCC38C42	BiCMOS Low-Power Current Mode PWM Controller	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.
UCC28C43	BiCMOS Low-Power Current Mode PWM Controller	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.
TPS54331	3A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-mode ™	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.
UCC27424	Dual 4A MOSFET Driver	AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS	TI customers also evaluated this product.
TPS54231	2A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-Mode ™	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.

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UCC38C43 Status: ACTIVE

BiCMOS Low-Power Current Mode PWM Controller

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