TL1451A Status: ACTIVE

Dual Channel Controller with Wide Input Voltage Range

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Datasheet

Dual Pulse-Width-Modulation Control Circuits (Rev. E) (PDF 1065 KB)
13 Mar 2002

	TL1451A	TL1451A-EP
Topology	Buck, Boost, Flyback	Buck, Boost, Flyback
Vin(Min)(V)	3.6	3.6
Vin(Max)(V)	50	50
Vout(Min)(V)	1	1
Vout(Max)(V)	50	50
Regulated Outputs(#)	2	2
Iout(Max)(A)	3	3
Switching Frequency(Max)(kHz)	500	500
Iq(Typ)(mA)	1.7	1.7
Pin/Package	16PDIP, 16SO, 16SOIC, 16SSOP, 16TSSOP	16SOIC
Thermal Shutdown	No	No
Vout2(Min)(V)	1	1
Vout2(Max)(V)	50	50
Iout2(A)	3	3
Rating	Catalog	HiRel Enhanced Product
Duty Cycle(Max)(%)	100	100
Vdo(Typ)(mV)	200	200
	Samples	Samples
	Inventory	Inventory

Other qualified versions of TL1451A

Version	Part Number	Definition
Automotive	TL1451A-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects
Enhanced Product	TL1451A-EP	Supports Defense, Aerospace and Medical Applications
Military	TL1451AM	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

TPS40200: Wide Input Non-Synchronous Buck DC/DC Controller
TL5001: PWM Controller with Wide Input Range

Product Information

Features

Complete PWM Power Control Circuitry
Completely Synchronized Operation
Internal Undervoltage Lockout Protection
Wide Supply Voltage Range
Internal Short-Circuit Protection
Oscillator Frequency...500 kHz Max
Variable Dead Time Provides Control Over Total Range
Internal Regulator Provides a Stable 2.5-V Reference Supply
Available in Q-Temp Automotive
HighRel Automotive Applications
Configuration Control / Print Support
Qualification to Automotive Standards

Description

The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low V_CC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational.

The TL1451AC is characterized for operation from -20°C to 85°C. The TL1451AQ is characterized for operation from -40°C to 125°C. The TL1451AM is characterized for operation from -55°C to 125°C.

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
TL1451ACD	ACTIVE	-20 to 85	1.05 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE
TL1451ACDBLE	NRND	-20 to 85		SSOP (DB) \| 16	View		Not Available
TL1451ACDBR	ACTIVE	-20 to 85	0.95 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
TL1451ACDBRG4	ACTIVE	-20 to 85	0.95 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R
TL1451ACDG4	ACTIVE	-20 to 85	1.05 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE
TL1451ACDR	ACTIVE	-20 to 85	0.95 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
TL1451ACDRG4	ACTIVE	-20 to 85	0.95 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
TL1451ACN	ACTIVE	-20 to 85	1.05 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE
TL1451ACNE4	ACTIVE	-20 to 85	1.05 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE
TL1451ACNSR	ACTIVE	-20 to 85	0.95 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R
TL1451ACNSRG4	ACTIVE	-20 to 85	0.95 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R
TL1451ACPW	ACTIVE	-20 to 85	1.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
TL1451ACPWG4	ACTIVE	-20 to 85	1.05 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
TL1451ACPWLE	OBSOLETE	-20 to 85		TSSOP (PW) \| 16	View			Not Available
TL1451ACPWR	ACTIVE	-20 to 85	0.95 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
TL1451ACPWRG4	ACTIVE	-20 to 85	0.95 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R
TL1451AQD	ACTIVE	-40 to 125	1.10 \| 1ku	SOIC (D) \| 16	View	40
TL1451AQDG4	ACTIVE		1.10 \| 1ku	SOIC (D) \| 16	View	40	Purchase Samples
TL1451AQDR	ACTIVE	-40 to 125	1.10 \| 1ku	SOIC (D) \| 16	View	2500	Purchase Samples
TL1451AQDRG4	ACTIVE		1.10 \| 1ku	SOIC (D) \| 16	View	2500	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 10:31 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksTL1451ACD
Americas	Arrow	360
	Avnet	179
	Newark	154
	Rochester Electronics	>1k
Asia	Farnell Asia	526
Asia	WPI	82
Europe	EBV Elektronik	>1k
Europe	Farnell	324
Worldwide	DigiKey	106
Worldwide	Mouser Electronics	2
TI Lead Time*: 20 WeeksTL1451ACDBR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 20 WeeksTL1451ACDBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451ACDG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451ACDR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451ACDRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451ACN
Americas	Newark	459
Americas	Rochester Electronics	>1k
Asia	Farnell Asia	195
Asia	WPI	579
Europe	Avnet-SILICA	25
Europe	Farnell	108
Worldwide	DigiKey	88
Worldwide	Mouser Electronics	505
TI Lead Time*: 20 WeeksTL1451ACNE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451ACNSR
Americas	Rochester Electronics	>1k
TI Lead Time*: 20 WeeksTL1451ACNSRG4
None Reported View Distributors
TI Lead Time*: 20 WeeksTL1451ACPW
Americas	Rochester Electronics	>1k
Asia	WPI	112
Worldwide	Mouser Electronics	23
TI Lead Time*: 20 WeeksTL1451ACPWG4
Asia	Farnell Asia	11
Europe	Farnell	11
TI Lead Time*: 20 WeeksTL1451ACPWR
None Reported View Distributors
TI Lead Time*: 20 WeeksTL1451ACPWRG4
None Reported View Distributors
TI Lead Time*: 20 WeeksTL1451AQD
Americas	Avnet	87
	Newark	29
	Rochester Electronics	>1k
Asia	Farnell Asia	44
Asia	WPI	75
Worldwide	DigiKey	722
Worldwide	Mouser Electronics	51
TI Lead Time*: 20 WeeksTL1451AQDG4
Worldwide	DigiKey	Available
TI Lead Time*: 6 WeeksTL1451AQDR
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksTL1451AQDRG4
Americas	Avnet	>1k
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
TL1451ACD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACDBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACDBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACDG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACDR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACDRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACN	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
TL1451ACNE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
TL1451ACNSR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACNSRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451ACPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451AQD	TBD	CU NIPDAU	Level-1-220C-UNLIM	View	View
TL1451AQDG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
TL1451AQDR	TBD	CU NIPDAU	Level-1-220C-UNLIM	View	View
TL1451AQDRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	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 TL1451A

Datasheet

Dual Pulse-Width-Modulation Control Circuits (Rev. E) (PDF, 1065 KB)
13 Mar 2002

Application Notes

Understanding Buck-Boost Power Stages in Switchmode Power Supplies (Rev. A) (HTM, 8 KB) 22870 views
28 May 2002 Read Abstract
Understanding Boost Power Stages In Switchmode Power Supplies (HTM, 8 KB) 15237 views
04 Mar 1999 Read Abstract
Understanding Buck Power Stages In Switchmode Power Supplies (HTM, 8 KB) 15940 views
04 Mar 1999 Read Abstract

View Application Notes for DC/DC Controllers (External Switch)

Reference Designs

Description	Part #	Company
Dual Non-Sync Buck, Sync Buck, Negative Flyback with Vin 6 to 15 V	PMP00-062	Texas Instruments
Flyback, LDO, Buck, Sync. Buck Reference Design	PMP009	Texas Instruments
Sync. Buck, Two Boost with Vin 4.5-5.5. Multiple output voltages of 3.3 V, 5 V and 12 V	PMP146	Texas Instruments

Tools & Software

Name	Part #	Company	Tool / Software Type
Dual PWM Control Circuit	TL1451AEVM-166	Texas Instruments	Development Boards/EVMs

Part #	Name	Product Family	Comments
TPS5124	TPS5124 Dual Channel Synchronous Step-Down PWM Controller	NON-ISOLATED SWITCHING DC/DC REGULATORS - DC/DC CONTROLLERS (EXTERNAL SWITCH)	4.5 to 15V two channel DC/DC controller with internal MOSFET Drivers
TPS51124	Dual, Synchronous Step Down Controller for Low Voltage System Power	NON-ISOLATED SWITCHING DC/DC REGULATORS - DC/DC CONTROLLERS (EXTERNAL SWITCH)	4.5 to 28V two channel DC/DC controller with internal MOSFET Drivers
Customers Who Evaluated This Product Also Evaluated...
TPS40200	Wide Input Non-Synchronous Buck DC/DC Controller	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TL5001	PWM Controller with Wide Input Range	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.

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TL1451A Status: ACTIVE

Dual Channel Controller with Wide Input Voltage Range

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