TL3842 Status: ACTIVE

Current-Mode PWM Controller

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Datasheet

Current-Mode PWM Controller (Rev. G) (tl3842.pdf, 532 KB)
28 Feb 2008 Download

	TL3842	TL3843	TL3844	TL3845
Topology	Boost, Flyback, Forward	Boost, Flyback, Forward	Boost, Flyback, Forward	Boost, Flyback, Forward
Control Method	Current	Current	Current	Current
Duty Cycle(Max)(%)	100	100	50	50
PWM Outputs(#)	1	1	1	1
Frequency(Max)(kHz)	500	500	500	500
UVLO Thresholds On/Off(V)	16/10	8.4/7.6	16/10	8.4/7.6
Pin/Package	14SOIC,8SOIC,8PDIP	14SOIC,8PDIP,8SOIC	14SOIC,8PDIP,8SOIC	14SOIC,8PDIP,8SOIC
	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory

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BQ29330: Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE

Product Information

Features

Optimized for Off-Line and dc-to-dc Converters
Low Start-Up Current (<1 mA)
Automatic Feed-Forward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load-Response Characteristics
Undervoltage Lockout With Hysteresis
Double-Pulse Suppression
High-Current Totem-Pole Output
Internally Trimmed Bandgap Reference
500-kHz Operation
Error Amplifier With Low Output Resistance
Designed to Be Interchangeable With UC2842 and UC3842 Series

Description

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges. Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TLx842 and TLx844 devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843 and TLx845 devices are 8.4 V (on) and 7.6 V (off). The TLx842 and TLx843 devices can operate to duty cycles approaching 100%. A duty-cycle range of 0 to 50% is obtained by the TLx844 and TLx845 by the addition of an internal toggle flip-flop, which blanks the output off every other clock cycle.

The TL284x-series devices are characterized for operation from –40°C to 85°C. The TL384x devices are characterized for operation from 0° to 70°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
TL3842D	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	50 \| TUBE	Purchase Samples
TL3842D-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Purchase Samples
TL3842DE4	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	50 \| TUBE	Purchase Samples
TL3842DE4-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Purchase Samples
TL3842DG4	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	50 \| TUBE	Purchase Samples
TL3842DG4-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Purchase Samples
TL3842DR	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	2500 \| LARGE T&R	Purchase Samples
TL3842DR-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
TL3842DRE4	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	2500 \| LARGE T&R	Purchase Samples
TL3842DRE4-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
TL3842DRG4	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 14	View	2500 \| LARGE T&R	Purchase Samples
TL3842DRG4-8	ACTIVE	0 to 70	0.40 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
TL3842P	ACTIVE	0 to 70	0.40 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE	Contact TI Distributor or Sales Office
TL3842PE4	ACTIVE	0 to 70	0.40 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE	Contact TI Distributor or Sales Office

* 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
TL3842D	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2900*	>10k \| 17 Dec	4 Weeks	Americas	Arrow	999
	2900*		4 Weeks	Americas	Rochester Electronics	>1k
TL3842D-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 4 Nov	4 Weeks	Americas	Rochester Electronics	>1k
	0*		4 Weeks	Europe	Avnet-SILICA	900
TL3842DE4	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2900*	>10k \| 17 Dec	4 Weeks	None Reported View Distributors
TL3842DE4-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 4 Nov	4 Weeks	None Reported View Distributors
TL3842DG4	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	2900*	>10k \| 17 Dec	4 Weeks	None Reported View Distributors
TL3842DG4-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 4 Nov	4 Weeks	None Reported View Distributors
TL3842DR	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	890 \| 17 Oct	7 Weeks	Americas	Avnet	>1k
		>10k \| 17 Dec			Mouser Electronics	>1k
					Rochester Electronics	541
				Asia	WPI	>1k
TL3842DR-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	6501 \| 27 Oct	4 Weeks	Americas	DigiKey	142
		>10k \| 6 Nov		Americas	Rochester Electronics	>1k
				Asia	WPI	>1k
TL3842DRE4	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	890 \| 17 Oct	7 Weeks	None Reported View Distributors
	0*	>10k \| 17 Dec	7 Weeks
TL3842DRE4-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	6501 \| 27 Oct	4 Weeks	None Reported View Distributors
	0*	>10k \| 6 Nov	4 Weeks
TL3842DRG4	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	890 \| 17 Oct	7 Weeks	None Reported View Distributors
	0*	>10k \| 17 Dec	7 Weeks
TL3842DRG4-8	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	6501 \| 27 Oct	4 Weeks	None Reported View Distributors
	0*	>10k \| 6 Nov	4 Weeks
TL3842P	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Oct	4 Weeks	Americas	Arrow	450
					DigiKey	17
					Mouser Electronics	795
					Newark	>1k
					Rochester Electronics	>1k
				Asia	WPI	574
				Europe	EBV Elektronik	600
				Europe	Farnell	>1k
TL3842PE4	As of 8:22 AM GMT, 15 Oct 2008			As of 8:22 AM GMT, 15 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 28 Oct	4 Weeks	None Reported View Distributors
View all Distributors

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** 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
TL3842D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842D-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DE4-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DG4-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DR-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DRE4-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842DRG4-8	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TL3842P	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
TL3842PE4	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

Datasheets

Current-Mode PWM Controller (Rev. G) (tl3842.pdf, 532 KB)
28 Feb 2008 Download

Application Notes

Understanding Buck-Boost Power Stages in Switchmode Power Supplies (Rev. A) (slva059a.htm, 8 KB)
28 May 2002 Abstract
UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers (slua257.htm, 8 KB)
07 Feb 2002 Abstract
Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (sloa044.htm, 8 KB)
23 Mar 2000 Abstract
DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 (slua084.htm, 8 KB)
05 Sep 1999 Abstract
DN-65 Considerations in Powering BiCMOS ICs (slua081.htm, 8 KB)
05 Sep 1999 Abstract
U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control (slua143.htm, 9 KB)
05 Sep 1999 Abstract
DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode (slua119.htm, 8 KB)
05 Sep 1999 Abstract
U-111, Practical Considerations in Current Mode Power Supplies (slua110.htm, 8 KB)
05 Sep 1999 Abstract
DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty (slua173.htm, 8 KB)
05 Sep 1999 Abstract
DN-30 Programmable Electronic Circuit Breaker (slua166.htm, 8 KB)
05 Sep 1999 Abstract
DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection (slua165.htm, 8 KB)
05 Sep 1999 Abstract
DN-27 UC1842/UC1842A Family - Summary of Functional Differences (slua163.htm, 8 KB)
05 Sep 1999 Abstract
DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit (slua162.htm, 8 KB)
05 Sep 1999 Abstract
DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers (slua213.htm, 8 KB)
05 Sep 1999 Abstract
Understanding Boost Power Stages In Switchmode Power Supplies (slva061.htm, 8 KB)
04 Mar 1999 Abstract
Understanding Buck Power Stages In Switchmode Power Supplies (slva057.htm, 8 KB)
04 Mar 1999 Abstract

View Application Notes for PWM Power Supply Controllers

User Guides

View User Guides for PWM Power Supply Controllers

More Literature

Standard Linear Products Cross-Reference (Rev. D) (slyt017d.pdf, 1169 KB)
05 May 2006 Download

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UCC2895	BiCMOS Advanced Phase Shift Resonant Controller	TI customers also evaluated this product.
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TL3842 Status: ACTIVE

Current-Mode PWM Controller

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