TPS61042 Status: ACTIVE

30-V, 500-mA Switch Boost Converter in QFN-8 for White LED Applications

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Datasheet

Constant Current LED Driver (Rev. C) (tps61042.pdf, 741 KB)
27 Mar 2007 Download

	TPS61040	TPS61041	TPS61042	TPS61043	TPS61045
Topology	Boost	Boost	Boost	Boost	Boost
Type	Inductive	Inductive	Inductive	Inductive	Inductive
Vin(Min)(V)	1.8	1.8	1.8	1.8	1.8
Vin(Max)(V)	6	6	6	6	6
Switch Current Limit(Typ)(A)	0.4	0.25	0.5	0.5	0.45
Output Voltage(Max)(V)	28	28	28	16.9	28
Switching Frequency(Max)(kHz)	1000	1000	1000	1000	1000
LED(#)	6	4	6	4	1 OLED or 6
LED Configuration	Series	Series	Series	Series	Series
Over-Voltage Protection(Min)(V)	No	No	28	17	No
Peak Efficiency(%)	86	85	85	85
Iq(Typ)(mA)	0.028	0.028	0.038	0.038	0.04
Operating Temp Range(Celsius)	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Pin/Package	5SOT-23,6SON	5SOT-23,6SON	8SON	8SON	8SON
Iout(Max)(A)	0.09	0.05	0.03	0.03	0.02
Regulated Outputs(#)		1	1	1	1
	Samples	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

TPS61041: 28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications
TPS61040: 28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications
TPS61043: TPS61043: Constant Current LED Driver
TPS62200: Adjustable, 300-mA, 95% Efficient Step-Down Converter in SOT-23
TPS40200: Wide Input Nonsynchronous Buck DC/DC Controller
TPS65120: 5V/20mA(I/O), 4-CH high-accuracy Multi-Converter w/ 3.3V LDO for LCD Bias, 16 QFN

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Product Information

Features

Current Source With Overvoltage Protection
Input Voltage Range . . 1.8 V to 6 V
Internal 30 V Switch
Up to 85% Efficiency
Precise Brightness Control Using PWM Signal or Analog Signal
Switching Frequency . . Up to 1 MHz
Internal Power MOSFET Switch . . 500 mA
Operates With Small Output Capacitors Down to 100 nF
Disconnects LEDs During Shutdown
No Load Quiescent Current . . 38 µA Typ
Shutdown Current . . 0.1 µA Typ
Available in a Small 3 mm × 3 mm QFN Package
APPLICATIONS
- White LED Supply for Backlight/Sidelight Displays
  - PDA, Pocket PC, Smart Phones
  - Handheld Devices
  - Cellular Phones

Description

The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (R_S) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor R_S to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100 Hz to 50 kHz to the control pin (CTRL). To allow higher flexibility, the device can be configured where the brightness can be controlled by an analog signal as well. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground. For maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device in case of a high impedance output (e.g. faulty LED).

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	Samples
TPS61042DRBR	ACTIVE	-40 to 85	0.95 \| 1ku	SON (DRB) \| 8	View	3000 \| LARGE T&R
TPS61042DRBRG4	ACTIVE	-40 to 85	0.95 \| 1ku	SON (DRB) \| 8	View	3000 \| LARGE T&R
TPS61042DRBT	ACTIVE		1.00 \| 1ku	SON (DRB) \| 8	View	250 \| SMALL T&R	Purchase Samples
TPS61042DRBTG4	ACTIVE		1.00 \| 1ku	SON (DRB) \| 8	View	250 \| SMALL 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

	TI Inventory Status			Reported Distributor Inventory
TPS61042DRBR	As of 8:01 AM GMT, 10 Oct 2008			As of 8:01 AM GMT, 10 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 2 Feb	6 Weeks	Americas	Arrow	>1k
					DigiKey	>1k
					Mouser Electronics	>1k
					Newark	>1k
					Rochester Electronics	>1k
				Asia	WPI	>1k
TPS61042DRBRG4	As of 8:01 AM GMT, 10 Oct 2008			As of 8:01 AM GMT, 10 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 2 Feb	6 Weeks	Americas	Rochester Electronics	>1k
				Asia	WPI	>1k
				Europe	Farnell	>1k
TPS61042DRBT	As of 8:01 AM GMT, 10 Oct 2008			As of 8:01 AM GMT, 10 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 22 Dec	6 Weeks	Americas	Mouser Electronics	496
				Americas	Rochester Electronics	>1k
				Europe	Spoerle	250
TPS61042DRBTG4	As of 8:01 AM GMT, 10 Oct 2008			As of 8:01 AM GMT, 10 Oct 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 22 Dec	6 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
TPS61042DRBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61042DRBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61042DRBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61042DRBTG4	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

Datasheets

Constant Current LED Driver (Rev. C) (tps61042.pdf, 741 KB)
27 Mar 2007 Download

Application Notes

Optimizing Transient Response of Internally Compensated DC-DC Converters (slva289.htm, 8 KB)
28 Jan 2008 Abstract
QFN/SON PCB Attachment Application Report (Rev. A) (slua271a.htm, 8 KB)
25 Jul 2007 Abstract
White Light LED Driver With Gradual Dimming (Rev. A) (slva122a.htm, 8 KB)
10 Jan 2007 Abstract
Operating the TPS61042 from Two Li-Ion and Input Voltages Higher than 6V (slva244.htm, 8 KB)
17 Jul 2006 Abstract
Performing Accurate PFM Mode Efficiency Measurements (slva236.htm, 8 KB)
18 Apr 2006 Abstract
Using the TPS61040 in High Voltage Applications (slva209.htm, 8 KB)
16 May 2005 Abstract
TPS61042 White Light LED Driver Boost Converter (Rev. A) (slva125a.htm, 8 KB)
09 Jun 2003 Abstract
TPS61040 Inverter Design (Rev. A) (slva008a.htm, 8 KB)
09 Jun 2003 Abstract
Single Cell TPS61041 LED Driver (slva136.htm, 8 KB)
09 Jun 2003 Abstract
TPS61042 Dual Li-Ion and Higher Input Voltages (slva131.htm, 8 KB)
13 Mar 2003 Abstract
High Voltage Power Supply Using the TPS61040 (slua272.htm, 8 KB)
09 Jul 2002 Abstract

View Application Notes for White LED Drivers

User Guides

TPS61042EVM-226 White Light LED Bias Supply EVM (sllu053.htm, 8 KB)
13 Sep 2002 Abstract

White Papers

White LED Power Supply Design Techniques (slva130.htm, 9 KB)
18 Feb 2003 Abstract

Tools & Software

Name	Part #	Company	Tool / Software Type
TPS61042 EVM for Constant-Current White LED Supply w/ PWM Brightness Ctrl	TPS61042EVM-226	Texas Instruments	Development Boards/EVMs

Alternative Products - Are similar to TPS61042
Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Comments
TPS61041	28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications	TI customers also evaluated this product.
TPS61040	28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications	TI customers also evaluated this product.
TPS61043	TPS61043: Constant Current LED Driver	TI customers also evaluated this product.
TPS61045	28-V, 85% Efficient Boost Converter in QFN-8 for LCD Applications	TI customers also evaluated this product.
TPS61160	White LED Driver with Digital and PWM Brightness Control in 2mm x 2mm Package	TI customers also evaluated this product.

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