TPS61043 Status: ACTIVE

TPS61043: Constant Current LED Driver

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Datasheet

TPS61043: Constant Current LED Driver (Rev. A) (PDF 1070 KB)
10 Dec 2003

	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)			28	17
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	1
	Samples	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory	Inventory

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TPS61041: 28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications
TPS61086: 18.5V PFM/PWM Step-Up DC-DC Converter with 2.0 A Switch
TPS61085: 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter with Forced PWM Mode
TL4242: Adjustable LED Driver

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Product Information

Features

Current Source with 18 V Overvoltage Protection
Powers Up to 4 LEDs in Series
Input Voltage Range . . 1.8 V to 6.0 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 . . 400 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 Display Backlight/Sidelight in
  - PDA, Pocket PC, Smart Phones
  - Handheld Devices
  - Cellular Phones

Description

The TPS61043 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, as described in the application information section. To avoid possible leakage currents through the LEDs during shutdown, the control pin (CTRL) disables the device and disconnects the LEDs from ground.

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	Samples
TPS61043DRBR	ACTIVE	-40 to 85	0.75 \| 1ku	SON (DRB) \| 8	View	3000 \| LARGE T&R
TPS61043DRBRG4	ACTIVE	-40 to 85	0.75 \| 1ku	SON (DRB) \| 8	View	3000 \| LARGE T&R
TPS61043DRBT	ACTIVE	-40 to 85	0.80 \| 1ku	SON (DRB) \| 8	View	250 \| SMALL T&R	Purchase Samples
TPS61043DRBTG4	ACTIVE	-40 to 85	0.80 \| 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

Reported Distributor Inventory as of 10:10 AM GMT, 20 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 16 WeeksTPS61043DRBR
Americas	Rochester Electronics	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 16 WeeksTPS61043DRBRG4
Americas	Rochester Electronics	>1k
TI Lead Time*: 20 WeeksTPS61043DRBT
Americas	Avnet	250
Americas	Rochester Electronics	>1k
Europe	Arrow Southern Europe	250
Worldwide	Mouser Electronics	485
TI Lead Time*: 20 WeeksTPS61043DRBTG4
Americas	Avnet	250
Worldwide	Mouser Electronics	77
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
TPS61043DRBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61043DRBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61043DRBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61043DRBTG4	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 TPS61043

Datasheet

TPS61043: Constant Current LED Driver (Rev. A) (PDF, 1070 KB)
10 Dec 2003

Application Notes

Performing Accurate PFM Mode Efficiency Measurements (HTM, 8 KB) 3726 views
18 Apr 2006 Read Abstract
Optimizing Transient Response of Internally Compensated DC-DC Converters (HTM, 8 KB) 4277 views
28 Jan 2008 Read Abstract
Solutions for LED Driver Overvoltage Protection (HTM, 8 KB) 265 views
08 Jun 2009 Read Abstract
Extending Soft Start Time in TPS6107x Family of Boost (HTM, 8 KB) 2663 views
07 Aug 2008 Read Abstract

View Application Notes for White LED Drivers

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Part #	Name	Product Family	Comments
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TPS61041	28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications	LIGHTING AND DISPLAY SOLUTIONS-WHITE LED DRIVERS	TI customers also evaluated this product.
TPS61040	28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications	LIGHTING AND DISPLAY SOLUTIONS-WHITE LED DRIVERS	TI customers also evaluated this product.
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TPS61500	High Brightness LED Driver with Integrated 3-A, 40-V Power Switch	LIGHTING AND DISPLAY SOLUTIONS-WHITE LED DRIVERS	TI customers also evaluated this product.
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TL4242	Adjustable LED Driver	LIGHTING AND DISPLAY SOLUTIONS-LED DRIVERS	TI customers also evaluated this product.
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TPS61043 Status: ACTIVE

TPS61043: Constant Current LED Driver

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