LM2794

Name: LM2794
Brand: TI
SKU: LM2794
Price: 0.683 USD

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Stromgeregelte LED-Stromversorgung mit geschaltetem Kondensator und Analog- und PWM- Helligkeitssteu

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Datenblatt

document-pdfAcrobat LM2794,LM2795 Current Reg Switched Cap LED Sup w/Analog & PWM Brightness Control datasheet (Rev. L) (Englisch)

LM2794

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Datenblatt

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Produktdetails

Number of channels

4

Vin (min) (V)

2.7

Vin (max) (V)

5.5

Vout (min) (V)

2.7

Vout (max) (V)

5.5

Type

Capacitive

Switching frequency (max) (kHz)

675

Duty cycle (max) (%)

100

LED current per channel (mA)

20

Peak efficiency (%)

80

Topology

Boost

Features

Analog/PWM mixed dimming

Operating temperature range (°C)

-30 to 85

Rating

Catalog

Number of channels

4

Vin (min) (V)

2.7

Vin (max) (V)

5.5

Vout (min) (V)

2.7

Vout (max) (V)

5.5

Type

Capacitive

Switching frequency (max) (kHz)

675

Duty cycle (max) (%)

100

LED current per channel (mA)

20

Peak efficiency (%)

80

Topology

Boost

Features

Analog/PWM mixed dimming

Operating temperature range (°C)

-30 to 85

Rating

Catalog

DSBGA (YPA)

14

5.5845 mm² 2.482 x 2.25

Regulated Current Sources with ±0.5% Matching between any Two Outputs
High Efficiency 3/2 Boost Function
Drives One, Two, Three or four White LEDs
2.7V to 5.5V Input Voltage
Up to 80mA Output Current
Analog Brightness Control
Active-Low or High Shutdown Input ('94/95)
Very Small Solution Size and no Inductor
2.3µA (typ.) Shutdown Current
325kHz Switching Frequency (min.)
Constant Frequency Generates Predictable Noise Spectrum
Thin DSBGA Package: 2.08mm X 2.403mm X 0.600mm High

All trademarks are the property of their respective owners.

Regulated Current Sources with ±0.5% Matching between any Two Outputs
High Efficiency 3/2 Boost Function
Drives One, Two, Three or four White LEDs
2.7V to 5.5V Input Voltage
Up to 80mA Output Current
Analog Brightness Control
Active-Low or High Shutdown Input ('94/95)
Very Small Solution Size and no Inductor
2.3µA (typ.) Shutdown Current
325kHz Switching Frequency (min.)
Constant Frequency Generates Predictable Noise Spectrum
Thin DSBGA Package: 2.08mm X 2.403mm X 0.600mm High

All trademarks are the property of their respective owners.

The LM2794/95 is a fractional CMOS charge-pump that provides four regulated current sources. It accepts an input voltage range from 2.7V to 5.5V and maintains a constant current determined by an external sense resistor.

The LM2794/5 delivers up to 80mA of load current to accommodate four White LEDs. The switching frequency is 325kHz. (min.) to keep the conducted noise spectrum away from sensitive frequencies within portable RF devices.

Brightness can be controlled by both linear and PWM techniques. A voltage between 0V and 3.0V may be applied to the BRGT pin to linearly vary the LED current. Alternatively, a PWM signal can be applied to the SD pin to vary the perceived brightness of the LED. The SD pin reduces the operating current to 2.3µA (typ.) The LM2794 is shut down when the SD pin is low, and the LM2795 is shut down when the SD pin is high.

The LM2794/95 is available in a DSBGA CSP package.

The LM2794/95 is a fractional CMOS charge-pump that provides four regulated current sources. It accepts an input voltage range from 2.7V to 5.5V and maintains a constant current determined by an external sense resistor.

The LM2794/5 delivers up to 80mA of load current to accommodate four White LEDs. The switching frequency is 325kHz. (min.) to keep the conducted noise spectrum away from sensitive frequencies within portable RF devices.

Brightness can be controlled by both linear and PWM techniques. A voltage between 0V and 3.0V may be applied to the BRGT pin to linearly vary the LED current. Alternatively, a PWM signal can be applied to the SD pin to vary the perceived brightness of the LED. The SD pin reduces the operating current to 2.3µA (typ.) The LM2794 is shut down when the SD pin is low, and the LM2795 is shut down when the SD pin is high.

The LM2794/95 is available in a DSBGA CSP package.

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Alle anzeigen 4

	Typ	Titel	Datum
*	Data sheet	LM2794,LM2795 Current Reg Switched Cap LED Sup w/Analog & PWM Brightness Control datasheet (Rev. L)	02 Mai 2013
	White paper	Common LED Functions and LED Driver Design Considerations	21 Sep 2020
	EVM User's guide	AN-1218 LM2791/2/4/5 Evaluation Board (Rev. B)	30 Apr 2013
	Application note	Switched Cap Circuits Provide Efficient and Functional White LED Drive (Rev. B)	30 Apr 2013

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LM2794

Stromgeregelte LED-Stromversorgung mit geschaltetem Kondensator und Analog- und PWM- Helligkeitssteu

LM2794

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