LM2796 Selling Leads, Price trend, LM2796 DataSheet download, circuit diagram from SeekIC.com

Features: ·Drives up to 7 LEDs with up to 20mA each·LEDs controlled in 2 Distinct Groups, for Backlighting 2 Displays (main LCD and sub-LCD)·Excellent Current and Brightness Matching·High-Efficiency 3/2x Charge Pump·Extended Li-Ion Input: 2.7V to 5.5V·PWM Brightness Control: 100Hz - 1kHz·18-bump T...

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SeekIC No. : 004395069 Detail

LM2796: Features: ·Drives up to 7 LEDs with up to 20mA each·LEDs controlled in 2 Distinct Groups, for Backlighting 2 Displays (main LCD and sub-LCD)·Excellent Current and Brightness Matching·High-Efficiency...

LM2796 Data Sheet

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Part Number:: LM2796
Supply Ability:: 5000

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1~5000

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Negotiable

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15 Days

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Upload time: 2024/12/21

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Product Details

Description

Features:

·Drives up to 7 LEDs with up to 20mA each
·LEDs controlled in 2 Distinct Groups, for Backlighting 2 Displays (main LCD and sub-LCD)
·Excellent Current and Brightness Matching
·High-Efficiency 3/2x Charge Pump
·Extended Li-Ion Input: 2.7V to 5.5V
·PWM Brightness Control: 100Hz - 1kHz
·18-bump Thin Micro SMD Package: (2.1mm x 2.4mm x 0.6mm)

Application

·Mobile Phone Display Lighting
·Mobile Phone Keypad Lighting
·PDAs
·General LED Lighting

Specifications

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN pin voltage........................................ -0.3V to 7.1V
EN, ENA, ENB pin voltages .............-0.3V to (VIN+0.3V)
........................w/ 5.6V max
Continuous Power Dissipation
(Note 3)
Internally Limited
Junction Temperature (TJ-MAX) ..........................150oC
Storage Temperature Range ................-65 to +150
Maximum Lead Temperature
(Soldering, 10 sec.) ..............................................265
ESD Rating (Note 4)Human Body..........................2.0kV
Model:....................................................................200V
Machine Model

Regulated LEDs	7
Total LED Current	140 mA
Current Matching	1%
Boost Type	Switched Capacitor 1.5x
Switching Frequency	500 kHz
Efficiency (peak)	80 %
Input Min Voltage	2.7 Volt
Input Max Voltage	5.5 Volt
Boost Voltage	Unregulated
LED Configuration	Parallel
Supply Current	3.5 mA
Switching Type	Fixed Freq
Special Features	LEDs controlled in 2 groups: 3 and 4 LEDs; softstart
PWM BrightCtrl	Yes
Analog-V BrightCtrl	No
Ambient Light Compensation	No
RGB-LED	No
Temperature Min	-30 deg C
Temperature Max	85 deg C
RegType	WhiteLED Driver
PowerWise	Yes
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Description

The LM2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive up to 7 LEDs in parallel with up to 20mA through each LED. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED-driver current sources are split into two independently controlled groups. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (3 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulsewidth modulated (PWM) digital signals.

The LM2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a highefficiency 3/2x-gain charge pump.

The LM2796 is available in National's chip-scale 18-bump micro SMD package.

LM2796

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