LM27964SQ-C/NOPB ,White LED Driver System with I2C Compatible Brightness Control 24-WQFN Electrical CharacteristicsLimits in standard typeface are for T = 25°C, and limits in boldface type ..
LM27964SQ-I , White LED Driver System with I2C Compatible Brightness Control
LM27964SQ-I , White LED Driver System with I2C Compatible Brightness Control
LM27964SQX-A , White LED Driver System with I2C Compatible Brightness Control
LM27965SQ , Dual Display White LED Driver with I2C Compatible Brightness Control
LM27965SQ-M/NOPB ,Dual Display White LED Driver with I2C Compatible Brightness Control 24-WQFN CONNECTION DIAGRAM24 Pin WQFN PackageSee Package Number RTW0024A6 5 4 3 2 1 1 2 3 4 5 6724 24 78 23 ..
LM631 , BLUE OVAL LAMP LED
LM6313N ,High Power Operational Amplifierfeatures a 35 MHz small sig- Wide bandwidth 35 MHznalbandwidth,and250V/msslewrate.Acompensationpin ..
LM6321M ,High Speed BufferLM6121/LM6221/LM6321 High Speed BufferMay 1998LM6121/LM6221/LM6321High Speed Buffer
LM6321MX ,High Speed Bufferfeatures of current limit and ther-n LH0002H pin compatiblemal shutdown.n No oscillations with capa ..
LM6321N ,High Speed Bufferfeatures of current limit and ther-n LH0002H pin compatiblemal shutdown.n No oscillations with capa ..
LM6325N ,High Speed BufferGeneral Descriptionn Stable with large capacitive loadsThe LM6125 family of high speed unity gain b ..
LM27964SQ-C/NOPB
White LED Driver System with I2C Compatible Brightness Control
LM27964D1AVIN
GND
RSETA RSETB
ISETBISETA
D2A D3A D4A D2BD1B
MAIN DISPLAY SUB DISPLAY KEYPAD LEDs
DKEY
LM27964
www.ti.com SNOSAL6D –MAY 2005–REVISED MAY 2013
LM27964 White LED Driver System with I2C Compatible Brightness Control
Checkfor Samples: LM27964
1FEATURES APPLICATIONS 87% Peak LED Drive Efficiency • Mobile Phone Display Lighting 0.2% Current Matching between Current Sinks • Mobile Phone Keypad Lighting Drives6 LEDs with upto 30mA per LEDin • PDAs Backlighting
Two Distinct Groups, for Backlighting Two • General LED Lighting
Displays (main LCD and sub LCD) Dedicated Keypad LED Driver with upto 80mA DESCRIPTION Drive Current The LM27964isa charge-pump-based white-LED
driver that is ideal for mobile phone display
• Independent Resistor-Programmable Current backlighting. The LM27964 can driveupto6 LEDsin
Settings parallel along with multiple keypad LEDs, witha total
•I2C Compatible Brightness Control Interface output current up to 180mA. Regulated internal
Adaptive 1×- 3/2× Charge Pump current sources deliver excellent current matchingin
all LEDs.
• Extended Li-Ion Input: 2.7Vto 5.5V Small Low Profile Industry Standard Leadless The LED driver current sources are split into two
independently controlled groups. The primary group
Package, WQFN-24: (4mmx 4mmx 0.8mm) LEDs) can be usedto backlight the main phone
• LM27964SQ-I LED PWM Frequency= 10kHz, display and the second group(2 LEDs) can be used
LM27964SQ-C LED PWM frequency= 23kHz to backlighta secondary display.A single Keypad
LED driver can power upto 16 keypad
current of 5mA each. The LM27964
compatible interface that allows
independently control the brightness
LEDs.
Typical Application Circuit
