LM27964SQ-C/NOPB

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Texas Instruments

IC LED DRV RGLTR I2C 24WQFN

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LM27964SQ-C/NOPB

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Texas Instruments

IC LED DRV RGLTR I2C 24WQFN

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Description Specifications Series Pricing CAD Documents

Description

General part information

LM27964 Series

The LM27964 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. The LM27964 can drive up to 6 LEDs in parallel along with multiple keypad LEDs, with a total output current up to 180mA. Regulated internal current sources deliver excellent current 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 and the second group (2 LEDs) can be used to backlight a secondary display. A single Keypad LED driver can power up to 16 keypad LEDs with a current of 5mA each. The LM27964 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

The LM27964 works off an extended Li-Ion input voltage range (2.7V to 5.5V). The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in Pass-Mode. The proper gain for maintaining current regulation is chosen, based on LED forward voltage, so that efficiency is maximized over the input voltage range.

Technical Specifications

Parameters and characteristics for this part

Specification	LM27964SQ-C/NOPB

Applications	Backlight
Current - Output / Channel (Channel 1)	30 mA
Current - Output / Channel (Channel 2)	80 mA
Dimming	I2C
Frequency	700 kHz
Internal Switch(s)	Yes
Mounting Type	Surface Mount
Number of Outputs	7
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-30 °C
Package / Case	24-WFQFN Exposed Pad
Package Length	4 mm
Package Name	24-WQFN
Package Width	4 mm
Topology	Switched Capacitor (Charge Pump)
Type	DC DC Regulator
Voltage - Output (Max)	4 V
Voltage - Output (Min)	2 V
Voltage - Supply (Max)	5.5 V
Voltage - Supply (Min)	2.7 V

LM27964 Series

White LED driver System with I2C Compatible brightness control

Part	Package Length	Package Name	Package Width	Mounting Type	Dimming	Applications	Voltage - Supply (Max)	Voltage - Output (Min)	Voltage - Output (Max)	Number of Outputs	Frequency	Type	Voltage - Supply (Min)	Topology	Package / Case	Operating Temperature (Max)	Operating Temperature (Min)	Internal Switch(s)	Current - Output / Channel (Channel 2)	Current - Output / Channel (Channel 1)
Texas Instruments LM27964SQX-A	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-A	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-C/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-A	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-I/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQX-A/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-I/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-C/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQX-C/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA
Texas Instruments LM27964SQ-A/NOPB	4 mm	24-WQFN	4 mm	Surface Mount	I2C	Backlight	5.5 V	2 V	4 V	7	700 kHz	DC DC Regulator	2.7 V	Switched Capacitor (Charge Pump)	24-WFQFN Exposed Pad	85 °C	-30 °C	Yes	80 mA	30 mA

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