LM27965SQ-M/NOPB

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Texas Instruments

DUAL DISPLAY WHITE LED DRIVER WITH I2C COMPATIBLE BRIGHTNESS CONTROL

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LM27965SQ-M/NOPB

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Texas Instruments

DUAL DISPLAY WHITE LED DRIVER WITH I2C COMPATIBLE BRIGHTNESS CONTROL

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Description Specifications Series Pricing CAD Documents

Description

General part information

LM27965 Series

The LM27965 is a highly integrated charge-pump-based dual-display LED driver. The device can drive up to 9 LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching in all LEDs.

The LED driver current sinks are split into three independently controlled groups. The primary group can beconfigurabled with 4 or 5 LEDs, for backlighting a larger main display and the second group can be configured with 2 or 3 LEDs, for backlighing a smaller secondary display. An additional, independently controlled led driver is provided for driving an indicator or general purpose LED. The LM27965 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs.

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	LM27965SQ-M/NOPB

Applications	Backlight
Current - Output / Channel	30 mA
Dimming	I2C
Frequency	1.27 MHz
Internal Switch(s)	Yes
Mounting Type	Surface Mount
Number of Outputs	9
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

LM27965 Series

Part	Voltage - Output (Min)	Voltage - Output (Max)	Applications	Internal Switch(s)	Type	Topology	Frequency	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Supply (Max)	Current - Output / Channel	Voltage - Supply (Min)	Number of Outputs	Dimming	Mounting Type	Package Length	Package Name	Package Width	Package / Case	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Output Type	Non-Isolated Output Count	Total Output Count	Voltage - Output	Contents	Utilized IC / Part
Texas Instruments LM27965SQ	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQ	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQ/NOPB	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQ-M/NOPB	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQX/NOPB	2 V	4 V	Backlight Lighting	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	5 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQ-M/NOPB	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQEV											20 mA									2.7 V	5.5 V	Non-Isolated	9	9	4 V	Board	LM27965
Texas Instruments LM27965SQX	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad
Texas Instruments LM27965SQ-MX/NOPB	2 V	4 V	Backlight	Yes	DC DC Regulator	Switched Capacitor (Charge Pump)	1.27 MHz	85 °C	-30 °C	5.5 V	30 mA	2.7 V	9	I2C	Surface Mount	4 mm	24-WQFN	4 mm	24-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Datasheet

Common LED Functions and LED Driver Design Considerations

Optimizing Efficiency in White LED Backlight Applications

LM27965 Dual Display White LED Driver w/I2C Compatible Brightness Control (Rev. B)