LM27965SQX/NOPB
ActiveDUAL DISPLAY WHITE LED DRIVER WITH I2C COMPATIBLE BRIGHTNESS CONTROL
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LM27965SQX/NOPB
ActiveDUAL DISPLAY WHITE LED DRIVER WITH I2C COMPATIBLE BRIGHTNESS CONTROL
Technical Specifications
Parameters and characteristics for this part
| Specification | LM27965SQX/NOPB |
|---|---|
| Applications | Lighting, Backlight |
| Current - Output / Channel | 30 mA |
| Dimming | I2C |
| Frequency | 1.27 MHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 9 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x5) |
| 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 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.95 | |
| Digi-Reel® | 1 | $ 2.95 | ||
| Tape & Reel (TR) | 4500 | $ 1.35 | ||
| Texas Instruments | LARGE T&R | 1 | $ 2.00 | |
| 100 | $ 1.75 | |||
| 250 | $ 1.23 | |||
| 1000 | $ 0.99 | |||
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.
Documents
Technical documentation and resources
