Texas Instruments LM27951SD/NOPB
- Part Number:
- LM27951SD/NOPB
- Manufacturer:
- Texas Instruments
- Ventron No:
- 3257510-LM27951SD/NOPB
- Description:
- White LED adaptive 1.5X/1X switched capacitor current driver with 2.8V-5.5V input voltage range
- Datasheet:
- lm27951
Description
The LM27951 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED. Its 4 tightly regulated current sources ensure excellent LED current and brightness matching. LED drive current is programmed by an external sense resistor. The LM27951 operates over an input voltage range from 2.8V to 5.5V and requires only four low-cost ceramic capacitors.
The LM27951 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in a gain of 1. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage requirements.
The LM27951 uses constant frequency pre-regulation to minimize conducted noise on the input. It has a fixed 750kHz switching frequency optimized for portable applications. The LM27951 consumes less than 1μA of supply current when shut down.
The LM27951 is available in a 14-pin No-Pullback WSON package.
Features
Drives up to 4 LEDs with up to 30mA each
Regulated current sources with 0.2% (typ.) matching
3/2x, 1x Gain transition based on LED VF
Peak Efficiency Over 85%
Input Voltage Range: 2.8V to 5.5V
PWM Brightness Control
Very Small Solution Size - NO INDUCTOR
Fixed 750kHz Switching Frequency
<1μA Shutdown Current
14-pin WSON Package: 4.0mm X 3.0mm X 0.8mm
Applications
White LED Display Backlights
White LED Keypad Backlights
General Purpose LED Lighting
The LM27951 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED. Its 4 tightly regulated current sources ensure excellent LED current and brightness matching. LED drive current is programmed by an external sense resistor. The LM27951 operates over an input voltage range from 2.8V to 5.5V and requires only four low-cost ceramic capacitors.
The LM27951 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in a gain of 1. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage requirements.
The LM27951 uses constant frequency pre-regulation to minimize conducted noise on the input. It has a fixed 750kHz switching frequency optimized for portable applications. The LM27951 consumes less than 1μA of supply current when shut down.
The LM27951 is available in a 14-pin No-Pullback WSON package.
Features
Drives up to 4 LEDs with up to 30mA each
Regulated current sources with 0.2% (typ.) matching
3/2x, 1x Gain transition based on LED VF
Peak Efficiency Over 85%
Input Voltage Range: 2.8V to 5.5V
PWM Brightness Control
Very Small Solution Size - NO INDUCTOR
Fixed 750kHz Switching Frequency
<1μA Shutdown Current
14-pin WSON Package: 4.0mm X 3.0mm X 0.8mm
Applications
White LED Display Backlights
White LED Keypad Backlights
General Purpose LED Lighting
Texas Instruments LM27951SD/NOPB technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM27951SD/NOPB.
- Factory Lead Time6 Weeks
- Lifecycle StatusACTIVE (Last Updated: 3 days ago)
- Contact PlatingTin
- MountSurface Mount
- Mounting TypeSurface Mount
- Package / Case14-WFDFN Exposed Pad
- Number of Pins14
- Operating Temperature-40°C~85°C TA
- PackagingTape & Reel (TR)
- JESD-609 Codee3
- Pbfree Codeyes
- Part StatusActive
- Moisture Sensitivity Level (MSL)1 (Unlimited)
- Number of Terminations14
- ECCN CodeEAR99
- ApplicationsBacklight
- SubcategoryDisplay Drivers
- TechnologyCMOS
- Terminal PositionDUAL
- Peak Reflow Temperature (Cel)260
- Number of Functions1
- Supply Voltage3.6V
- Terminal Pitch0.5mm
- Base Part NumberLM27951
- Power Supplies3.3/5V
- Max Supply Voltage5.5V
- Min Supply Voltage2.8V
- Nominal Supply Current1.5mA
- Output Current120mA
- Max Supply Current1.9mA
- Quiescent Current1.5mA
- Voltage - Output2.5V~3.9V
- TopologySwitched Capacitor (Charge Pump)
- Min Input Voltage2.8V
- Max Input Voltage5.5V
- Output CharacteristicsCONSTANT-CURRENT
- Input CharacteristicsSTANDARD
- Current - Output / Channel30mA
- Internal Switch(s)Yes
- DimmingPWM
- Number of Segments4
- Switching Frequency750kHz
- Multiplexed Display CapabilityNO
- TouchscreenCapacitive
- Height800μm
- Length4mm
- Width3mm
- Thickness800μm
- Radiation HardeningNo
- REACH SVHCNo SVHC
- RoHS StatusROHS3 Compliant
- Lead FreeLead Free
Popular Search Part Number
Related Keywords
Search Tags
Latest News
-
11 December 2023
CR2032 vs CR2450: What is the Difference?
Ⅰ. What is a button battery?Ⅱ. CR2032 vs CR2450: OverviewⅢ. CR2032 vs CR2450: Symbol and footprintⅣ. CR2032 vs CR2450: FeaturesⅤ. CR2032 vs CR2450: Technical parametersⅥ. CR2450 vs CR2032:... -
12 December 2023
What is 74LS74 Dual D Flip Flop?
Ⅰ. What is a D flip-flop?Ⅱ. Overview of 74LS74Ⅲ. Pin configuration and functions of 74LS74Ⅳ. What are the features of 74LS74?Ⅴ. Structure and working principle of 74LS74Ⅵ. Technical... -
12 December 2023
TM1650 LED Driver IC Features, Working Principle, Applications, Usage and More
Ⅰ. Overview of TM1650Ⅱ. Symbol, footprint and pin configuration of TM1650Ⅲ. Features of TM1650 LED driverⅣ. Technical parameters of TM1650 LED driverⅤ. How does the TM1650 LED driver... -
13 December 2023
74HC00 Pin Configuration, Replacements, Applications and Other Details
Ⅰ. Overview of 74HC00Ⅱ. Pin configuration and functions of 74HC00Ⅲ. What are the features of 74HC00?Ⅳ. Technical parameters of 74HC00Ⅴ. Working principle of 74HC00Ⅵ. Absolute maximum ratings of...
Help you to save your cost and time.
Reliable package for your goods.
Fast Reliable Delivery to save time.
Quality premium after-sale service.