LM27951SD Semiconductors - ICs by Texas Instruments

LED DRIVER SW CAP POWERWISE LLP-14

Electronic & Electrical Components>Semiconductors - ICs>Driver & Interface ICs

Status:	Unknown
Series:	-
RoHS:	Unknown

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The LM27951 is a switched capacitor white-LED driver capable of driving up to four LEDs with 30 mA through each LED. Its four 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 2.8 V to 5.5 V 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 750-kHz switching frequency optimized for portable applications. The LM27951 consumes less than 1 µA of supply current when shut down. The LM27951 is available in a 14-pin no-pullback WSON package.

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Specifications

Device Topology	Charge Pump
No. of Outputs	4Outputs
Output Current	30mA
Output Voltage	3.9V
Driver Case Style	LLP
No. of Pins	14Pins
Input Voltage Min	2.8V
Input Voltage Max	5.5V
Switching Frequency	750kHz
Operating Temperature Min	-40°C
Operating Temperature Max	85°C
Product Range	-
Automotive Qualification Standard	-
RoHS Phthalates Compliant	Yes
MSL	MSL 1 - Unlimited
SVHC	No SVHC (27-Jun-2018)
Base Number	27951
Device Type	LED
Dimming Control Type	PWM
Efficiency	85%
Input Voltage	2.8V to 5.5V
LED Driver Application	Display Backlighting Lighting
Operating Temperature Range	-40°C to +85°C
Termination Type	Surface Mount Device

Frequently Asked Questions

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The LM27951SD is listed under Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs.

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