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See Technical Specifications

LP5521YQX/NOPB

3 channel RGB/White LED driver with internal program memory and integrated charge pump

Manufacturer:

Texas Instruments
Mfr.Part #:

LP5521YQX/NOPB
Datasheet:

LP5521YQX/NOPB Datasheet (PDF)
Series:

LP5521
Mounting Style:

SMD/SMT
Number of Outputs:

3 Output
Output Current:

25.5 mA

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

LP5521YQX/NOPB General Description

The LP5521 is a three-channel LED driver designed to produce variety of lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, LP5521 can operate autonomously without processor control allowing power savings.

The device maintains excellent efficiency over a wide operating range by automatically selecting proper charge pump gain based on LED forward voltage requirements and is able to automatically enter power-save mode, when LED outputs are not active and thus lowering current consumption.

Three independent LED channels have accurate programmable current sources and PWM control. Each channel has program memory for creating desired lighting sequences with PWM control.

The LP5521 has a flexible digital interface. Trigger I/O and a 32-kHz clock input allow synchronization between multiple devices. Interrupt output can be used to notify processor, when LED sequence has ended. The LP5521 has four pin selectable I²C-compatible addresses. This allows connecting up to four parallel devices in one I²C-compatible bus. GPO and INT pins can be used as a digital control pin for other devices.

The LP5521 requires only four small, low-cost ceramic capacitors.

Comprehensive application tools are available, including command compiler for easy LED sequence programming.

For all available packages, see the orderable addendum at the end of the data sheet.

Key Features

Adaptive Charge Pump With 1× and 1.5× Gain Provides Up to 95% LED Drive Efficiency
Charge Pump with Soft Start and Overcurrent, Short-Circuit Protection
Low Input Ripple and EMI
Very Small Solution Size, No Inductor or Resistors Required
200-nA Typical Shutdown Current
Automatic Power Save Mode
I²C-Compatible Interface
Independently Programmable Constant Current Outputs with 8-Bit Current Setting and 8-Bit PWM Control
Typical LED Output Saturation Voltage 50 mV and Current Matching 1%
Three Program Execution Engines with Flexible Instruction Set
Autonomous Operation Without External Control
Large SRAM Program Memory
Two General Purpose Digital Outputs

Specifications

Product Category	LED Lighting Drivers	Series	LP5521
Mounting Style	SMD/SMT	Number of Outputs	3 Output
Output Current	25.5 mA	Input Voltage, Min	2.7 V
Input Voltage, Max	5.5 V	Topology	Boost
Operating Frequency	1.25 MHz	Output Voltage	4.5 V
Minimum Operating Temperature	- 30 C	Maximum Operating Temperature	+ 85 C
Features	I2C Control, Charge Pump	Development Kit	LP5521TMEV
Height	0.8 mm	High Level Output Current	25.5 mA
Input Voltage	2.7 V to 5.5 V	Length	5 mm
Number of Channels	3 Channel	Operating Supply Voltage	2.7 V to 5.5 V
Product Type	LED Lighting Drivers	Factory Pack Quantity	4500
Subcategory	Driver ICs	Supply Current - Max	1.5 mA
Width	4 mm	Unit Weight	0.032741 oz