ISL97900CRZ-T Intersil, ISL97900CRZ-T Datasheet

ISL97900CRZ-T

Manufacturer Part Number

ISL97900CRZ-T

Description

LED Lighting Drivers High Current RGB Driver/Controller, 28L 4x5 QFN, Commercial

Manufacturer

Intersil

Datasheet

1.ISL97900CRZ-T.pdf (2 pages)

Specifications of ISL97900CRZ-T

Rohs

yes

Input Voltage

5.5 V

Operating Frequency

2.5 MHz

Output Current

1.5 A

Maximum Operating Temperature

+ 70 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

0 C

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RGB Buck-Boost 3-Channel Color Sequencing LED

Driver

ISL97900

The ISL97900 is a highly efficient 3-channel, 1.5A sequential

LED driver powered from a single-cell Li-ion battery, or

regulated input voltage up to 5.5V. This LED driver incorporates

an independent current controlled driving mechanism for each

of the LED's, which allows accurate current control of the LED

brightness.

The ISL97900 utilizes a buck-boost converter to ensure that

optimum output voltage is maintained for a wide range of LED

forward voltages. The integrated buck-boost converter

operates well over 90% efficiency across a wide range of

operating conditions. The power conversion core implements a

proprietary algorithm that allows seamless transitions and

glitch-free operation between the buck and the boost modes

as the battery voltage drops during operation.

The ISL97900 architecture includes a 10-bit DAC, which

controls the LED currents. Each of the LED currents can be

programmed through serial interface.

The ISL97900 also includes the Dynamic Headroom

Management function to provide seamless adjustment for the

LEDs’ voltages, which reduces power consumption.

November 19, 2012

FN8372.0

DRIVER ASIC

LCoS

1.8V

SCL

SDA

CEN

SGND

EN3

EN2

EN1

2.8V TO 4.3V

BATT

FIGURE 1. TYPICAL APPLICATION

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

1µF

0.1µF

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

22µF

Features

• Buck-boost based LED driver

• RGB color sequencing

• Up to 1.5A output current

• I

• 150mV feedback voltage reference for current regulation to

• 2.5MHz switching frequency

• Programmable output voltage and output current for each

• Dynamic headroom management

• Internal current setting registers

• Ambient temperature range: 0°C to +70°C

• Pb-free (RoHS compliant)

Applications

• LED-based pico projector in mobile phones

• Stand-alone pico projectors

• Tri-stimulus display drivers

• Other handheld display drivers

maximize efficiency

LED

ADDR

CEN

VCC

CBYP

SGND

PVIN

SCL

SDA

C Interface

22µF

All other trademarks mentioned are the property of their respective owners.

THERMAL

(GND)

2.2µH

PAD

10µF

VOUT

SGND

LED1

LED2

LED3

22µF

0.1Ω

1µF

10µF

Related parts for ISL97900CRZ-T

ISL97900CRZ-T Summary of contents

Page 1

... SGND FIGURE 1. TYPICAL APPLICATION CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners ...

Page 2

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. ...

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