LED Lighting

Efficiency, performance, size and reliability are rapidly imposing LEDs as the lighting solution of choice in space constrained portable electronic equipment as well as in architectural and accent lighting fixtures. Exar’s LED lighting products offers compact and efficient solutions for line and battery-operated devices and are capable of driving multiple LEDs in various series or parallel topologies.

The XRP7603, XRP7604 and SP7600 are Exar’s dedicated step down switching regulators for driving high Power LEDs in architectural, ambient and MR16 lighting applications. Operating at 1.2MHz which results in a minimum size solution, this family of devices is pin compatible for an evolutive design and can drive LEDs up to 500mA, 1Amp and 2Amps respectively.

LED Drivers and Flash Drivers

The XRP6840 is the industry’s highest Intensity LED Flash driver and constant current dual-cell supercapacitor charger. With an I2C based programmable 4.3A Flash LED current, it provides all the function to manage and drive high brightness LEDs in portable equipment using the emerging supercapacitor technology. The XRP7618 is an 8-channel constant-current LED driver capable of up to 100mA current per channel. Controlling strings of multiple LEDs with excellent accuracy, the XRP7618 can be paralleled to provide a performing backlighting solution for display and panels 10 inches and above. Individual channel can also be combined to increase current capability per channel.

The XRP7620 is a multi purpose 4-channel independently adjustable current sink driver. Optimized for LED backlighting and RGBW/RGBA color mixing applications, the XRP7620 can also be used as a generic software programmable current sink I/O expander. Supporting an industry standard 2-line I²C serial interface, the XRP7620 provides full independent control of each channel and can be programmed up to a current of 31.5mA in steps of 500µA. Look to Exar as a leading innovator for all of your LED lighting needs.

LED Lighting
 

Step-down Regulators

Step-down
High Power LED
1
4.5
29
6
1.2 MHz
200
0.5A
Step-down
High Power LED
1
4.5
29
6
1.2 MHz
200
1A
Step-down
High-Power LED
1
7
36
8
<1MHz
100
1.2A
Step-down
High Power LED
1
4.5
29
6
1.2 MHz
200
2A
TTL
Step-up Regulators

Boost
Backlight
1
2.5
16
8
n/a
n/a
TTL
4.2
30
84
Backlight
1
200
2.7
5.5
1200
0.3
6.0
600
80
Backlight
1
200
2.7
5.5
500
0.3
6.0
1200
90
Flash
1
700
2.7
4.5
2.7
5.5
92
Charge Pump
Backlight
4
2.7
5.5
1
3
600
90
Step-up/down Regulators

Charge Pump
Flash
1
2.7
5.5
1
400
n/a
TTL
Charge Pump
Flash
2.7
5.5
1
0.2
500
n/a
SWI
Charge Pump
Flash
1
2.7
5.5
1
700
n/a
TTL
Charge Pump
Flash
2.7
5.5
1
0.2
1200
n/a
TTL
Charge Pump
Flash
2.7
5.5
1
200
1450
3
I2C
Current Drivers

Linear
General
2
2.7
5.5
1
0.16
20
0.8
TTL
Linear
General
3
2.7
5.5
1
300
40
0.8
TTL
Linear
General
8
4.2
30
8
500
100
1.5
TTL
Current Driver
LED
4
2.7
5.5
31
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