1
DATA SHORT
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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800mA Triple Output Laser Diode Driver
ISL58303
The ISL58303 is a high-speed triple output laser diode driver
designed to support color field sequential laser light source
Pico projection modules. Outputs can be ganged together to
achieve peak total current greater than 3.6A. Output channels
are designed with independent programmable bias and
threshold adjustment to support a wide range of laser diode
manufacturers. The ISL58303 offers exceptional power
efficiency and a high degree of system integration allowing a
compact and cost effective system design.
To assist with reduction of laser speckle, this laser diode driver
has a high frequency modulation input to modulate laser
pulses. This can be used to achieve outputs pulses of less than
1ns.
Interface to the system is accomplished via a high-speed serial
bus that is made up of SEN, SCLK and SDIO. Initialization of
internal registers after power-on reset, operational setup and
laser intensity data for each output channel are
communicated through this bus.
For laser operational safety, a hardware enable signal (CE) is
ANDed with an internal register bit. Both have to be asserted to
enable the device. This prevents an accidental fault causing an
unwanted laser output.
Features
• Complete triple programmable laser diode driver
• 800mA maximum output current per channel
• 1200mA peak output current per channel
• Ganging of multiple channels as well as multiple chips can
be done to meet the highest current demands
• ISL58303 has all N-MOS output channels (I
OUT1
, I
OUT2
and
I
OUT3
) for common anode laser diode configurations
• Independent output channel enable
• Programmable threshold DACs and color DACs for each
channel
• Supports High Frequency Modulation (HFM) that switches all
3 outputs in unison producing pulse widths of less than 1ns.
• Fast SPI serial interface
• Space saving package: 24 Ld 4mmx4mm TQFN
Applications
• RGB color field sequential laser projection system
• Time of flight measurement systems
• High speed/high current laser diode systems
FIGURE 1. ISL58303 TYPICAL APPLICATION LCOS
FIGURE 2. ISL58303 TYPICAL APPLICATION HIGH CURRENT
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9
6/
9
62
(1
(1
(1
&(
6(1
6&/.
6',2
9
9
56(7
,
287
,
287
,
287
9729
/&R6
'5,9(5
0&8
(/
,
6(7
+)0
ISL5830 3
V
SO
CE
SEN
SCLK
SDIO
MCU
RSET
MON
EN2
EN3
EN1
5V
HFM
I
OUT 1
I
OUT 2
I
OUT 3
September 1, 2016
FN7555.3
