FAN5608 Fairchild Semiconductor, FAN5608 Datasheet - Page 2

• Manufacturer Part Number: FAN5608
• Description: Serial/Parallel LED Driver with Current-Regulated/ Step-Up DC/DC Converter
• Manufacturer: Fairchild Semiconductor

Definition of Terms
Output Current Accuracy: reflects the difference between the measured value of the output current (LED) and
programmed value of this current .
Current Matching: refers to the absolute value of difference in current between the two LED branches.
Efficiency: is expressed as a ratio between the electrical power into the LEDs and the total power consumed from the input
power supply.
Although this definition leads to a lower value than the boost converter efficiency, it more accurately reflects better system per-
formance, from the user’s point-of-view.
Typical Application
PRODUCT SPECIFICATION
external resistor to set the current, and to turn the device ON
and OFF. The FAN5608DMPX/FAN5608MPX is available
in an 8-lead MLP package with or without an internal Schot-
2.7V TO 5V
2
V
EXTERNAL
C
IN
L = 4.7µH
R
R
3X3mm MLP-8 Package
with internal Schottky diode
Order Code: FAN5608DMPX
Efficiency (%)
V
A1
A2
IND
IND
IN
Output Current Accuracy (%)
V
GND
CH2
CH1
OUT
(Continued)
Current Matching (%)
=
4.7µF
(
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
V
LED
branch 1 I
Analog Brightness Control
=
×
=
(
----------------------------------------------------------------------------------------------------------- -
LED
I
OUT
(
---------------------------------------------------------------------------------------------- -
I
(
LED
I
branch 1
LED
measured I
branch 1 I
branch 1
2.7V TO 5V
V
tky diode. The FAN5608DHMPX is available in a 12-lead
MLP package with an internal Schottky diode.
I
EXTERNAL
V
OUT
+
IN
V
–
×
LED
–
programmed
OUT
+
I
IN
LED
C
I
IN
LED
branch 1 I
programmed
branch 2
L = 4.7µH
branch 2
R
R
×
3X3mm MLP-8 Package
with external Schottky diode
Order Code: FAN5608MPX
) 100
LED
IND
V
A1
A2
×
) 2 ⁄
IND
IN
) 100
×
branch 1
GND
CH2
CH1
NC
) 100
×
4.7µF
REV. 1.0.3 6/28/04
FAN5608
V
OUT