FAN5606 Datasheet, PDF (2/9 Pages) Fairchild Semiconductor – Serial LED Driver with Current-Regulated, Step-Up DC/DC Converter

FAN5606
Pin Assignment
A¹
B²
CAT ³
IND ⁴
8 V_IN
7 _NC
6 _GND
5 V_OUT
FAN5606
8-Lead 3x3mm MLP
PRODUCT SPECIFICATION
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
Pin Name
A
B
CAT
IND
V_OUT
GND
NC
V_IN
Pin Function Description
DAC A Input
DAC B Input
LED Cathode
Inductor
Output LED’s Anode
Ground
No Connection
Input Voltage
Definition of Terms
Output Current Accuracy: reflects the difference between the measured value of the output current (LED) and
programmed value of this current.
Output Current Accuracy (%) = ⁽---I--^O----^U----^T-----m----e---a---s--u---r--e---d----–-----I--^O----^U----^T----p---r--o---g---r--a---m-----m----e---d---⁾----^×-----1---0---0-
I_OUT programmed
Efficiency: is expressed as a ratio between the electrical power into the LEDs and the total power consumed from the input
power supply.
Efficiency (%) = -⁽--V----^L----^E---^D---V----^×-_I--_N--I--^L-_×--^E--I--^D-_I--_N--⁾----^×-----1---0---0-
Although this definition leads to a lower value than the boost converter efficiency, it more accurately reflects better system
performance, from the user’s point-of-view.
2
REV. 1.0.3 1/7/05