CAT3643 Datasheet, PDF (2/15 Pages) Catalyst Semiconductor – 3-Channel Ultra High Efficiency Quad-Mode TM LED Driver

CAT3643
1 mF
1 mF
V_IN
2.4 V ^CIN
to
5.5 V 1 mF
1−Wire
EZDimt
Programming
4.02 kΩ
C1+ C1− C2+ C2−
V_IN
V_OUT
CAT3643
EN/DIM
RSET
GND
LED1
LED2
LED3
V_OUT
C_OUT
1 mF
20 mA
Figure 1. Typical Application Circuit
LED1
1
GND
1
LED2
C2+
LED2
C2−
LED3
C2−
LED3
C2+
RSET
C1−
NC
C1−
EN/DIM
C1+
RSET
C1+
VOUT
VIN
TDFN−12
TQFN−16
Figure 2. Pin Configurations (Top Views)
The CAT3643 is offered in three different packages. The 12−pad TDFN 3 mm x 3 mm with a max height of 0.8 mm is
pin−compatible to the ON Semiconductor CAT3603 LED driver. The 16−pad TQFN 3 mm x 3 mm with max height of 0.8 mm
is also offered.
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
V_IN, LEDx, C1±, C2±, EN/DIM, RSET voltage
V_OUT voltage
Storage Temperature Range
6
V
7
V
−65 to +160
°C
Junction Temperature Range
−40 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter
V_IN
Ambient Temperature Range
I_LED per LED pin
LED Forward Voltage Range
NOTE: Typical application circuit with external components is shown above.
Rating
Unit
2.5 to 5.5
V
−40 to +85
°C
up to 30
mA
1.3 to 4.3
V
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