W-52 Datasheet, PDF (3/11 Pages) Copal Electronics – CMOS White LED Driver

W-52
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
V_IN, LED, SHDN voltage
SW voltage
8
V
20
V
RSET voltage
1
V
Storage Temperature Range
ï65 to +150
$C
Junction Temperature
125
$C
Lead Soldering Temperature (10 secs)
300
$C
ESD Rating – Human Body Model
2000
V
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 3. RECOMMENDED OPERATING CONDITIONS
Parameter
V_IN
Ambient Temperature Range
Inductor L1
Input Capacitor C1
Output Capacitor C2
I_LED with 1 to 4 LEDs in series
NOTE: Typical application circuit with external components is shown on page 2.
Range
Unit
2 to 7
V
ï40 to +85
$C
6.8 (20% typical
H
4.7 (20% typical
F
1.0 (20% typical
F
0 to 20
mA
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Over recommended operating conditions unless otherwise specified. T_A = 25$C, V_IN = 2 V and V_SHDN = 1.2 V.)
Symbol
Parameter
Conditions
Min
Typ
I_Q
I_GND
V_LED
I_LED
I_LED
Quiescent Current
Ground Current in Shutdown
LED Pin Voltage
LED Current Adjust Range
Programmed LED Current
I_LED
V_RSET
LED Pin Current Temperature Coefficient
RSET Pin Voltage
Shutdown Pin Logic High Level
V_RSET = 0.2 V
V_SHDN = 0 V
V_IN < V_OUT, I_LED = 15 mA
R_SET = 562
R_SET = 750
R_SET = 1.5 k
R_SET = 4.53 k
I_LED = 15 mA
R_SET = 1.5 k
0.5
0.05
120
5
33
38
25
30
12.5
15
5
ï0.01
100
0.85
Shutdown Pin Logic Low Level
f_SW
I_SWL
R_SW
Boost Converter Frequency
Switch Current Limit
Switch Resistance
Switch Leakage Current
Efficiency
0.8
400
V_IN = 2 V, I_SW = 100 mA
V_IN = 3 V, I_SW = 100 mA
Switch Off, V_SW = 5 V
Components shown on Figure 1
1.2
550
0.7
0.5
0.01
83
Max
0.7
1
180
40
45
36
17.5
0.25
1.6
780
1.2
0.9
5
Unit
mA
A
mV
mA
mA
mA/$C
mV
V
V
MHz
mA
A
%
3