CAT32_08 Datasheet, PDF (3/14 Pages) Catalyst Semiconductor – CMOS White LED Driver

CAT32
ABSOLUTE MAXIMUM RATINGS ⁽¹⁾
Parameter
V_IN, LED, ¯S¯H¯D¯N¯ voltage
SW voltage
RSET voltage
Storage Temperature Range
Junction Temperature
Lead Soldering Temperature (10 secs)
ESD Rating – Human Body Model
Rating
Unit
8
V
20
V
1
V
-65 to +150
ºC
125
ºC
300
ºC
2000
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Range
Unit
V_IN
2 to 7
V
Ambient Temperature Range
-40 to +85
ºC
Inductor L1
6.8 ±20% typical
µH
Input Capacitor C1
4.7 ±20% typical
µF
Output Capacitor C2
1.0 ±20% typical
µF
I_LED with 1 to 4 LEDs in series
0 to 20
mA
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
Over recommended operating conditions unless otherwise specified. T_A = 25ºC, V_IN = 2V and V_{¯S¯H¯D¯N¯} = 1.2V.
Symbol
I_Q
I_GND
V_LED
I_LED
I_LED
I_LED
V_RSET
f_SW
I_SWL
R_SW
Parameter
Quiescent Current
Ground Current in Shutdown
LED Pin Voltage
LED Current Adjust Range
Programmed LED Current
LED Pin Current Temperature Coefficient
RSET Pin Voltage
Shutdown Pin Logic High Level
Shutdown Pin Logic Low Level
Boost Converter Frequency
Switch Current Limit
Switch Resistance
Switch Leakage Current
Efficiency
Conditions
V_RSET = 0.2V
V_{¯S¯H¯D¯N¯} = 0V
V_IN < V_OUT, I_LED =15mA
R_SET = 562Ω
R_SET = 750Ω
R_SET = 1.5kΩ
R_SET = 4.53kΩ
I_LED = 15mA
R_SET = 1.5kΩ
V_IN = 2V, I_SW = 100mA
V_IN = 3V, I_SW = 100mA
Switch Off, V_SW = 5V
Components shown on
Figure 1
Min
5
33
25
12.5
0.85
0.8
400
Typ
0.5
0.05
120
38
30
15
5
-0.01
100
1.2
550
0.7
0.5
0.01
83
Max Unit
0.7 mA
1
µA
180 mV
40 mA
45
36
mA
17.5
mA/°C
mV
V
0.25 V
1.6 MHz
780 mA
1.2
Ω
0.9
Ω
5
µA
%
Notes:
(1) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods
may affect device reliability. All voltages are with respect to ground.
© Catalyst Semiconductor, Inc.
3
Characteristics subject to change without notice
Doc. No. MD-5001 Rev. AD