CAT4137 Datasheet, PDF (2/16 Pages) Catalyst Semiconductor – CMOS Boost Converter - White LED Driver

CAT4137
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, FB voltage
S¯¯H¯D¯N¯ voltage
SW voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Rating
Unit
-0.3 to +7
V
-0.3 to +7
V
-0.3 to 40
V
-65 to +160
°C
-40 to +150
°C
300
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
SW pin voltage
Ambient Temperature Range
LED Bias Current
Range
Unit
2.2 to 5.5
V
0 to 24
V
-40 to +85
°C
1 to 30
mA
ELECTRICAL OPERATING CHARACTERISTICS
V_IN = 3.6V, ambient temperature of 25ºC (over recommended operating conditions unless specified otherwise)
Symbol Parameter
I_Q Operating Current
I_SD Shutdown Current
V_FB FB Pin Voltage
I_FB FB pin input leakage
I_LED
V_IH
V_IL
F_SW
I_LIM
R_SW
I_LEAK
T_SD
T_HYS
η
V_UVLO
V_OV-SW
Programmed LED Current
S¯¯H¯D¯N¯ Logic High
S¯¯H¯D¯N¯ Logic Low
Switching Frequency
Switch Current Limit
Switch “On” Resistance
Switch Leakage Current
Thermal Shutdown
Thermal Hysteresis
Efficiency
Under-voltage lock out
(UVLO) threshold
Output Clamp Voltage
Conditions
V_FB = 0.3V
V_FB = 0.4V (not switching)
V_{S¯¯H¯D¯N¯} = 0V
3 LEDs with I_LED=20mA
R1 = 10Ω
R1 = 15Ω
R1 = 20Ω
Enable Threshold Level
Shutdown Threshold Level
I_SW = 100mA
Switch Off, V_SW = 5V
Typical Application Circuit
“Open LED” fault
Min Typ Max Unit
0.4
0.1
1.5
0.3
mA
0.1
1
µA
285
300
315
mV
0.1
1
µA
28.5
30
31.5
19
14.25
20
15
21
15.75
mA
0.8
1.5
V
0.4
0.7
V
0.7
1
1.3
MHz
250
300
400
mA
1.0
2.0
Ω
1
5
µA
150
ºC
20
ºC
86
%
1.9
V
29
V
Doc. No. MD-5012 Rev. B
2
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice