CAT3644 Datasheet, PDF (2/14 Pages) Catalyst Semiconductor – 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver

CAT3644
ABSOLUTE MAXIMUM RATINGS
Parameter
V_IN, LEDx, C1±, C2± voltage
V_OUT voltage
EN/DIM voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Rating
Unit
6
V
7
V
6
V
-65 to +160
°C
-40 to +125
°C
300
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
V_IN
Ambient Temperature Range
I_LED per LED pin
Total Output Current
LED Forward Voltage Range
Rating
Unit
2.5 to 5.5
V
-40 to +85
°C
0 to 25
mA
0 to 100
mA
1.3 to 4.3
V
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
(over recommended operating conditions unless specified otherwise) V_IN = 3.6V, EN = High, T_AMB = 25°C
Symbol Name
I_Q
Quiescent Current
I_QSHDN
I_LED-ACC
I_LED-DEV
V_RSET
Shutdown Current
LED Current Accuracy
LED Channel Matching
RSET Regulated Voltage
R_OUT Output Resistance (open loop)
F_OSC
I_{SC_MAX}
I_{IN_MAX}
LED_TH
V_HYS
T_DF
R_EN/DIM
V_HI
V_LO
T_SD
T_HYS
V_UVLO
Charge Pump Frequency
Output short circuit Current Limit
Input Current Limit
1x to 1.33x or 1.33x to 1.5x or 1.5x to 2x
Transition Thresholds at any LED pin
1x Mode Transition Hysteresis
Transition Filter Delay
EN/DIM Pin
• Internal Pull-down Resistor
• Logic High Level
• Logic Low Level
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO) threshold
Conditions
1x mode, no load
1.33 x mode, no load
1.5x mode, no load
2x mode, no load
V_EN = 0V
I_LEDAVG / I_{LEDAVG-NOMINAL}
(I_LED - I_LEDAVG) / I_LEDAVG
1x mode
1.33x mode, V_IN = 3V
1.5x mode, V_IN = 2.7V
2x mode, V_IN = 2.4V
1.33x and 2x mode
1.5x mode
V_OUT < 0.5V
V_OUT > 1V
Min Typ Max Units
1.0
mA
1.7
mA
2.2
mA
2.4
mA
1
µA
±2
%
±1.5
%
0.58 0.6 0.62 V
0.8
Ω
5
Ω
5
Ω
10
Ω
0.8
1
1.3 MHz
1
1.3 1.6 MHz
50
mA
250
mA
130
mV
400
mV
500
µs
100
kΩ
1.3
V
0.4
V
150
°C
20
°C
1.6 1.8 2.0
V
Doc. No. 5023, Rev. B
2
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice