CAT3637 Datasheet, PDF (3/14 Pages) Catalyst Semiconductor – 6-Channel Programmable High Efficiency Quad-Mode™ LED Driver

CAT3637
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
(over recommended operating conditions unless specified otherwise) V_IN = 3.6 V, EN = High, T_AMB = 25°C
Symbol
Name
Conditions
Min Typ Max Units
I_Q
Quiescent Current
1x mode, V_IN = 4.2 V
1.33x mode, V_IN = 3.3 V
1.5x mode, V_IN = 2.8 V
2x mode, V_IN = 2.5 V
1.5
mA
2.8
3.7
3.8
I_QSHDN
I_LED−ACC
I_LED−DEV
Shutdown Current
LED Current Accuracy
LED Channel Matching
R_OUT
Output Resistance (open loop)
V_EN = 0 V
2 mA ≤ I_LED ≤ 30 mA
I_LED * I_LEDAVG
I_LEDAVG
1x mode, I_OUT = 120 mA
1.33x mode, I_OUT = 120 mA
1.5x mode, I_OUT = 120 mA
2x mode, I_OUT = 120 mA
1
mA
±3
%
±1
%
0.5
W
3.5
3.5
6
F_OSC
Charge Pump Frequency
1.33x and 2x mode
1.5x mode
0.6
0.8
1.1
MHz
0.8
1.1
1.4
I_{SC_MAX}
LED_TH
Output short circuit Current Limit
1x to 1.33x or 1.33x to 1.5x or
1.5x to 2x Transition Thresholds at any LEDx pin
V_OUT < 0.5 V
80
mA
150
mV
V_HYS
T_DF
I_{IN_MAX}
R_EN/DIM
V_HI
V_LO
1.33x to 1x Transition Hysteresis
Mode Transition Filter Delay
Input Current Limit
EN/DIM Pin
− Internal Pull−down Resistor
− Logic High Level
− Logic Low Level
V_IN − Highest LED V_F
V_OUT > 1 V
400
mV
120
ms
450
mA
100
kW
1.3
V
0.4
V
T_SD
T_HYS
V_UVLO
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO) threshold
150
°C
20
°C
2
V
NOTE: Typical application circuit with external components is shown on page 2.
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