CAT3643 Datasheet, PDF (3/15 Pages) Catalyst Semiconductor – 3-Channel Ultra High Efficiency Quad-Mode TM LED Driver

CAT3643
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
I_Q
Quiescent Current
1x mode, no load
1.0
1.33x mode, no load
1.7
1.5x mode, no load
2.2
2x mode, no load
2.4
I_QSHDN
I_LED−ACC
Shutdown Current
LED Current Accuracy
V_EN = 0 V
(I_LEDAVG – I_NOMINAL) / I_NOMINAL
±2
RSET = 5 kW
I_LED−DEV
V_RSET
R_OUT
LED Channel Matching
RSET Regulated Voltage
Output Resistance (open loop)
F_OSC
Charge Pump Frequency
(I_LED − I_LEDAVG) / I_LEDAVG
1x mode
1.33x mode, V_IN = 3 V
1.5x mode, V_IN = 2.7 V
2x mode, V_IN = 2.4 V
1.33x and 2x mode
1.5x mode
±1.5
0.58
0.6
0.8
5
5
10
0.8
1
1
1.3
I_{SC_MAX} Output short circuit Current Limit
V_OUT < 0.5 V
50
I_{IN_MAX} Input Current Limit
V_OUT > 1 V
250
LED_TH 1x to 1.33x or 1.33x to 1.5x or 1.5x to 2x
130
Transition Thresholds at any LED pin
V_HYS
T_DF
R_EN/DIM
V_HI
V_LO
T_SD
T_HYS
V_UVLO
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
400
500
100
1.3
150
20
1.6
1.8
Max
1
0.62
1.3
1.6
0.4
2.0
Units
mA
mA
%
%
V
W
MHz
mA
mA
mV
mV
ms
kW
V
V
°C
°C
V
http://onsemi.com
3