CAT3648 Datasheet, PDF (2/14 Pages) Catalyst Semiconductor – 4-Channel Ultra High Efficiency Quad-Mode™ LED Driver with 32 Dimming Levels

CAT3648
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, LEDx, C1±, C2±, EN/DIM voltage
VOUT voltage
Storage Temperature Range
Junction Temperature Range
Rating
Unit
6
V
7
V
-65 to +160
°C
-40 to +150
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Ambient Temperature Range
I_LED per LED pin
LED Forward Voltage Range
Rating
Unit
2.5 to 5.5
V
-40 to +85
°C
up to 30
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
Shutdown Current
LED Current Setting
I_LED-ACC LED Current Accuracy
Conditions
1x mode, excluding load
1.33 x mode, excluding load
1.5x mode, excluding load
2x mode, excluding load
V_EN = 0V
RSET = 3.74kΩ
RSET = 7.50kΩ
(I_LEDAVG – I_NOMINAL) / I_NOMINAL
RSET = 4.99kΩ
Min Typ Max
1.0
1.7
2.2
2.4
1
20
10
±2
I_LED-DEV
V_RSET
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
Mode Transition Filter Delay
EN/DIM Pin
• Internal Pull-down Resistor
• Logic High Level
• Logic Low Level
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO) threshold
(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, 1x mode
±1.5
0.58 0.6 0.62
0.8
5
5
10
0.8
1
1.3
1
1.3
1.6
50
250
130
400
120
100
1.3
0.4
150
20
1.6
1.8
2.0
Units
mA
mA
mA
mA
µA
mA
%
%
V
Ω
Ω
Ω
Ω
MHz
MHz
mA
mA
mV
mV
µs
kΩ
V
V
°C
°C
V
Doc. No. MD-5031, Rev. A
2
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice