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CAT3643HV2-T2 Datasheet, PDF (3/17 Pages) ON Semiconductor – 3-Channel Ultra High Efficiency Quad-Mode LED Driver
CAT3643
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, LEDx, C1±, C2±, EN/DIM, RSET 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
Rating
Unit
VIN
Ambient Temperature Range
ILED per LED pin
LED Forward Voltage Range
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) VIN = 3.6V, EN = High, TAMB = 25°C
Symbol Name
Conditions
Min Typ Max Units
IQ
Quiescent Current
1x mode, no load
1.33 x mode, no load
1.5x mode, no load
2x mode, no load
1.0
mA
1.7
mA
2.2
mA
2.4
mA
IQSHDN
ILED-ACC
Shutdown Current
LED Current Accuracy
VEN = 0V
(ILEDAVG – INOMINAL) / INOMINAL
RSET = 5kΩ
1
µA
±2
%
ILED-DEV LED Channel Matching
VRSET RSET Regulated Voltage
ROUT Output Resistance (open loop)
FOSC Charge Pump Frequency
(ILED - ILEDAVG) / ILEDAVG
1x mode
1.33x mode, VIN = 3V
1.5x mode, VIN = 2.7V
2x mode, VIN = 2.4V
1.33x and 2x mode
1.5x mode
±1.5
0.58 0.6 0.62
0.8
5
5
10
0.8
1
1.3
1
1.3 1.6
%
V
Ω
Ω
Ω
Ω
MHz
MHz
ISC_MAX
IIN_MAX
LEDTH
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
VOUT < 0.5V
VOUT > 1V
50
mA
250
mA
130
mV
VHYS
TDF
REN/DIM
VHI
VLO
1x Mode Transition Hysteresis
Transition Filter Delay
EN/DIM Pin
• Internal Pull-down Resistor
• Logic High Level
• Logic Low Level
400
mV
500
µs
100
kΩ
1.3
V
0.4
V
TSD
THYS
VUVLO
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO) threshold
150
°C
20
°C
1.6 1.8 2.0
V
© 2008 SCILLC. All rights reserved.
3
Characteristics subject to change without notice
Doc. No. MD-5022 Rev. G