cat4240 Catalyst Semiconductor, cat4240 Datasheet - Page 4

• Manufacturer Part Number: cat4240
• Description: 6 Watt Boost Led Driver
• Manufacturer: Catalyst Semiconductor

CAT4240
TYPICAL CHARACTERISTICS
VIN = 5V, V
Doc. No. MD-5026 Rev. C
Efficiency vs. Load Current (6 LEDs)
Power-up with 6 LEDs at 300mA
L
350
300
250
200
150
100
100
LED Current vs. Input Voltage
= 13V, T
95
90
85
80
50
8
9 10 11 12 13 14 15 16
INDUCTOR VOLTAGE [V]
100
AMB
LED CURRENT [mA]
= 25ºC, typical application circuit unless otherwise specified.
150
RSET = 1Ω
VOUT = 19.5V
RSET = 2Ω
VOUT = 18.8V
200
250
300
4
Efficiency vs. Inductor Voltage (6 LEDs)
100
-0.5
-1.0
-1.5
-2.0
2.0
1.5
1.0
0.5
0.0
95
90
85
80
LED Current Regulation
8
8
Switching Waveform
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
INDUCTOR VOLTAGE [V]
INDUCTOR VOLTAGE [V]
Characteristics subject to change without notice
6 LEDs @ 150mA
© Catalyst Semiconductor, Inc.