MAX16838B Datasheet, PDF (7/21 Pages) Maxim Integrated Products – Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

MAX16838B
Integrated, 2-Channel, High-Brightness LED Driver
with High-Voltage Boost and SEPIC Controller
Typical Operating Characteristics (continued)
(V_IN = V_EN = 12V, R_RT = 12.2kΩ, R_ISET = 15kΩ, C_VCC = 1µF, V_CC = V_DRV = V_CFB, V_DRAIN = V_COMP = V_{OUT_}, FLT = unconnected,
V_OV = V_CS = V_LEDGND = V_DIM = V_PGND = V_SGND = 0V, V_GATE = V_NDRV, T_A = +25°C, unless otherwise noted.)
DRV LINE REGULATION
5.010
5.005
5.000
4.995
TA = +125°C TA = +25°C
4.990
4.985
4.980
TA = -40°C
4.975
0
10
20
30
40
50
INPUT VOLTAGE (V)
DRV LOAD REGULATION
5.010
5.005
TA = +125°C
5.000
4.995
4.990
TA = +25°C
4.985
4.980
TA = -40°C
4.975
4.970
4.965
0
VIN = 12V
5 10 15 20 25 30
LOAD (mA)
FREQUENCY vs. RRT
2.5
VIN = 12V
2.0
1.5
1.0
0.5
0
0 4 8 12 16 20 24 28 32 36 40
RRT (kΩ)
LED SWITCHING WITH DIM AT 200Hz
(50% DUTY CYCLE)
MAX16838B toc12
I_OUT1
10mA/div
0A
IOUT2
VDIM
2ms/div
100mA/div
0A
5V/div
0V
ILED vs. RISET
150
140
VIN = 12V
130
120
110
100
90
80
70
60
50
40
30
20
10
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75
RISET (kΩ)
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