MAX16819_15 Datasheet, PDF (5/9 Pages) Maxim Integrated Products – 2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming

MAX16819/MAX16820
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
Typical Operating Characteristics (continued)
(VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.5Ω connected between IN and CSN. Typical values at TA = +25°C, unless otherwise
noted.)
PWM DIMMING AT 200Hz
(1% DUTY CYCLE)
MAX16819 toc09
VIN = 12V, L = 47µH,
1 LED MAX16819
VDIM
2V/div
0V
ILED
200mA/div
0A
10µs/div
PWM DIMMING AT 20kHz
(10% DUTY CYCLE)
MAX16819 toc12
VIN = 24V, L = 47µH,
4 LEDS MAX16820
VDIM
2V/div
0V
ILED
200mA/div
0A
10µs/div
PWM DIMMING EXPANDED
(50% DUTY CYCLE)
MAX16819 toc10
VIN = 24V, L = 33µH,
4 LEDS MAX16820
VDIM
2V/div
0V
ILED
200mA/div
0A
1µs/div
PWM DIMMING AT 20kHz
(90% DUTY CYCLE)
MAX16819 toc13
VIN = 24V, L = 33µH,
4 LEDS MAX16820
VDIM
2V/div
0V
ILED
200mA/div
0A
10µs/div
PWM DIMMING EXPANDED
(50% DUTY CYCLE)
MAX16819 toc11
VIN = 12V, L = 47µH,
1 LED MAX16819
VDIM
2V/div
4µs/div
0V
ILED
200mA/div
0A
ILED VARIATION vs. TEMPERATURE
2.0
ILED(NOMINAL) = 400mA
1.5
L = 47µH
1.0
VIN = 24V
0.5
0
-0.5
VIN = 12V
-1.0
-1.5
VDIM = 0V
-2.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
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