Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX16832C User Manual
Page 3
MAX16832A/MAX16832C
2MHz, High-Brightness LED Drivers with
Integrated MOSFET and High-Side Current Sense
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIM INPUT
DIM Input-Voltage High
V
IH
V
IN
- V
CS
= 100mV
2.8
V
DIM Input-Voltage Low
V
IL
V
CS
- V
IN
= 100mV
0.6
V
DIM Turn-On Time
t
DIM_ON
V
DIM
rising edge to V
LX
< 0.5V
IN
200
ns
DIM Input Leakage High
V
DIM
= V
IN
8
15
µA
DIM Input Leakage Low
V
DIM
= 0V
-3
-1.5
0
µA
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Temperature rising
+165
o
C
Thermal-Shutdown Threshold
Hysteresis
10
o
C
THERMAL FOLDBACK
Thermal-Foldback Enable
Threshold Voltage
V
TFB_ON
V
DIM
= 5V
1.9
2.0
2.12
V
Thermal-Foldback Slope
FB
SLOPE
V
DIM
= 5V
0.75
1/V
TEMP_I Output Bias Current
I
TEMP_I
25
26.5
28
µA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +24V, V
DIM
= V
IN
, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
EFFICIENCY
vs. INPUT VOLTAGE
MAX16832A toc01
V
IN
(V)
EFFICIENCY (%)
55
45
35
25
15
75
80
85
90
95
100
70
5
65
1 LED
3 LEDs
5 LEDs
7 LEDs
9 LEDs
11 LEDs 13 LEDs 15 LEDs
9 LEDs
DUTY CYCLE
vs. INPUT VOLTAGE
MAX16832A toc02
V
IN
(V)
DUTY CYCLE (%)
55
45
35
25
15
10
20
30
40
50
60
70
80
90
100
0
5
65
1 LED
3 LEDs
5 LEDs
7 LEDs
15 LEDs
13 LEDs
11 LEDs
FREQUENCY
vs. INPUT VOLTAGE
MAX16832A toc03
V
IN
(V)
FREQUENCY (kHz)
55
45
35
25
15
50
100
150
200
250
300
350
400
450
500
0
5
65
1 LED
3 LEDs
5 LEDs
7 LEDs
9 LEDs
11 LEDs
13 LEDs
15 LEDs
16 LEDs
Typical Operating Characteristics
(V
IN
= V
DIM
= 48V, R
SENSE
= 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at T
A
= +25°C, unless otherwise
noted.)