Datasheet

4 Maxim Integrated
Integrated, 4-Channel, High-Brightness LED
Driver with High-Voltage DC-DC Controller
MAX16814
Note 2: All MAX16814A_ _ are 100% tested at T
A
= +125NC, while all MAX16814U_ _ and MAX16814B _ _ _ are 100% tested at
T
A
= +25°C. All limits overtemperature are guaranteed by design , not production tested.
Note 3: CS threshold includes slope compensation ramp magnitude.
Note 4:
Gain = δV
COMP
/δV
CS
, 0.05V < V
CS
< 0.15V.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= 12V, R
RT
= 12.25kI, R
SETI
= 15kI, C
VCC
= 1FF, V
CC
= V
DRV
, NDRV = COMP = OUT_ = unconnected, V
RSDT
= V
DIM
= V
CC
, V
OVP
= V
CS
= V
LEDGND
= V
PGND
= V
SGND
= 0V, T
A
= T
J
= -40NC to +125NC for MAX16814A_ _, T
A
= -40NC to +85NC for
MAX16814BE_ _, and T
A
= T
J
= 0NC to +85NC for MAX16814U_ _ and MAX16814BU_ _, unless otherwise noted. Typical values are at
T
A
= +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Current Accuracy
I
OUT_
=
100mA
T
A
= +125°C, MAX16814A_ _
only
±3
%
T
A
= -40°C to +125°C,
MAX16814A_ _ only
±5
I
OUT_
=
50mA to
150mA
T
A
= +25°C, MAX16814U_ _ and
MAX16814B_ _ _
±2.75
T
A
= 0°C to +85°C, MAX16814U_
_ and MAX16814BU _ _
±4
T
A
= -40°C to +85°C for
MAX16814BE _ _
±4
OUT_ Leakage Current V
DIM
= 0V, V
OUT_
= 40V 1 µA
LOGIC INPUTS/OUTPUTS
EN Reference Voltage
V
EN
rising, MAX16814A_ _ only 1.125 1.23 1.335
V
V
EN
rising, MAX16814U_ _ and
MAX16814B_ _ _
1.144 1.23 1.316
EN Hysteresis 50 mV
EN Input Current V
EN
= 40V ±600 nA
DIM Input High Voltage 2.1 V
DIM Input Low Voltage 0.8 V
DIM Hysteresis 250 mV
DIM Input Current ±2
µA
DIM to LED Turn-On Delay DIM rising edge to 10% rise in I
OUT_
100 ns
DIM to LED Turn-Off Delay DIM falling edge to 10% fall in I
OUT_
100 ns
I
OUT_
Rise and Fall Times 200 ns
FLT Output Low Voltage V
IN
= 4.75V and I
SINK
= 5mA 0.4 V
FLT Output Leakage Current V
FLT
= 5.5V 1.0 µA
LED Short Detection Threshold Gain = 3V 1.75 2.0 2.25 V
Short Detection Comparator Delay 6.5
µs
RSDT Leakage Current ±600 nA
OVP Trip Threshold Output rising 1.19 1.228 1.266 V
OVP Hysteresis 70 mV
OVP Leakage Current V
OVP
= 1.25V ±200 nA
Thermal-Shutdown Threshold Temperature rising 165 °C
Thermal-Shutdown Hysteresis 15 °C