Datasheet
3Maxim Integrated
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
MAX16833/MAX16833B–MAX16833D
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, R
RT
= 12.4kI, C
IN
= C
VCC
= 1µF, C
LFRAMP
/C
REF
= 0.1µF, NDRV = COMP = DIMOUT = PWMDIM = FLT = unconnected,
V
OVP
= V
CS
= V
PGND
= V
SGND
= 0V, V
ISENSE+
= V
ISENSE-
= 45V, V
ICTRL
= 1.40V, T
A
= T
J
= -40NC to +125NC, unless otherwise
noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Synchronization Logic-High Input V
IH-SYNC
VRT rising 3.8 V
Synchronization Frequency Range f
SYNCIN
1.1f
SW
1.7f
SW
SLOPE COMPENSATION
Slope Compensation
Current-Ramp Height
I
SLOPE
Ramp peak current added to CS input
per switching cycle
46 50 54
FA
DITHERING RAMP GENERATOR (LFRAMP) (MAX16833/MAX16833C only)
Charging Current V
LFRAMP
= 0V 80 100 120
FA
Discharging Current V
LFRAMP
= 2.2V 80 100 120
FA
Comparator High Trip Threshold 2 V
Comparator Low Trip Threshold V
RT
V
REFERENCE OUTPUT (REF) (MAX16833B/MAX16833D only)
Reference Output Voltage V
REF
I
REF
= 0 to 80FA
1.604 1.636 1.669 V
ANALOG DIMMING (ICTRL)
Input-Bias Current IB
ICTRL
V
ICTRL
= 0.62V 0 35 200 nA
LED CURRENT-SENSE AMPLIFIER
ISENSE+ Input-Bias Current IB
ISENSE+
V
ISENSE+
= 65V, V
ISENSE-
= 64.8V 200 400 700
FA
ISENSE+ Input-Bias Current with
DIM Low
IB
ISENSE+OFF
V
ISENSE+
= 48V, V
ISENSE-
= 48V,
PWMDIM = 0
200
FA
ISENSE- Input-Bias Current IB
ISENSE-
V
ISENSE+
= 65V, V
ISENSE-
= 64.8V 2 5 8
FA
Voltage Gain 6.15 V/V
Current-Sense Voltage V
SENSE
V
ICTRL
= 1.4V 195 199 203
mVV
ICTRL
= 0.616V 100
V
ICTRL
= 0.2465V 38.4 40 41.4
Bandwidth BW AV
DC
- 3dB 5 MHz
COMP
Transconductance GM
COMP
2100 3500 4900
FS
Open-Loop DC Gain AV
OTA
75 dB
COMP Input Leakage I
LCOMP
-300 +300 nA
COMP Sink Current I
SINK
100 400 700
FA
COMP Source Current I
SOURCE
100 400 700
FA
PWM COMPARATOR
Input Offset Voltage V
OS-PWM
2 V
Leading-Edge Blanking 50 ns
Propagation Delay to NDRV t
ON(MIN)
Includes leading-edge blanking time with
10mV overdrive
55 80 110 ns
CS LIMIT COMPARATOR
Current-Limit Threshold V
CS_LIMIT
406 418 430 mV
CS Limit-Comparator
Propagation Delay to NDRV
t
CS_PROP
10mV overdrive (excluding leading-edge
blanking time)
30 ns
Leading-Edge Blanking 50 ns