EVALUATION KIT AVAILABLE
MAX16833/MAX16833B–MAX16833D
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
General Description
The MAX16833/MAX16833B–MAX16833D are peak
current-mode-controlled LED drivers for boost, buck-
boost, SEPIC, flyback, and high-side buck topologies. A
dimming driver designed to drive an external p-channel
in series with the LED string provides wide-range dim-
ming control. This feature provides extremely fast PWM
current switching to the LEDs with no transient overvolt-
age or undervoltage conditions. In addition to PWM dim-
ming, the ICs
provide
analog dimming using a DC input
at ICTRL. The ICs sense the LED current at the high side
of the LED string.
A single resistor from RT/SYNC to ground sets the
switching frequency from 100kHz to 1MHz, while an
external clock signal capacitively coupled to RT/SYNC
allows the ICs to synchronize to an external clock. In
the MAX16833/MAX16833C, the switching frequency
can be dithered for spread-spectrum applications. The
MAX16833B/MAX16833D instead provide a 1.64V refer-
ence voltage with a 2% tolerance.
The ICs operate over a wide 5V to 65V supply range
and include a 3A sink/source gate driver for driving
a power MOSFET in high-power LED driver applica-
tions. Additional features include a fault-indicator output
(FLT) for short or overtemperature conditions and an
overvoltage-protection sense input (OVP) for overvoltage
protection. High-side current sensing combined with a
p-channel dimming MOSFET allow the positive terminal
of the LED string to be shorted to the positive input termi-
nal or to the negative input terminal without any damage.
This is a unique feature of the ICs.
Features
S
Boost, SEPIC, and Buck-Boost Single-Channel
LED Drivers
S
+5V to +65V Wide Input Voltage Range with a
Maximum 65V Boost Output
S
Integrated High-Side Current-Sense Amplifier
S
ICTRL Pin for Analog Dimming
S
Integrated High-Side pMOS Dimming MOSFET
Driver (Allows Single-Wire Connection to LEDs)
S
Programmable Operating Frequency (100kHz to
1MHz) with Synchronization Capability
S
Frequency Dithering for Spread-Spectrum
Applications (MAX16833/MAX16833C)
S
2% Accurate 1.64V Reference (MAX16833B/
MAX16833D)
S
Full-Scale, High-Side, Current-Sense Voltage of
200mV
S
Short-Circuit, Overvoltage, and Thermal
Protection
S
Fault Indicator Output
S
-40NC to +125NC Operating Temperature Range
S
Thermally Enhanced 5mm x 4.4mm, 16-Pin TSSOP
Package with Exposed Pad
Simplified Operating Circuit
6V TO 18V
WITH LOAD
DUMP UP
TO 70V
IN
NDRV
CS
PWMDIM
OVP
ISENSE+
PWMDIM
ISENSE-
DIMOUT
Applications
Automotive Exterior Lighting:
High-Beam/Low-Beam/Signal/Position Lights
Daytime Running Lights (DRLs)
Fog Light and Adaptive Front Light Assemblies
Commercial, Industrial, and Architectural
Lighting
PART
MAX16833AUE+
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
16 TSSOP-EP*
MAX16833
PGND
LED+
LED-
Ordering Information
FUNCTIONALITY
Frequency Dithering
Frequency Dithering
MAX DUTY CYCLE (%)
88.5
88.5
MAX16833AUE/V+
16 TSSOP-EP*
-40°C to +125°C
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
/V denotes an automotive qualified part.
Ordering Information continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5187; Rev 6; 8/13
MAX16833/MAX16833B–MAX16833D
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
ABSOLUTE MAXIMUM RATINGS
IN to PGND........................................................... -0.3V to +70V
ISENSE+, ISENSE-,
DIMOUT
to PGND................ -0.3V to +80V
DIMOUT
to ISENSE+...............................................-9V to +0.3V
ISENSE- to ISENSE+ ............................................-0.6V to +0.3V
PGND to SGND ....................................................-0.3V to +0.3V
V
CC
to PGND ..........................................................-0.3V to +9V
NDRV to PGND ........................................ -0.3V to (V
CC
+ 0.3V)
OVP, PWMDIM, COMP, LFRAMP, REF, ICTRL,
RT/SYNC,
FLT
to SGND ...................................-0.3V to +6.0V
CS to PGND .........................................................-0.3V to +6.0V
Continuous Current on IN ................................................100mA
Peak Current on NDRV ........................................................
Q3A
Continuous Current on NDRV .......................................
Q100mA
Short-Circuit Duration on V
CC
...................................Continuous
Continuous Power Dissipation (T
A
= +70NC)
16-Pin TSSOP (derate 26.1mW/NC above +70NC) .....2089mW
Operating Temperature Range ...................... -40NC to +125NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
16 TSSOP
Junction-to-Ambient Thermal Resistance (q
JA
) .......38.3°C/W
Junction-to-Case Thermal Resistance (q
JC
) .................3°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(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
SYSTEM SPECIFICATIONS
Operational Supply Voltage
Supply Current
Undervoltage Lockout (UVLO)
UVLO Hysteresis
Startup Delay
UVLO Falling Delay
V
CC
LDO REGULATOR
Regulator Output Voltage
Dropout Voltage
Short-Circuit Current
OSCILLATOR (RT/SYNC)
Switching Frequency Range
Bias Voltage at RT/SYNC
Maximum Duty Cycle
Oscillator Frequency Accuracy
f
SW
V
RT
D
MAX
V
CS
= 0V; MAX16833/MAX16833B only
V
CS
= 0V; MAX16833C/MAX16833D only
87.5
93
-5
100
1
88.5
94
89.5
95
+5
1000
kHz
V
%
%
V
CC
V
DOVCC
I
MAXVCC
0.1mA
P
I
VCC
P
50mA, 9V
P
V
IN
P
14V
14V
P
V
IN
P
65V, I
VCC
= 10mA
I
VCC
= 50mA, V
IN
= 5V
V
CC
= 0V, V
IN
= 5V
55
6.75
6.95
0.15
100
7.15
0.35
150
V
V
mA
t
START_DELAY
During power-up
t
FALL_DELAY
During power-down
V
IN
I
INQ
UVLOR
IN
UVLOF
IN
PWMDIM = 0, no switching
Switching
V
IN
rising
V
IN
falling, I
VCC
= 35mA
4.2
4.05
5
1.5
2.5
4.55
4.3
250
410
3.3
65
2.5
4
4.85
4.65
V
mA
V
mV
Fs
Fs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
Maxim Integrated
MAX16833/MAX16833B–MAX16833D
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
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
Synchronization Logic-High Input
Synchronization Frequency Range
SLOPE COMPENSATION
Slope Compensation
Current-Ramp Height
Charging Current
Discharging Current
Comparator High Trip Threshold
Comparator Low Trip Threshold
REFERENCE OUTPUT (REF) (MAX16833B/MAX16833D only)
Reference Output Voltage
ANALOG DIMMING (ICTRL)
Input-Bias Current
LED CURRENT-SENSE AMPLIFIER
ISENSE+ Input-Bias Current
ISENSE+ Input-Bias Current with
DIM Low
ISENSE- Input-Bias Current
Voltage Gain
V
ICTRL
= 1.4V
Current-Sense Voltage
Bandwidth
COMP
Transconductance
Open-Loop DC Gain
COMP Input Leakage
COMP Sink Current
COMP Source Current
PWM COMPARATOR
Input Offset Voltage
Leading-Edge Blanking
Propagation Delay to NDRV
CS LIMIT COMPARATOR
Current-Limit Threshold
CS Limit-Comparator
Propagation Delay to NDRV
Leading-Edge Blanking
Maxim Integrated
SYMBOL
V
IH-SYNC
f
SYNCIN
I
SLOPE
V
RT
rising
CONDITIONS
MIN
3.8
1.1f
SW
TYP
MAX
1.7f
SW
UNITS
V
Ramp peak current added to CS input
per switching cycle
V
LFRAMP
= 0V
V
LFRAMP
= 2.2V
46
50
54
FA
DITHERING RAMP GENERATOR (LFRAMP) (MAX16833/MAX16833C only)
80
80
100
100
2
V
RT
V
REF
IB
ICTRL
IB
ISENSE+
IB
ISENSE+OFF
IB
ISENSE-
I
REF
= 0 to 80FA
V
ICTRL
= 0.62V
V
ISENSE+
= 65V, V
ISENSE-
= 64.8V
V
ISENSE+
= 48V, V
ISENSE-
= 48V,
PWMDIM = 0
V
ISENSE+
= 65V, V
ISENSE-
= 64.8V
2
195
38.4
1.604
0
200
1.636
35
400
200
5
6.15
199
100
40
5
2100
-300
100
100
400
400
2
50
t
ON(MIN)
Includes leading-edge blanking time with
10mV overdrive
55
80
110
3500
75
+300
700
700
4900
41.4
MHz
FS
dB
nA
FA
FA
V
ns
ns
203
mV
V
SENSE
BW
GM
COMP
AV
OTA
I
LCOMP
I
SINK
I
SOURCE
V
OS-PWM
V
ICTRL
= 0.616V
V
ICTRL
= 0.2465V
AV
DC
- 3dB
8
1.669
200
700
120
120
FA
FA
V
V
V
nA
FA
FA
FA
V/V
V
CS_LIMIT
t
CS_PROP
10mV overdrive (excluding leading-edge
blanking time)
406
418
30
50
430
mV
ns
ns
3
MAX16833/MAX16833B–MAX16833D
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
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
GATE DRIVER (NDRV)
Peak Pullup Current
Peak Pulldown Current
Rise Time
Fall Time
R
DSON
Pulldown nMOS
PWM DIMMING (PWMDIM)
ON Threshold
Hysteresis
Pullup Resistance
PWMDIM to LED Turn-Off Time
PWMDIM to LED Turn-On Time
pMOS GATE DRIVER (DIMOUT)
Peak Pullup Current
Peak Pulldown Current
DIMOUT
Low Voltage with
Respect to V
ISENSE+
OVERVOLTAGE PROTECTION (OVP)
Threshold
Hysteresis
Input Leakage
SHORT-CIRCUIT HICCUP MODE
Short-Circuit Threshold
Hiccup Time
Delay in Short-Circuit Hiccup
Activation
BUCK-BOOST SHORT-CIRCUIT DETECT
Buck-Boost Short-Circuit
Threshold
Delay in
FLT
Assertion from
Buck-Boost Short-Circuit
Condition
Delay in
FLT
Deassertion After
Buck-Boost Short Circuit is
Removed (Consecutive Clock-
Cycle Count)
V
SHORT-BB
t
DEL-BB-SHRT
(V
ISENSE+
- V
IN
) falling, V
IN
= 12V
Counter increments only when
V
PWMDIM
> V
PWMON
Counter increments only when
V
PWMDIM
> V
PWMON
1.15
1.55
8192
1.9
V
Clock
Cycles
V
SHORT-HIC
(V
ISENSE+
- V
ISENSE-
) rising
t
HICCUP
285
298
8192
1
310
mV
Clock
Cycles
Fs
V
OVPOFF
V
OVPHY
I
LOVP
V
OVP
= 1.235V
-300
V
OVP
rising
1.19
1.225
70
+300
1.26
V
mV
nA
I
DIMOUTPU
I
DIMOUTPD
V
PWMDIM
= 0V,
V
ISENSE+
- V
DIMOUT
= 7V
V
ISENSE+
- V
DIMOUT
= 0V
25
10
-8.7
50
25
-7.4
80
45
-6.3
mA
mA
V
V
PWMON
V
PWMHY
R
PWMPU
PWMDIM falling edge to rising edge on
DIMOUT,
C
DIMOUT
= 7nF
PWMDIM rising edge to falling edge on
DIMOUT,
C
DIMOUT
= 7nF
1.7
1.19
1.225
70
3
2
3
4.5
1.26
V
mV
MI
Fs
Fs
I
NDRVPU
I
NDRVPD
t
r
t
f
R
NDRVON
V
CC
= 7V, V
NDRV
= 0V
V
CC
= 7V, V
NDRV
= 7V
C
NDRV
= 10nF
C
NDRV
= 10nF
V
COMP
= 0V, I
SINK
= 100mA
0.25
3
3
30
30
0.6
1.1
A
A
ns
ns
I
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
8192
Clock
Cycles
4
Maxim Integrated
MAX16833/MAX16833B–MAX16833D
High-Voltage HB LED Drivers with
Integrated High-Side Current Sense
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
OPEN-DRAIN FAULT (FLT)
Output Voltage Low
Output Leakage Current
THERMAL SHUTDOWN
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
Note 2:
All devices are 100% tested at T
A
= +25NC. Limits over temperature are guaranteed by design.
Temperature rising
+160
10
NC
NC
SYMBOL
V
OL-FLT
CONDITIONS
V
IN
= 4.75V, V
OVP
= 2V, and I
SINK
= 5mA
V
FLT
= 5V
MIN
TYP
40
MAX
200
1
UNITS
mV
FA
Typical Operating Characteristics
(V
IN
= +12V, C
VIN
= C
VCC
= 1FF, C
LFRAMP
/C
REF
= 0.1FF, T
A
= +25NC, unless otherwise noted.)
IN RISING/FALLING UVLO THRESHOLD
vs. TEMPERATURE
MAX16833 toc01
QUIESCENT CURRENT
vs. TEMPERATURE
MAX16833 toc02
QUIESCENT CURRENT vs. V
IN
V
PWMDIM
= 0V
V
IN
~ 4.6V
MAX16833 toc03
4.8
IN RISING/FALLING UVLO THRESHOLD (V)
4.7
4
2.5
2.0
1.5
1.0
0.5
0
V
PWMDIM
= 0V
QUIESCENT CURRENT (mA)
3
V
IN
RISING
4.6
4.5
4.4
4.3
4.2
-40
-15
10
35
60
85
2
V
IN
FALLING
1
0
110 125
-40
-15
10
35
60
85
110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
QUIESCENT CURRENT (mA)
1
10
V
IN
(V)
100
V
CC
vs. I
VCC
MAX16833 toc04
MAX16833 toc05
6.95
6.90
6.85
6.80
7.05
7.00
DIMOUT (WITH RESPECT TO ISENSE+) (V)
-6.7
-7.2
-7.7
-8.2
-8.7
V
CC
(V)
V
CC
(V)
6.95
6.90
6.85
6.80
6.75
0
5
10 15 20 25 30 35 40 45 50
I
VCC
(mA)
6.75
-40
-15
10
35
60
85
110 125
TEMPERATURE (°C)
-40
-15
10
35
60
85
110 125
TEMPERATURE (°C)
Maxim Integrated
MAX16833 toc06
7.00
V
CC
vs. TEMPERATURE
7.10
-6.2
DIMOUT (WITH RESPECT TO ISENSE+)
vs. TEMPERATURE
5
stm32/stm8
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