MAX16832AASA+T ,2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current SenseElectrical Characteristics(V = +24V, V = V , T = T = -40°C to +125°C, unless otherwise noted. Typic ..
MAX16832CASA+ ,2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Senseapplications.• ±3% LED Current AccuracyThe MAX16832A/MAX16832C operate from a +6.5V to• Selectable ..
MAX16833CAUE/V+T ,High-Voltage HB LED Drivers with Integrated High-Side Current SenseFeaturesThe MAX16833, MAX16833B, MAX16833C, MAX16833D, ● Integration Minimizes BOM for High-Brightn ..
MAX16833EAUE/V+T ,High-Voltage HB LED Drivers with Integrated High-Side Current SenseApplicationsIN NDRV● Automotive Exterior Lighting: CSMAX16833 High-Beam/Low-Beam/Signal/Position L ..
MAX16834ATP+ ,High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET DriverApplications REFIDIM• Single-String LED LCD BacklightingPGND SENSE+• Automotive Rear and Front Ligh ..
MAX16834ATP+T ,High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET DriverFeaturesThe MAX16834 is a current-mode high-brightness LED• Integration Minimizes BOM for High-Brig ..
MAX4475ASA ,SOT23 / Low-Noise / Low-Distortion / Wide-Band / Rail-to-Rail Op AmpsApplications Available in Space-Saving SOT23, µMAX, andTSSOP PackagesADC BuffersDAC Output Amplif ..
MAX4475ASA+ ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V , T = -40°C ..
MAX4475ATT+ ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsFeatures♦ Low Input Voltage-Noise Density: 4.5nV/√HzThe MAX4475–MAX4478/MAX4488/MAX4489 wide-band, ..
MAX4475AUA+ ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsApplicationsOrdering InformationADC BuffersPIN- TOPDAC Output AmplifiersPART TEMP RANGEPACKAGE MARK ..
MAX4475AUT#TG16 ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V , T = -40°C ..
MAX4475AUT+T ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V , T = -40°C ..
MAX16832AASA+-MAX16832AASA+T-MAX16832CASA+
2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current SenseEVALUATION KIT AVAILABLE
General DescriptionThe MAX16832A/MAX16832C step-down constant-cur-
rent high-brightness LED (HB LED) drivers provide a
cost-effective design solution for automotive
interior/exterior lighting, architectural and ambient light-
ing, LED bulbs, and other LED illumination applications.
The MAX16832A/MAX16832C operate from a +6.5V to
+65V input voltage range and can provide an output
current up to 700mA, if operated up to a temperature of
+125°C, or up to a 1A if operated up to a temperature
of +105°C. A high-side current-sense resistor adjusts
the output current, and a dedicated pulse-width modu-
lation (PWM) input enables pulsed LED dimming over a
wide range of brightness levels.
These devices are well suited for applications requiring
a wide input voltage range. The high-side current sens-
ing and an integrated current-setting circuitry minimize
the number of external components while delivering an
average output current with ±3% accuracy. A hysteretic
control method ensures excellent input supply rejection
and fast response during load transients and PWM dim-
ming. The MAX16832A allows 10% current ripple, and
the MAX16832C allows 30% current ripple. Both
devices operate up to a 2MHz switching frequency,
thus allowing the use of small-sized components.
The MAX16832A/MAX16832C offer an analog dimming
feature that reduces the output current by applying an
external DC voltage below the internal 2V threshold volt-
age from TEMP_I to GND. TEMP_I also sources 25µA to
a negative temperature coefficient (NTC) thermistor con-
nected between TEMP_I and GND, thus providing an
analog thermal-foldback feature that reduces the LED
current when the temperature of the LED string exceeds
a specified temperature point. Additional features
include thermal-shutdown protection.
The MAX16832A/MAX16832C operate over the -40°C to
+125°C automotive temperature range and are available
in a thermally enhanced 8-pin SO package.
ApplicationsArchitectural, Industrial, and Ambient LightingAutomotive RCL, DRL, and Fog LightsHeads-Up DisplaysIndicator and Emergency LightingPoE Powered Lighting
Benefits and FeaturesCost-Effective Solution for a Wide Range of LED
Lighting Applications6.5V to 65V Input Voltage RangeOutput Current Up to 1A±3% LED Current AccuracySelectable Dimming Options: Linear or PWMMinimal Component Count Saves Cost and SpaceOn-Board 65V, 0.45ΩPower MOSFETResistor-Programmable Constant LED CurrentIntegrated High-Side Current Sense with 200mV
Current-Sense ReferenceHysteretic Control: Up to 2MHz Switching
FrequencyProtection Features and Wide Operating
Temperature Range Improves Lighting Fixture
ReliabilityThermal-Foldback Protection Dims LEDs to
Minimize OverheatingThermal-Shutdown ProtectionAvailable in a Thermally Enhanced 8-Pin SO PackageOperation over -40°C to +125°C Temperature RangePGND
TEMP_I
DIMIN
GND
MAX16832A
MAX16832C
OFF
HB LEDs
NTC*
*OPTIONAL
RSENSE
VIN
Typical Application Circuit
Ordering Information and Pin Configuration appear at end
of data sheet.
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current Sense
Absolute Maximum Ratings
Electrical Characteristics(VIN= +24V, VDIM= VIN, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.)
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.
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.
IN, CS, LX, DIM to GND.........................................-0.3V to +70V
TEMP_I to GND .......................................................-0.3V to +6V
PGND to GND ......................................................-0.3V to +0.3V
CS to IN.................................................................-0.3V to +0.3V
Maximum Current into Any Pin
(except IN, LX, and PGND).............................................20mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SO (derate 18.9mW/°C above +70°C)...........1509.4mW
Operating Temperature Range
700mA (max) Output Current........................-40°C to +125°C
1A (max) Output Current...............................-40°C to +105°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Soldering (reflow).............................................................+260°C
Lead Temperature (soldering, 10s).................................+300°C
Pin-to-Pin ESD Ratings......................................................±2.5kV
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSInput Voltage RangeVIN6.565V
Ground CurrentNo switching1.5mA
Supply CurrentVDIM < 0.6V, VIN = 12V350µA
UNDERVOLTAGE LOCKOUT (UVLO)VCS = VIN - 100mV, VIN rising until VLX <
0.5VIN6.256.5
Undervoltage LockoutUVLO
VCS = VIN - 100mV, VIN falling until VLX >
0.5VIN6.0
Undervoltage-Lockout Hysteresis0.5V
SENSE COMPARATORMAX16832A, VIN - VCS rising from 140mV
until VLX > 0.5VIN, VDIM = 5V197205213
Sense Voltage Threshold HighVSNSHIMAX16832C, VIN - VCS rising from 140mV
until VLX > 0.5VIN, VDIM = 5V218230236
MAX16832A, VIN - VCS falling from 260mV
until VLX < 0.5VIN , VDIM = 5V185190198
Sense Voltage Threshold LowVSNSLOMAX16832C, VIN - VCS falling from 260mV
until VLX < 0.5VIN, VDIM = 5V166170180
Propagation Delay to Output HightDPDHFalling edge of VIN - VCS from 140mV to
260mV to VLX > 0.5VIN50ns
Propagation Delay to Output LowtDPDLRising edge of VCS - VIN from 260mV to
140mV to VLX < 0.5VIN50ns
CS Input CurrentICSINVIN - VCS = 200mV, VIN = VCS3.5µA
Package Thermal Characteristics (Note 1)SO-EP
Junction-to-Ambient Thermal Resistance (θJA)...............+53°C/W
Junction-to-Case Thermal Resistance (θJC)......................+5°C/W
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current Sense
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
INTERNAL MOSFETVIN = VDIM = 24V, VCS = 23.9V,
ILX = 700mA0.450.9
Drain-to-Source ResistanceRDSONVIN = VDIM = 6.0V, VCS = 5.9V,
ILX = 700mA12
LX Leakage CurrentILX_LEAKVDIM = 0V, VLX = 65V10µA
DIM INPUTDIM Input-Voltage HighVIHVIN - VCS = 100mV2.8V
DIM Input-Voltage LowVILVCS - VIN = 100mV0.6V
DIM Turn-On TimetDIM_ONVDIM rising edge to VLX < 0.5VIN60ns
DIM Input Leakage HighVDIM = VIN815µA
DIM Input Leakage LowVDIM = 0V-3-1.50µA
THERMAL SHUTDOWNThermal-Shutdown ThresholdTemperature rising+165oC
Thermal-Shutdown Threshold
Hysteresis10oC
THERMAL FOLDBACKThermal-Foldback Enable
Threshold VoltageVTFB_ONVDIM = 5V1.92.02.12V
Thermal-Foldback SlopeFBSLOPEVDIM = 5V0.751/V
TEMP_I Output Bias CurrentITEMP_ITA = +25 oC2526.528µA
Electrical Characteristics (continued)(VIN= +24V, VDIM= VIN, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.)
EFFICIENCY
vs. INPUT VOLTAGEMAX16832A toc01
VIN (V)
EFFICIENCY (%)45352515
1 LED
3 LEDs5 LEDs7 LEDs9 LEDs11 LEDs13 LEDs15 LEDs
9 LEDs
DUTY CYCLE
vs. INPUT VOLTAGEMAX16832A toc02
VIN (V)
DUTY CYCLE (%)45352515
1 LED
3 LEDs
5 LEDs
7 LEDs
15 LEDs
13 LEDs
11 LEDs
FREQUENCY
vs. INPUT VOLTAGEMAX16832A toc03
VIN (V)
FREQUENCY (kHz)45352515
1 LED
3 LEDs
5 LEDs
7 LEDs
9 LEDs
11 LEDs
13 LEDs15 LEDs
16 LEDs
Typical Operating Characteristics(VIN= VDIM= 48V, RSENSE= 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at TA= +25°C, unless otherwise
noted.)
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current Sense
NORMALIZED ILED CURRENT
vs. INPUT VOLTAGEMAX16832A toc04
VIN (V)
NORMALIZED I
LED
CURRENT555045403530252015105065
1 LED3 LEDs5 LEDs7 LEDs9 LEDs11 LEDs13 LEDs15 LEDs
QUIESCENT CURRENT
vs. INPUT VOLTAGEMAX16832A toc05
VIN (V)
QUIESCENT CURRENT (554550152025303540510
VDIM = 0V
PWM DIMMING
AT 200Hz (10% DUTY CYCLE)MAX16832A toc06
1ms/div
ILED
200mA/div
VDIM
5V/div
VIN = 48V
8 LEDs
PWM DIMMING
AT 200Hz (90% DUTY CYCLE )MAX16822A toc07
1ms/div
ILED
200mA/div
VDIM
5V/divVIN = 48V
8 LEDs
PWM DIMMING
AT 20kHz (90% DUTY CYCLE)MAX16832A toc08
10µs/div
ILED
200mA/div
VDIM
5V/divVIN = 48V
8 LEDs
LED CURRENT
vs. VTEMP_IMAX16832A toc09
VTEMP_I (V)
LED CURRENT (mA)
ILED
vs. TEMPERATURE
MAX16832A toc10
TEMPERATURE (°C)
ILED
(A)
VIN = 48V
Typical Operating Characteristics (continued)(VIN= VDIM= 48V, RSENSE= 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at TA= +25°C, unless otherwise
noted.)
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current Sense
LXRDSON
vs. TEMPERATUREMAX16832A toc11
TEMPERATURE (°C)
RDSON
VIN = 6.5V
VIN = 65V
VIN = 48V
ITEMP_I
vs. TEMPERATUREMAX16832A toc12
ITEMP_I
TEMPERATURE (°C)
VIN = 48V
Typical Operating Characteristics (continued)(VIN= VDIM= 48V, RSENSE= 0.3Ω, L = 220µH (connected between IN and CS). Typical values are at TA= +25°C, unless otherwise
noted.)
Pin Description
PINNAMEFUNCTIONCSCurrent-Sense Input. Connect a resistor between IN and CS to program the LED current.INPositive Supply Voltage Input. Bypass with a 1µF or higher value capacitor to GND.GNDGroundPGNDPower Ground
5, 6LXSwitching NodeDIMLogic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to
enable the current regulator.TEMP_IThermal Foldback Control and Linear Dimming Input. Bypass with a 0.01µF capacitor to GND if
thermal foldback or analog dimming is used. See the Thermal Foldback section.
—EPExposed Pad. Connect EP to a large-area ground plane for effective power dissipation. Do not use
as the IC ground connection.
Detailed DescriptionThe MAX16832A/MAX16832C are step-down, constant-
current, HB LED drivers. These devices operate from a
+6.5V to +65V input voltage range. The maximum output
is 1A, if the part is used at temperatures up to TA=
+105°C, or 700mA, if it is used up to TA= +125°C. A
high-side current-sense resistor sets the output current
and a dedicated PWM dimming input enables pulsed
LED dimming over a wide range of brightness levels.
A high-side current-sensing scheme and an on-board
current-setting circuitry minimize the number of exter-
nal components while delivering LED current with ±3%
accuracy, using a 1% sense resistor. See Figure 1 for a
functional diagram.
MAX16832A/MAX16832C2MHz, High-Brightness LED Drivers
with Integrated MOSFET and
High-Side Current Sense
VCC
REGULATOR
OPEN LED
COMPARATORLX
DIM
TEMP_I
VTFB_ON
PGND
GND
CURRENT-SENSE
COMPARATOR
PWM
DIMMING
0.45Ω, 65V
nMOS SWITCH
UVLO
COMPARATOR
THERMAL
FOLDBACK
COMPARATOR
BANDGAP
REF
DIM
BUFFER
VCC _ANA
VCC _ANA
VCC _ANA
ISET
25µA
1.23V
GATE
DRIVER
MAX16832A
MAX16832C
Figure 1. Functional Diagram
