MAX16836ASA+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX16836ASA+ ,High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V RegulatorELECTRICAL CHARACTERISTICS(V = V = +12V, C = 0.1µF to GND, I = 0, V = 0V, V = +4V, connect R = 0.58 ..
MAX16836ASA+ ,High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V RegulatorApplications 5mm x 5mm, 16-Pin TQFN Package and in 8-PinSO with Exposed Pad PackageAutomotive Inter ..
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MAX4477AUA ,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 ..
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MAX4477AUA+ ,SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS (continued)(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V ..
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MAX16836ASA+
High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator
General Description
The MAX16836 current regulator operates from a 6.5V
to 40V input-voltage range and delivers up to a total of
350mA to one or more strings of high-brightness LEDs
(HB LEDs). The output current of the MAX16836 is
adjusted by using an external current-sense resistor in
series with the LEDs. A dimming input allows wide-
range “pulsed” PWM operation. Wave-shaping circuitry
reduces EMI. The differential current-sense input
increases noise immunity. The MAX16836 is well suited
for applications requiring a high-voltage input and is
able to withstand automotive load-dump events up to
40V. An on-board pass element minimizes external
components while providing ±3.5% output-current
accuracy. Additional features include a 5V regulated
output and short-circuit and thermal protection.
The MAX16836 is available in a thermally enhanced,
5mm x 5mm, 16-pin TQFN package and in an 8-pin SO
package with exposed pad. The MAX16836 is specified
over the automotive -40°C to +125°C temperature range.
Applications
Automotive Interior: Map, Courtesy, and Cluster
Lighting
Automotive Exterior: Tail Lights and CHMSL
Emergency Vehicle Warning Lights
Navigation and Marine Indicators
General Lighting
Signage, Gasoline Canopies, Beacons
Features+6.5V to +40V Operating RangeAdjustable LED Current (35mA to 350mA)±3.5% LED Current AccuracyHigh-Voltage DIM Pin for Dimming InterfaceIntegrated Pass Element with Low-Dropout
Voltage (0.55V typ)+5V Regulated Output with 4mA Source
CapabilityParallel Operation for LED Current > 350mADifferential LED Current SenseLow Shutdown Supply Current (35µA typ)Low 200mV Current-Sense Reference Reduces
Power LossesWave-Shaped Edges Reduce Radiated EMI During
PWM DimmingThermal ShutdownOutput Short-Circuit ProtectionAvailable in Small, Thermally Enhanced,
5mm x 5mm, 16-Pin TQFN Package and in 8-Pin
SO with Exposed Pad Package-40°C to +125°C Operating Temperature Range
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Ordering Information
MAX16836OUTLEDs
RSENSE
0.1μF
+6.5V TO +40V
+5V REG
CS+
0.1μF
CS-DIM
PWM DIMMING
GND
Simplified Diagram
19-4029; Rev 2; 4/09
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
EVALUATION KIT
AVAILABLE
PARTTEMP RANGEPIN-PACKAGE
MAX16836ATE+-40°C to +125°C16 TQFN-EP*
MAX16836ASA+-40°C to +125°C8 SO-EP*1513
VIN
N.C.
GND
CS-
RSENSE
CS+
MAX16836
N.C.N.C.N.C.N.C.
OUTENDIMN.C.
OUT
VDIM
Typical Operating Circuit
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= VEN = +12V, CV5= 0.1µF to GND, IV5= 0, VCS-= 0V, VDIM= +4V, connect RSENSE= 0.58Ωbetween CS+ and CS-. = -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
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 obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, see /thermal-tutorial.
IN to GND...............................................................-0.3V to +45V
OUT, DIM, and EN to GND..........................-0.3V to (VIN+ 0.3V)
CS+, CS-, V5 to GND...............................................-0.3V to +6V
OUT Short Circuited to GND Duration
(at VIN= +16V).........................................................60 minutes
Maximum Current into Any Pin (except IN and OUT).........±20mA
Continuous Power Dissipation (TA= +70°C)
16-Pin TQFN 5mm x 5mm
(derate 33.3mW/°C above +70°C)............................2666.7mW
8-Pin SO (derate 23.3mW/°C above +70°C).............1860.5mW
Junction-to-Case Thermal Resistance (θJC)(Note 1)
8-Pin SO...........................................................................7°C/W
16-Pin TQFN.....................................................................2°C/W
Junction-to-Ambient Thermal Resistance (θJA)(Note 1)
8-Pin SO.........................................................................43°C/W
16-Pin TQFN...................................................................30°C/W
Operating Junction Temperature Range...........-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Voltage RangeVIN(Note 3)6.540.0V
Ground CurrentIGILOAD = 350mA1.283mA
Shutdown Supply CurrentISHDNVEN ≤ 0.6V3570µA
Guaranteed Output CurrentIOUTRSENSE = 0.55Ω350mA
Output Current Accuracy35mA < IOUT < 350mA±3.5%
IOUT = 350mA (current pulsed),
12V < VIN < 40V0.551.2
Dropout Voltage (Note 4)∆VDO
IOUT = 350mA (current pulsed),
6.5V < VIN < 12V0.551.5
Current rising, VDIM rising to 4V7.8Output Current Slew RateCurrent falling, VDIM falling to 0.6V7.8mA/µs
Short-Circuit CurrentVIN = 12V, VCS+ = 0V400500650mA
LOGIC INPUT
EN Input CurrentIEN-2.5-1.0-0.2µA
EN Input Voltage HighVIH2.8V
EN Input Voltage LowVIL0.6V
Turn-On TimetONVEN rising edge to 90% of OUT110350µs
CURRENT SENSE
Regulated RSENSE VoltageVSENSEVSENSE = VCS+ - VCS-193200207mV
CS- Voltage Range-0.3+4.1V
Input Current (CS+)VCS+ = 220mV2.77.0µA
Input Current (CS-)VCS+ = 220mV-5017.2µA
DIM Input Current-2.5-1.0-0.2µA
DIM Input Voltage HighVIH4V
DIM Input Voltage LowVIL0.6V
Turn-On TimetONAfter VDIM rising to 4V (Note 5)110µs
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Note 2:All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by
design.
Note 3:Resistors were added from OUT to CS+ to aid with the power dissipation during testing.
Note 4:Dropout is measured as follows:
Connect RO= 27Ωfrom OUT to CS+. Connect RSENSE= 0.58Ωfrom CS+ to CS-. Set VIN= +12V (record VOUTas VOUT1).
Reduce VINuntil VOUT= 0.97 x VOUT1(record as VIN2and VOUT2). ∆VDO= VIN2- VOUT2.
Note 5:tONtime includes the delay and the rise time needed for IOUTto reach 90% of its final value. tOFFtime is the time needed
for IOUTto drop below 10%. See the Typical Operating Characteristics. tONand tOFFare tested with 13Ωfrom OUT to CS+.
Note 6:Current regulation varies with V5 load (see the Typical Operating Characteristics).
Note 7:Thermal shutdown does not function if the output of the 5V reference is shorted to ground.
ELECTRICAL CHARACTERISTICS (continued)
(VIN= VEN = +12V, CV5= 0.1µF to GND, IV5= 0, VCS-= 0V, VDIM= +4V, connect RSENSE= 0.58Ωbetween CS+ and CS-. = -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
THERMAL OVERLOAD
Thermal-Shutdown Temperature+159°C
Thermal-Shutdown Hysteresis24°C
+5V REGULATOR
Output Voltage RegulationVV5(Note 6)4.855.005.20V
V5 Short-Circuit CurrentVV5 = 0V (Note 7)15mA
Typical Operating Characteristics
(VIN= VEN= +12V, TA= +25°C, unless otherwise noted.)
OUTPUT CURRENT
vs. TEMPERATURE
MAX16836 toc01
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
ILOAD = 350mA
ILOAD = 35mA
ILOAD = 200mA
ILOAD = 100mA
(VCS+ - VCS-)
vs. OUTPUT CURRENT
MAX16836 toc02
OUTPUT CURRENT (mA)
CS+
- V
CS-
) (V)
OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX16836 toc03
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)30510152025
040
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Typical Operating Characteristics (continued)
(VIN= VEN= +12V, TA= +25°C, unless otherwise noted.)
DROPOUT VOLTAGE
vs. TEMPERATURE
MAX16836 toc04
TEMPERATURE (°C)
DROPOUT VOLTAGE (V)
ILOAD = 350mA
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX16836 toc05
TEMPERATURE (°C)
SHUTDOWN CURRENT (
VIN = 40V
VIN = 20V
VIN = 12V
VIN = 6.5V
+5V REGULATOR OUTPUT
vs. TEMPERATURE
MAX16836 toc06
TEMPERATURE (°C)
+5V REGULATOR OUTPUT (V)
IV5 = 1mANO LOAD
IV5 = 5mA
(VCS+ - VCS-) vs. IV5
MAX16836 toc07
IV5 (mA)
CS+
- V
CS-
) (V)4321
ILOAD = 350mA
+5V REGULATOR OUTPUT vs. VIN
MAX16836 toc08
VIN (V)
+5V REGULATOR OUTPUT (V)3025201510
NO LOADIV5 = 5mA
IV5 = 5mA
200Hz DIMMED OPERATION
MAX16836 toc09
100μs/div
VDIM
2V/div
ILOAD
200mA/div
ILOAD = 350mA
VIN = VEN = 12V
DIM PULSED AT
200Hz (5%
DUTY CYCLE)
200Hz DIMMED OPERATION (EXPANDED)
MAX16836 toc10
20μs/div
VDIM
2V/div
ILOAD
200mA/div
ILOAD = 350mA
VIN = VEN = 12V
DIM PULSED AT
200Hz (50%
DUTY CYCLE)0V
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
200Hz DIMMED OPERATION (EXPANDED)
MAX16836 toc11
20μs/div
VDIM
2V/div
ILOAD
200mA/div
ILOAD = 350mA
VIN = VEN = 12V
DIM PULSED AT
200Hz (50%
DUTY CYCLE)
VSENSE vs. VCS-
MAX16836 toc12
VCS- (V)
SENSE
(mV)
ILOAD = 350mA
Typical Operating Characteristics (continued)
(VIN= VEN= +12V, TA= +25°C, unless otherwise noted.)
Pin Description
PIN
TQFNSONAMEFUNCTION
1, 168OUTCurrent-Regulated Output. Connect pin 1 to pin 16.
2, 31INPositive Input Supply. Bypass IN with a 0.1µF (min) capacitor to GND. Connect pin 2 to pin
4–8, 14—N.C.No Connection. Not internally connected.2CS+Positive Input of the Internal Differential Amplifier. Connect the current-sense resistor
between CS+ and CS- to program the output current level.3CS-Negative Input of the Internal Differential Amplifier. Connect the current-sense resistor
between CS- and CS+ to program the output current level.4V5+5V Regulated Output. Connect a 0.1µF capacitor from V5 to GND.5GNDGround6DIMPulsed Dimming Input. Drive DIM low to disable the output. Drive DIM high or leave
unconnected to enable the output.7ENEnable Input. Drive EN high to enable the output.EPExposed Pad. Connect to the ground plane for effective power dissipation. Do not use as
the only ground connection.
MAX16836
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Functional Diagram
MAX16836
ENABLEENREFERENCE
GENERATOR
REGULATORV5
DIFFERENTIAL
SENSE
AMPLIFIER
THERMAL
SHUTDOWN
DIM
I_REG
1μA
OUT
CS+
CS-
Detailed Description
The MAX16836 is a high-current regulator capable of
providing up to a total of 350mA of current to one or
more strings of HB LEDs. A wide operating input volt-
age range of +6.5V to +40V makes the MAX16836
ideal for automotive applications. A +5V regulated out-
put provides up to 4mA of current to power external cir-
cuitry. In addition, the MAX16836 features thermal and
output short-circuit protection. The wide operating volt-
age range helps protect the MAX16836 against large
transients such as those found in load-dump situations
up to 40V.
The MAX16836 uses a feedback loop to control the out-
put current. The differential voltage across the sense
resistor is compared to a fixed reference voltage, and
the error is amplified to serve as the drive to the internal
power series pass device (see the Functional
Diagram). The regulation point is factory-set at (VCS+-
VCS-) = 200mV ±3.5%. The regulated current is user
defined by the value of RSENSE.
The MAX16836 is a current controller internally opti-
mized for driving the impedance range expected from
one or more HB LEDs.
+5V Regulator
The MAX16836 includes a fixed +5V output regulator
that delivers up to 4mA of load current throughout the
+6.5V to +40V input voltage range. Connect a 0.1µF
compensation capacitor from V5 to ground.Shorting
V5 to ground disables the thermal shutdown. When EN
is low, V5 is off. V5 stays on during PWM dimming,
using the DIM input.
Thermal Protection
The MAX16836 enters a thermal-shutdown mode in the
event of overheating. This typically occurs in overload or
output short-circuit conditions. If the junction tempera-
ture exceeds TJ= +159°C (typ), the internal thermal-pro-
tection circuitry turns off the series pass device. The
MAX16836 recovers from thermal-shutdown mode once
the junction temperature drops by 24°C (typ). The part
therefore protects itself by thermally cycling in the event
of a short-circuit or overload condition.Shorting V5 to
ground disables the thermal shutdown.
Applications Information
Programming the LED Current
The MAX16836 uses a sense resistor across CS+ and
CS- to set the LED current. The differential sense ampli-
fier connected across RSENSE provides ground-loop
immunity and low-frequency noise rejection. The LED
current is given by:
ILED= VSENSE/RSENSE

Partno	Mfg	Dc	Qty	Available	Descript
MAX16836ASA+	MAIXM	N/a	1500	avai	High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator
MAX16836ASA+ \|MAX16836ASA	MAXIM	N/a	63	avai	High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator