MAX16835：High-Voltage, 350mA, Adjustable Linear High-Brightness LED Driver

350mA LED Driver Provides 3.5% Current Accuracy for Long LED Strings

The MAX16835 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 MAX16835 is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range "pulsed" dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16835 is well suited for applications requiring 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 MAX16835 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range.

Key Features

+6.5V to +40V Operating Range
Adjustable LED Current (35mA to 350mA)
±3.5% Output Current Accuracy
Integrated Pass Element with Low-Dropout Voltage (0.55V typ)
Output Short-Circuit Protection
+5V Regulated Output with 4mA Source Capability
Thermal Shutdown
Differential LED Current Sense
High-Voltage Enable Pin for Dimming Interface
Low Shutdown Supply Current (35µA typ)
Low 200mV Current-Sense Reference Reduces Power Losses
Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
-40°C to +125°C Operating Temperature Range

MAX16835: Simplified Diagram

Applications/Uses

Automotive Interior: Map, Courtesy, and Cluster Lighting
Automotive Exterior: Tail Lights and CHMSL
Warning Lights for Emergency Vehicles
Navigation and Marine Indicators
General Illumination
Signage, Gasoline Canopies, Beacons

DataSheet

title	Download file
MAX16835 Data Sheet	MAX16835.pdf

Parametrics

Part Number	Regulation Topology	Max. No. of LEDs	LED Channels	LED Configuration	I_LED per Channel (A)	PWM Dimming Freq. (kHz)	Dimming Ratio	Dimming Control	V_DROPOUT (mV)	V_{CURR_SENSE} (mV)	P_OUT (W)	V_IN (V)	V_IN (V)	I_CC (mA)	LED String Volt. (V)	Package/Pins	Budgetary Price
Part Number	Regulation Topology	Max. No. of LEDs	LED Channels	LED Configuration	max	max	max	Dimming Control	typ	V_{CURR_SENSE} (mV)	P_OUT (W)	min	max	max	max	Package/Pins	See Notes
MAX16835	Linear	10	1	Series	0.35	1	200	PWM	550	200	14	6.5	40	3	38.6	TQFN/16	$1.36 @1k

Design kits & evaluation modules

MAX16836EVKIT

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX16835ATE+	Active		TQFN,;16 pin;26 mm²	-40°C to +125°C	Lead Free
MAX16835ATE+T	Active		TQFN,;16 pin;26 mm²	-40°C to +125°C	Lead Free

MAX16835.pdf MAX16835