QuickView - MAX16803 High-Voltage, 350mA, High-Brightness LED Driver with PWM Dimming and 5V Regulator

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The MAX16803 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 MAX16803 is adjusted by using an external current-sense resistor in series with the LEDs. A dimming input allows widerange "pulsed" PWM operation. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16803 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 MAX16803 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

Applications/Uses

+6.5V to +40V Operating Range
Adjustable LED Current (35mA to 350mA)
±3.5% LED Current Accuracy
High-Voltage DIM Pin for Dimming Interface
Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
+5V Regulated Output with 4mA Source Capability
Parallel Operation for LED Current > 350mA
Differential LED Current Sense
Low Shutdown Supply Current (12µA typ)
Low 204mV Current-Sense Reference Reduces Power Losses
Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
Thermal Shutdown
Output Short-Circuit Protection
Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
-40°C to +125°C Operating Temperature Range

	Automotive Exterior: Rear Combination Lights (RCL)
	Automotive Interior: Map, Courtesy, and Cluster Lighting
	Emergency Vehicle Warning Lights
	General Lighting
	Navigation and Marine Indicators
	Signage, Gasoline Canopies, Beacons

Key Specifications: High Brightness LED Drivers

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Extended V_IN with External Bias

Number of LED Channels

I_LED per Channel (max) (A)

LED String Voltage (max)

Internal Power MOSFETs

PWM Dimming Frequency (max) (kHz)

PWM Dimming Ratio (max)

EV-Kit

Price^**

MAX16803

Linear Current Regulator

6.5

1
1

0.35

Vin-1.4V

Yes

1:200

Yes

$1.04 @ 1k

See All High Brightness LED Drivers (29)

Key Specifications: White LED Drivers

Part Number

Topology

Max. No. of LEDs

Configuration

Dimming Control

V_DROPOUT (typ) (mV)

V_{CURR_SENSE} (mV)

P_OUT (W)

I_MAX per LED (mA)

Min. V_IN (V)

Max. V_IN (V)

I_CC (max) (mA)

Max. V_OUT (V)

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX16803

Linear Current Regulator

100

Series-Parallel

PWM

0.5

200

350

6.5

1.4

TQFN/16

$1.04 @ 1k

See All White LED Drivers (46)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.