MAX16825：High-Voltage, Three-Channel Linear High-Brightness LED Drivers

Independently Dimmable, Three-Channel LED Drivers for Compact and Simple Driver Circuits

The MAX16824/MAX16825 three-channel LED drivers operate over a 6.5V to 28V input voltage range. These devices provide three open-drain constant-current-sinking outputs that are rated to 36V and deliver up to 150mA of current to each string of high-brightness LEDs (HB LEDs). The current at each output is programmable by means of an external current-sense resistor. The MAX16824 features three PWM inputs that control the duty cycle of the output current, allowing a wide LED dimming range to be implemented. The PWM inputs also function as on/off control for each corresponding output. The MAX16825 offers a 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The serial interface allows a microcontroller to configure the output channels using four inputs (DIN, CLK, LE, active-low OE) and a data output (DOUT). DOUT allows multiple drivers to be cascaded and operated together. The MAX16824/MAX16825's on-board pass elements minimize the need for external components, while at the same time, providing ±5% LED current accuracy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection. The MAX16824/MAX16825 are available in a thermally enhanced 16-pin TSSOP-EP package and specified over the -40°C to +125°C temperature range.

Key Features

6.5V to 28V Operating Range
Outputs Connected to 36V Supply for Long LED Strings
Three 36V-Rated Output Channels with Independently Adjustable LED Current
150mA Output Current Per Channel
±5% LED Current Accuracy
PWM Dimming
- Three Independent Dimming Control Inputs (MAX16824)
- 4-Wire Serial Interface LED Current Chopping (MAX16825)
+5V (±5%) Regulated Output with 4mA Source Capability
Fast Transient Dimming Response
200mV Current-Sense Reference Reduces Power Loss
Thermal Shutdown
-40°C to +125°C Operating Temperature Range
Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package

MAX16824, MAX16825: Typical Operating Circuit

Applications/Uses

Architectural and Decorative Lighting
Automotive Lighting
Indoor and Outdoor LED Video Displays
Industrial Lighting
LCD Display Backlighting
Mood Lighting

DataSheet

title	Download file
MAX16824-MAX16825 Data Sheet	MAX16824-MAX16825.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
MAX16824	Linear	9	3	Series-Parallel	0.15	3	200	PWM	750	200	15	6.5	28	10	38.6	TSSOP-EP/16	$1.70 @1k
MAX16825	Linear	9	3	Series-Parallel	0.15	3	200	SPI Serial	750	200	15	6.5	28	10	38.6	TSSOP-EP/16	$1.42 @1k

Design kits & evaluation modules

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX16825AUE+	Active		TSSOP-EP,;16 pin;33.2 mm²	-40°C to +125°C	Lead Free
MAX16825AUE+T	Active		TSSOP;	-40°C to +125°C	See data sheet

MAX16824-MAX16825.pdf MAX16825

MAX16824-MAX16825_cn.pdf MAX16825