NCV7680: LED Driver for Automotive LED Rear Combination Lamps

The NCV7680 consists of eight linear programmable constant current sources. The part is designed for use in the regulation and control of LED based Rear Combination Lamps for automotive applications. System design with the NCV7680 allows for two brightness levels, one for stop and one for tail illumination, or optional PWM control can also be implemented. Discrete LED brightness levels are easily programmed (stop current value, tail duty cycle value) optional external ballast FET allows for power distribution on designs requiring high currents. Set back power limit reduces the drive current during overvoltage conditions. This is most useful for low current applications when no external FET is used.

Features

Constant Current Outputs for LED String Drive
LED Drive Current up to 75mA per Channel
Open LED String Diagnostic with Open-Drain Output
Slew Rate Control
Low Dropout Operation
External Modulation Capable
On-chip 1 kHz Tail PWM Dimming
Stop Current Set Point programmability
Tail Dimming Set Point programmability
Overvoltage Set Back Power Limitation
Pb-Free

Benefits

LED devices are best controlled with current drive due to their exponential voltage characteristics
Sufficient drive for most popular low current LED devices
System functionality back to the microprocessor
Eliminates EMI concerns
Maintains functionality during drops in automotive battery voltage
Flexible for many system operation setups
Simplifies system design.
Easy programmability with one resistor
Easy programmability with one resistor
Keeps IC temperature lower at extended voltage range.
Meets lead free regulations

Applications

Automotive Rear Combination Lamps
Daytime Running Lights
Fog Lights
Center High Mounted Stop Lamps
Turn Signal and Other Externally Modulated Applications
LCD Backlighting

End Products

Lighting Module

Package Drawings (1)

Document Title	Document ID/Size	Revision
SOIC-16 Wide Body, Exposed Pad	751AG (37.6kB)	B

Application Notes (1)

Document Title	Document ID/Size	Revision	Revision Date
NCV7680 LED Driver Linear Regulator Performance	AND8450/D (80kB)	2	Jun, 2014

Simulation Models (2)

Document Title	Document ID/Size	Revision	Revision Date
BC547B PSPICE model	BC547B_NCV7680_PSPICE_MODEL_FILE (0.0kB)	0
NCV7680 PSPICE MODEL	NCV7680_PSPICE_MODEL (64.0kB)	0

Evaluation Board Documents (14)

Document Title	Document ID/Size	Revision	Revision Date
NCV7680-NCV3163 Evaluation Board User's Manual	EVBUM2245/D (216kB)	1	Jun, 2014
NCV7680PWGEVB Bill of Materials ROHS Compliant	NCV7680BOM/D (198.0kB)	1
NCV7680PWGEVB Gerber Layout Files (Zip Format)	NCV7680GGBR/D (41.0kB)	0
NCV7680PWGEVB Manual	NCV7680EVB/D (886.0kB)	3
NCV7680PWGEVB Schematic	NCV7680SCH/D (240.0kB)	0
NCV7680PWGEVB Test Procedure	NCV7680TP/D (11.0kB)	0
NCV7680PWR2GEVB Bill of Materials	NCV7680PWR2GEVB_BOM_ROHS.PDF (158.0kB)	0
NCV7680PWR2GEVB Gerber Layout Files (Zip Format)	NCV7680PWR2GEVB_GERBER.ZIP (300.0kB)	0
NCV7680PWR2GEVB Schematic	NCV7680PWR2GEVB_SCHEMATIC.PDF (386.0kB)	0
NCV7680PWR2GEVB Test Procedure	NCV7680PWR2GEVB_TEST_PROCEDURE.PDF (10.0kB)	4
NCV7680_NCV3163EVB Bill of Materials ROHS Compliant	NCV7680_NCV3163BOM/D (122.0kB)	1
NCV7680_NCV3163EVB Gerber Layout Files (Zip Format)	NCV7680_NCV3163GBR/D (300.0kB)	B
NCV7680_NCV3163EVB Schematic	NCV7680_NCV3163SCH/D (184.0kB)	1
NCV7680_NCV3163EVB Test Procedure	NCV7680_NCV3163TP/D (10.0kB)	4