ON Semiconductor NCV78763 LDM Installation Manual

Confidential

LED FRONTLIGHTING SOLUTIONS APG/AAB

NCV78763 LDM A – REFERENCE DESIGN KIT

QUICK START GUIDE & SYSTEM OVERVIEW

Document version 1.6– 29th of Aug 2016

Christiam Gasparini
System Application Engineer
Automotive APG/AAB BU - Belgium

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NCV78763 LDM A

v1.1

Quick Start Guide

KIT OVERVIEW

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• The NCV78763 REF Design LDM A KIT v1.1 is meant for Automotive LED

Front Lighting Advanced Applications for Day Time Running Light (DRL),
Position Light (PL) and Turn Indicator (TURN), aimed for car bulb
equivalent system replacement and migration to Power LEDS. Content:

NCV78763 REF DES LDM A – KIT OVERVIEW

(A) NCV78763 REF Design LDM A Board

(C) CABLING and INT Socket Adaptors

(E1) Power LED Module 01

(E2) Power LED Module 02

(B) LDM Interface connection

(D) Wall socket power supply

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NCV78763 REF DES LDM A – Main Features sheet

• The NCV78763 REF Design LDM A system solution is based on the
NCV78763 Power LED Driver for Front Lighting (APG/AAB BU), with a full
ONSEMI BOM portfolio for external power devices.

• The module features failure diagnostics as open load detection, short circuit
protection and thermal protection lock out. A low pin count 8-bit microcontroller
is embedded on board for such monitoring and control.

• The LED strings (DRL/PL) are driven according to advanced dimming control

techniques including logarithmic ramps analog and digital modulation for
enhanced human eye sensitivity smoothness perception. The implementation
fully exploits the SPI bus and LED Driver settings.

• Other key characteristics of the NCV78763 LDM A include: compact

electronics, compatibility target with automotive bulb architectures and
ONSEMI Platform design approach for:

a) Compatibility with a wide range of LED strings configuration without BOM change
b) Easily customizable to the specific system requirements.
c) Wide supply VBAT Operating range from 5V to 20V or higher.

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NCV78763 REF DES LDM A & Bulb Systems Compatibility

Body Control Unit

Each line is: Power + Control

+ Diagnostics (current feedback)

Body Control Unit

DRL

PL

TURN

LDM A Reference Design

NCV78763

ONSEMI BOM

DRL + PL

TURN

8-bit

MCU

Diagnostics is performed by
current sensing in the ECU

NCV78763 LDM A as Bulb to LED migration adaptor

The module inputs to outputs functionality is configurable via the embedded MCU

Former Car Front Light

Bulb System

NEW LED Front Lighting

System

Body Light Control by
SWITCHES / SMARTFETs

Migration via LDM adaptor

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NCV78763 LDM A

v1.1

Quick Start Guide

HW SETUP

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• The NCV78763 LDM A Board, core of the system, is shown hereby. Its BOM is
sized to allow the outputs to drive LED strings for a total power of above 20W
and up to 60V voltage.

• LED Chan 01 is dedicated to DRL and PL, controlled via logarithmic dimming

slopes ramp, while channel 02 performs the turn indicator (blinker) function.

NCV78763 LDM A REF DES KIT: Main board LDM

NCV78763 LDM A – REF Design

Board (KIT ITEM A)

Twice-Two wires output connectors:
Output 01: HOT/ANODE (RED)
Output 01: GND/CATHODE (BLACK)

Output 02: HOT/ANODE (RED)
Output 02: GND/CATHODE (BLACK)

Four ways input connector
Input 01: DRL
Input 02: PL
Input 03: TURN
Input 04: GND

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• The LDM REF Design A Interface (ITEM B) grants additional flexibility
for use of an wall socket power supply and allows straightforward
commands by the user via buttons and switch.

NCV78763 LDM A REF DES KIT: the LDM Interface

Plugs towards LDM A - four
wire input interface

Wall socket – Light power supply

LAB Bench power supply

BUTTONS & spy LEDS
1: LDM INPUT 02 / POSITION LIGHT / BLUE
2: LDM INPUT 01 / DRL / RED
3: LDM INPUT 03 / TURN / YELLOW

General “power available” LED

GND bar for oscilloscope probe(s)

SWITCH – PL/ DRL/OPEN

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• The NCV78763 LDM A KIT modules come equipped with cabling (KIT
ITEM C) for easy interface towards a standard bench power supply or

the official LDM REF Design A interface (KIT ITEM B):

NCV78763 LDM A REF DES KIT: Cabling & connections

Four wires input connector (KIT ITEM C)
Input 01 / DRL (RED wire & banana)

Input 02 / PL (BLUE wire & banana)

Input 03 / TURN (YELLOW wire & banana)
Input 04 / GND (BLACK wire & banana)

Twice-Two wires output connectors,

connected to LED modules:

Output 01: HOT/ANODE (RED)
Output 01: GND/CATHODE (BLACK)

Output 02: HOT/ANODE (RED)
Output 02: GND/CATHODE (BLACK)

NCV78763 LDM A – REF Des

Board (KIT ITEM A)

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• The provided power supply can be directly plugged in the LDM interface, in
absence of a bench power supply, or for highly portable ready-to-go demos.

NCV78763 LDM A REF DES KIT: Power Supply and plug adapters

12V/3A light power supply – KIT ITEM D

Flexible overall use wall socket

adaptation (E.G. EU/US plugs)

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• For reference and immediate use, the KIT contains commercial Automotive
LED Modules (Philips – GH1644). Two samples are available per KIT. The LED
plates are equipped a customized compact heatsink and cabling to be
plugged to the NCV78763 LDM A.

NCV78763 LDM A REF DES KIT: Power LED Modules

Power LED Modules – KIT ITEMS E1/E2

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• The connections of all previous elements brings to the following:

NCV78763 LDM A REF DES KIT: the entire setup system