Summary of Contents for ON Semiconductor NCV78763 LDM A REFERENCE DESIGN KIT
- Page 1 LED FRONTLIGHTING SOLUTIONS APG/AAB NCV78763 LDM A – REFERENCE DESIGN KIT QUICK START GUIDE & SYSTEM OVERVIEW Document version 1.6– 29 of Aug 2016 Christiam Gasparini System Application Engineer Automotive APG/AAB BU - Belgium Confidential...
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Page 2: Kit Overview
NCV78763 LDM A v1.1 Quick Start Guide KIT OVERVIEW 29/08/2016 Confidential... - Page 3 NCV78763 REF DES LDM A – KIT OVERVIEW • 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.
- Page 4 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. •...
- Page 5 NCV78763 REF DES LDM A & Bulb Systems Compatibility Body Light Control by SWITCHES / SMARTFETs Former Car Front Light Bulb System TURN Body Control Unit Each line is: Power + Control + Diagnostics (current feedback) Diagnostics is performed by current sensing in the ECU DRL + PL NCV78763...
- Page 6 NCV78763 LDM A v1.1 Quick Start Guide HW SETUP 29/08/2016 Confidential...
- Page 7 NCV78763 LDM A REF DES KIT: Main board LDM • 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.
- Page 8 NCV78763 LDM A REF DES KIT: the LDM Interface • 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. BUTTONS &...
- Page 9 NCV78763 LDM A REF DES KIT: Cabling & connections • 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): Four wires input connector (KIT ITEM C) Input 01 / DRL (RED wire &...
- Page 10 NCV78763 LDM A REF DES KIT: Power Supply and plug adapters • 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. 12V/3A light power supply – KIT ITEM D Flexible overall use wall socket adaptation (E.G.
- Page 11 NCV78763 LDM A REF DES KIT: Power LED Modules • 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.
- Page 12 NCV78763 LDM A REF DES KIT: the entire setup system • The connections of all previous elements brings to the following: 29/08/2016 Confidential...
- Page 13 NCV78763 LDM A REF DES KIT: The APRGM (optional) • The standard factory firmware is set to drive the default KIT LED modules, for 10W power in steady state (around 580mA DC current). Using a different LED string below 22V, the same current will be applied. •...
- Page 14 NCV78763 LDM A REF DES KIT: APRGM – Setup • In order to allow the current and LED strings programming procedure, the APRGM board, when the system is in power off, must first be plugged into the three LDM A main board connectors “P4” “S1” and “P5” (respectively CN1, CN2 and CN3 in APRGM).
- Page 15 NCV78763 LDM A REF DES KIT: APRGM – Procedure #1 • After setup, the LED current programming procedure is actually entered when, powering up the system, the button S3 is kept pressed. Details on the procedure are reported below. 1. When entering programming procedure, the LED DS1 will start blinking. Release button S3.
- Page 16 NCV78763 LDM A REF DES KIT: APRGM – Procedure #2 • Please refer to the following picture for a graphical explanation of the LED current setting programming procedure. Button S2: LED DS1: - Exit immediately without saving when programming procedure is running - User feedback (blink code) Trimmer P1 &...
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Page 17: System Overview
NCV78763 LDM A v1.1 System Overview Design 29/08/2016 Confidential... - Page 18 NCV78763 LDM A REF DES: PCB Board 3D Overview NCV78763 LDM A 3D image - PCB Size: 68mm xx 63mm 29/08/2016 Confidential...
- Page 19 NCV78763 LDM A REF DES: Schematics (top-level view) The LDM A REF DES v1.1 top level block schematics view is shown below: (A) INPUTS (POWER & SIGNALS) BODY CONTROLLER (B) REVERSE POLARITY PROTECTION (E) NCV78763 LED DRIVER DRL/PL LED STRING (C) MCU INPUTS INTERFACE DIAGNOSTIC OUTAGE TURN LED STRING...
- Page 20 NCV78763 LDM A REF DES: sub-circuit #B: reverse battery 29/08/2016 Confidential...
- Page 21 NCV78763 LDM A REF DES: sub-circuit #C: MCU interface 29/08/2016 Confidential...
- Page 22 NCV78763 LDM A REF DES: sub-circuit #D: MCU 29/08/2016 Confidential...
- Page 23 NCV78763 LDM A REF DES: sub-circuit #E: NCV78763 29/08/2016 Confidential...
- Page 24 NCV78763 LDM A REF DES: PCB (top side) 29/08/2016 Confidential...
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Page 25: Measurement Report
NCV78763 LDM A v1.1 System Overview Measurement Report 29/08/2016 Confidential... - Page 26 Measurement report: DRL ramp turn-on • At power on (line #1 = DRL input), the DRL led string is ramped to the nominal current value by combining analog and digital dimming (logarithmic mode is shown). 1: Analog dimming ramp phase (amplitude logarithmic increases) 2: Digital dimming ramp phase (duty cycle logarithmic increases) 3: Constant current phase DRL input turn ON...
- Page 27 System steady state stability (low VBAT = 7V) 29/08/2016 Confidential...
- Page 28 System steady state stability (nom VBAT = 13V) 29/08/2016 Confidential...
- Page 29 System steady state stability (nom VBAT = 19V) 29/08/2016 Confidential...
- Page 30 PSRR stability (VBAT = 10V >>> 20V) The LED current is not affected by harsh battery step-ups 29/08/2016 Confidential...
- Page 31 PSRR stability (VBAT = 20V >>> 10V) Also in case of heavy battery drops the LED current is not affected 29/08/2016 Confidential...
- Page 32 Diagnostic & specific input turn-off • In this diagnostic detection example, the output VLED is shorted to GND. • The module turns off the input to flag to the body controller the failure. Short circuit: VLED → 0V Programmed short circuit detection time Failing input is forced off by the related module switch (MCU keeps stand by) Current in the DRL string goes to zero...
- Page 33 ISO 7637 pulses (type 1) • The LDM A module is validated through the standard ISO 7637 pulses. For what concerns pulse type 1, it is shown how it correctly restarts normal operation at each pulse iteration. 29/08/2016 Confidential...
- Page 34 ISO 7637 pulses (type 1 - ZOOM) • The module correctly restarts normal operation at each pulse iteration. Note: No reset from the MCU. 29/08/2016 Confidential...
- Page 35 ISO 7637 pulses (type 2a) • Also in this case, the module correctly restarts normal operation at each pulse iteration. 29/08/2016 Confidential...
- Page 36 ISO 7637 pulses (type 3a) • The highest amplitude disturbance (-150V) does not minimally affect the module operation. 29/08/2016 Confidential...
- Page 37 ISO 7637 pulses (type 3b) • The highest disturbance (+150V) does not affect at all the module operation. 29/08/2016 Confidential...
- Page 38 EMC conducted emission CISPR25 Results obtained without EMC input filter (small X7R capacitor only used) 29/08/2016 Confidential...
- Page 39 LED FRONTLIGHTING SOLUTIONS AAB NCV78763 LDM A – QUICK START GUIDE - OVERVIEW Any question or advice? Our staff will be glad to provide all necessary information and collect your valuable inputs. Confidential...
- Page 40 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: ON Semiconductor NV78763RLA11GEVK...