ON Semiconductor NCV7680-NCV3136EVB User Manual

NCV7680-NCV3136EVB
NCV7680-NCV3163
Evaluation Board
User's Manual
Description
The NCV7680 is an octal LED driver designed for
automotive LED rear combination lamps. External
programmability of the NCV7680 allows the user to set the
tail current and stop currents using a single resistor for each
function. An optional external FET is used to help distribute
power for high power systems.
The NCV7680−NCV3163 Evaluation Board includes
both an NCV7680 (octal driver) and NCV3163 (Boost
Regulator). The NCV3163 allows for an increased number
of LEDs per NCV7680 output by boosting the LED string
anode voltage. The DIAG pin is brought out for reporting of
open circuit conditions.
The LED's mounted on the evaluation board are jumpered
giving flexibility for evaluating customer defined loads.
Part Features
•
Constant Current Outputs for LED String Drive
•
Open LED String Diagnostic with Open-Drain Output
•
Low Dropout Operation for Pre-Regulator Applications
•
External Modulation Capable
•
On-chip 1 kHz Tail PWM Dimming
•
Single Resistor for Stop Current Set Point
•
Single Resistor for Tail Dimming Set Point
•
Overvoltage Set Back Power Limitation
•
AEC Q100 Qualified
•
16 Lead SOW Exposed Pad
•
These are Pb-Free Devices
Board Features
•
STOP Input Switch − Controls power to the circuit
•
DIAG Output − Open Circuits are Reported
•
LED Isolation − On-board LEDs can be Removed with
Jumpers for Alternative LED Evaluation
•
STOP Programming Current − Programming Resistor
can be Adjusted Externally by Jumper Removal
© Semiconductor Components Industries, LLC, 2014
June, 2014 − Rev. 1
EVAL BOARD USER'S MANUAL
•
External PWM Input
•
Adjustable Boost Circuit with Internal Switch − Set for
28 V on the NCV7680−NCV3163EVB Evaluation
Board
•
These Devices are Pb-Free and are RoHS Compliant
NOTE: For 100% Duty Cycle operation, connect the PWM
Input post to the VP post. The default setup (with
the 2 posts floating) yields 0% Duty Cycle.
Figure 1. NCV7680−NCV3163EVB Photo
1
http://onsemi.com
Publication Order Number:
EVBUM2245/D