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reference designNCV7685 | Demoboard STR-NCV7685-AUTO-GEVB

Onsemi NCV7685 | Demoboard STR-NCV7685-AUTO-GEVB

12 Channels 60 mA LED Linear Current Driver I2C Controllable for Automotive Applications

Overview

TopologyBuck Converter
IC revision2

Description

The NCV7685 consists of twelve linear programmable constant current sources with common reference. The part is designed for use in the regulation and control of LED for automotive applications. The NCV7685 allows 128 different duty cycle levels adjustable using pulse width modulation (PWM) independently for each output channel programmable via I2C serial interface. PWM frequency can be chosen in four different configurations up to 1200 Hz. The device can be used with micro−controller applications using the I2C bus or in stand−alone applications where a choice could be done in between 2 different static configuration settings. The IC also provides 3.3 V voltage reference to the application for loads up to 1 mA. LED brightness level is easily programmed using an external resistor. Each channel has an internal circuitry to detect open−load conditions with an optional auto−recovery mode. If one driver is in open−load condition, all other channels could be turned off according to the programmable bit setting. The device is available in small body size SSOP24−EP package.

Features

  • 12 Common Current Programmable Sources up to 60 mA
  • Independent PWM Duty Cycle Control for each Channel via PC
  • Common PWM Duty Cycle Control via I2C
  • On−Chip 150, 300, 600 and 1200 Hz PWM
  • Open LED String Diagnostics
  • Low Dropout Operation for Pre−Regulator Applications
  • Single Resistor for Current Set Point
  • Voltage Reference 3.3 V/1 mA
  • 8 Bits I2C Interface with CRC8 Error Detection
  • OTP Bank for Stand−Alone Operation (2 Configurations)
  • Output Enable Pin
  • Detection and Protection Against Open Load and Under−Voltage
  • Over Temperature Detection and Protection
  • Low Emission with Spread Spectrum Oscillator
  • NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
  • SSOP24−EP Packaging

Typical applications

  • Entry Level LED Tail Lights. NCV7685 used without MCU, Option Level LED Tail Lights with Sequential Turn Indicator. NCV7685 controlled by Low End MCU, High End Pixelized LED Tail Light with Full Animation Capabilities
  • RGB LED driver (4 x RGB per NCV7685)
  • Dashboard Applications
  • Turn Signal and Other Externally Modulated Applications

More information

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)		ToTiL
(µH)		IR,40K
(A)		ISAT,10%
(A)		ISAT,30%
(A)		RDC max.
(mΩ)		fres
(MHz)		MountλDom typ.
(nm)		Emitting ColorλPeak typ.
(nm)		ΦV typ.
(lm)		IV typ.
(mcd)		VF typ.
(V)		Chip Technology2θ50% typ.
(°)		SizeZ @ 100 MHz
(Ω)		Zmax
(Ω)		RDC
(Ω)		IR
(A)		Working Voltage
(V (AC))		IRP,40K
(A)		VersionSW
(mm)		Flammability RatingApplicationInterface TypeH
(mm)		Operation Force (Value)
(g)		Electrical Life
(Cycles)		Actuator ColorVaporphase processPinsRowsGenderTypeIR
(mA)		Packaging Samples
150060RS75000SPEC
25 files

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WL-SMCW SMT Mono-color Chip LED Waterclear 1.6 – – – – – – – – SMT 625 Red 630 – 250 2 AlInGaP 140 0603 – – – – – – – – – – – 0.7 – – – – – – – – – Tape and Reel
150060YS75000SPEC
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WL-SMCW SMT Mono-color Chip LED Waterclear 1.6 – – – – – – – – SMT 590 Yellow 595 – 120 2 AlInGaP 140 0603 – – – – – – – – – – – 0.7 – – – – – – – – – Tape and Reel
150060GS75000SPEC
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WL-SMCW SMT Mono-color Chip LED Waterclear 1.6 – – – – – – – – SMT 525 Green 515 – 430 3.2 InGaN 140 0603 – – – – – – – – – – – 0.7 – – – – – – – – – Tape and Reel
150060BS75000SPEC
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WL-SMCW SMT Mono-color Chip LED Waterclear 1.6 – – – – – – – – SMT 470 Blue 465 – 145 3.2 InGaN 140 0603 – – – – – – – – – – – 0.7 – – – – – – – – – Tape and Reel
782853221SPEC
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WE-CBA SMT EMI Suppression Ferrite Bead 2 – – – – – – – – SMT – – – – – – – – 0805 220 290 0.05 – – – SMT – – – – 0.9 – – – – – – – High Current 2000 –
78438335220SPEC
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WE-MAIA SMT Power Inductor 3 – – 22 0.85 1.1 2 1040 12 SMT – – – – – – – – 3015 – – – – – – SMT – – – – 1.5 – – – – 2 – – – – –
158302260SPEC
6 files

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WL-SWTP SMT White Top view PLCC 3 – – – – – – – – SMT – Cool White – 22 – 3.2 InGaN 120 3022 – – – – – – – – – – – 0.8 – – – – – – – – – Tape and Reel
97790503211SPEC
–3 files

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WA-SCRW Pan Head Screw w. cross slot M3 5 – – – – – – – – – – – – – – – – – – – – – – – – – – UL94 V-0 – – – – – – – – – – – – Bulk
61300211121SPEC
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WR-PHD 2.54 mm THT Pin Header 5.08 – – – – – – – – THT – – – – – – – – – – – – – 250 – – – – – – – – – – – 2 Single Pin Header Straight 3000 Bag
7447789133SPEC
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WE-PD SMT Power Inductor 7.3 – – 33 – – – 240 – – – – – – – – – – 7332 – – – – – 1.85 Robust – – – – 3.2 – – – – – – – – – –
61300311121SPEC
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WR-PHD 2.54 mm THT Pin Header 7.62 – – – – – – – – THT – – – – – – – – – – – – – 250 – – – – – – – – – – – 3 Single Pin Header Straight 3000 Bag
970100365SPEC
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WA-SPAII Plastic Spacer Stud, metric, internal/ internal 10 – M3 – – – – – – – – – – – – – – – – – – – – – – – 6 UL94 HB – – – – – – – – – – – – Bag
61300511121SPEC
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WR-PHD 2.54 mm THT Pin Header 12.7 – – – – – – – – THT – – – – – – – – – – – – – 250 – – – – – – – – – – – 5 Single Pin Header Straight 3000 Bag
971150365SPEC
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WA-SPAIE Plastic Spacer Stud, metric, internal/ external 15 M3 M3 – – – – – – – – – – – – – – – – – – – – – – – 6 UL94 HB – – – – – – – – – – – – Bag
613024243121SPEC
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WR-PHD 2.54 mm Angled Dual Socket Header 30.98 – – – – – – – – THT – – – – – – – – – – – – – 250 – – – – – – – – – – – 24 Dual Socket Header Angled 3000 Tray
694106301002SPEC
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WR-DC DC Power Jack Right Angled (6.4) – – – – – – – – – THT – – – – – – – – – – – – 5 30 – – – – – – – – – – – – – – Right Angled 5000 Bag
434153017835SPEC
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WS-TASV J-Bend SMT Tact Switch 3.5x2.9 mm – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 1.7 350 200000 Blue not specified – – – – 50 Tape and Reel
65100516121SPEC
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WR-COM Mini USB 2.0 Type B SMT Horizontal 5 Contacts – – – – – – – – – SMT – – – – – – – – – – – – – 30 – – – – Mini USB Type B – – – – – 5 – Receptacle Horizontal 1000 Tape and Reel & Mylar
709940300SPEC
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WA-SNTE Snap-In Stop Spacer for Printed Circuit Boards – – M3 – – – – – – – – – – – – – – – – – – – – – – – 5.5 UL94 V-2 – – 2.4 – – – – – – – – – Bag
150141RS63140SPEC
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WL-SMTD SMT Mono-color TOP LED Diffused Dome – – – – – – – – – SMT 620 Red 630 – 16000 2.4 AlInGaP 30 3528 – – – – – – – – – – – – – – – – – – – – – –
150141YS63140SPEC
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WL-SMTD SMT Mono-color TOP LED Diffused Dome – – – – – – – – – SMT 590 Yellow 592 – 15000 2.4 AlInGaP 30 3528 – – – – – – – – – – – – – – – – – – – – – –
Order Code Data­sheet Simu­lation
150060RS75000SPEC
150060YS75000SPEC
150060GS75000SPEC
150060BS75000SPEC
782853221SPEC
78438335220SPEC
158302260SPEC
97790503211SPEC
–
61300211121SPEC
–
7447789133SPEC
61300311121SPEC
–
970100365SPEC
–
61300511121SPEC
–
971150365SPEC
–
613024243121SPEC
–
694106301002SPEC
–
434153017835SPEC
–
65100516121SPEC
–
709940300SPEC
–
150141RS63140SPEC
–
150141YS63140SPEC
–
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)		ToTiL
(µH)		IR,40K
(A)		ISAT,10%
(A)		ISAT,30%
(A)		RDC max.
(mΩ)		fres
(MHz)		MountλDom typ.
(nm)		Emitting ColorλPeak typ.
(nm)		ΦV typ.
(lm)		IV typ.
(mcd)		VF typ.
(V)		Chip Technology2θ50% typ.
(°)		SizeZ @ 100 MHz
(Ω)		Zmax
(Ω)		RDC
(Ω)		IR
(A)		Working Voltage
(V (AC))		IRP,40K
(A)		VersionSW
(mm)		Flammability RatingApplicationInterface TypeH
(mm)		Operation Force (Value)
(g)		Electrical Life
(Cycles)		Actuator ColorVaporphase processPinsRowsGenderTypeIR
(mA)		Packaging Samples