NCV78763
Power Ballast and Dual LED
Driver for Automotive Front
Lighting 2
nd
Generation
The NCV78763 is a single−chip and high efficient smart Power
ballast and Dual LED DRIVER designed for automotive front lighting
applications like high beam, low beam, daytime running light (DRL),
turn indicator, fog light, static cornering and so on.
The NCV78763 is a best fit for high current LEDs and provides a
complete solution to drive two strings up to 60 V, by means of two
internal independent buck switch channel outputs, with a minimum of
external components. For each individual LED channel, the output
current and voltage can be customized according to the application
requirements. An on−chip diagnostic feature for automotive front
lighting is provided, easing the safety monitoring from the
microcontroller. The device integrates a current−mode voltage booster
controller, realizing a unique input current filter with a limited BOM.
When more than two LED channels are required on one module, then
two, three or more NCV78763 devices can be combined, with the
possibility for the booster circuits to operate in multiphase−mode. This
helps to further optimize the filtering effect of the booster circuit and
allows a cost effective dimensioning for mid to high power LED systems.
Due to the SPI programmability, one single hardware setup can support
multiple system configurations for a flexible platform solution approach.
Features
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SSOP36 EP
CASE 940AB
1
32
QFN32 7x7
CASE 485J
1 32
QFN32
CASE 488AM
1
1 32
QFNW32 5x5
CASE 484AB
32
QFNW32 7x7
CASE 484AG
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Single Chip Boost−Buck Solution
Two LED Strings up to 60 V
High Current Capability up to 1.6 A DC per Output
High Overall System Efficiency
Minimum of External Components
Active Input Filter with Low Current Ripple from Battery
Integrated Switched Mode Buck Current Regulator
Integrated Boost Current−mode Controller
Programmable Input Current Limitation
Average Current Regulation Through the LEDs
High Operating Frequencies to Reduce Inductor Sizes
Integrated PWM Dimming with Wide Frequency Range
Low EMC Emission for LED switching and dimming
SPI Interface for Dynamic Control of System Parameters
These are Pb−Free Devices
Front Lighting High Beam and Low Beam
Day time Running Light (DRL)
Position or Park light
Turn Indicator
Fog Light and Static Cornering
MARKING DIAGRAMS
NV78763−x
FAWLYYWWG
SSOP36
1
1
N78763−x
AWLYYWWG
N78763−x
FAWLYYWWG
QFN32
F
A
WL
YY
WW
G
QFNW32
= Fab Location
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
Typical Applications
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 45 of this data sheet.
©
Semiconductor Components Industries, LLC, 2015
October, 2018
−
Rev. 7
1
Publication Order Number:
NCV78763/D
NCV78763
Table 1. PIN DESCRIPTION
Pin No.
SSOP36−EP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Pin No.
QFN32
28
29
30
31
32
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
X
20
X
21
X
22
X
23
24
25
26
27
Pin Name
IBSTSENSE−
IBSTSENSE+
GNDP
VGATE
VDRIVE
VBB
TST
COMP
GND
VDD
TST1
BSTSYN
LEDCTRL1
LEDCTRL2
SCLK
CSB
SDI
SDO
TST2
VLED2
VLED1
IBCK2SENSE+
IBCK2SENSE−
VINBCK2
VINBCK2
LBCKSW2
LBCKSW2
LBCKSW1
LBCKSW1
VINBCK1
VINBCK1
IBCK1SENSE−
IBCK1SENSE+
VBOOSTBCK
VBOOSTM3V
VBOOST
Function
Battery current negative feedback input
Battery current positive feedback input
Power ground
Booster MOSFET gate pre−driver
10V supply
Battery supply
Internal function. To be tied to GND.
Compensation for the Boost regulator
Ground
3V logic supply
Internal function. To be tied to GND.
External clock for the boost regulator
LED string 1 enable
LED string 2 enable
SPI clock
SPI chip select (chip select bar)
SPI data input
SPI data output
Internal function. To be tied to GND.
LED string 2 forward voltage input
LED string 1 forward voltage input
Buck 2 positive sense input
Buck 2 negative sense input
Buck 2 high voltage supply
Buck 2 high voltage supply
Buck 2 switch output
Buck 2 switch output
Buck 1 switch output
Buck 1 switch output
Buck 1 high voltage supply
Buck 1 high voltage supply
Buck 1 negative sense input
Buck 1 positive sense input
High voltage for the BUCK switches
VBOOST−3V regulator output
Boost voltage feedback input
I/O Type
LV in/out
LV in/out
Ground
MV out
MV supply
HV supply
LV in/out
LV in/out
Ground
LV supply
LV in/out
MV in
MV in
MV in
MV in
MV in
MV in
MV open−drain
LV in/out
HV in
HV in
HV in
HV in
HV in
HV in
HV out
HV out
HV out
HV out
HV in
HV in
HV in
HV in
HV supply
HV out (supply)
HV in
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