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On Semiconductor NCV78663 Evaluation Kit and Daughter Board NCV786XXAR10GEVK NCV786XXAR10GEVK Data Sheet

Product codes
NCV786XXAR10GEVK
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Page of 37
NCV78663
http://onsemi.com
4
Table 1. PIN DESCRIPTION
Pin#
Function
IO Type
Pin Name
29
VINBCK1
HV in
Buck 1 high voltage supply
30
IBCK1SENSE−
HV in
Buck 1 negative sense input
31
IBCK1SENSE+
HV in
Buck 1 positive sense input
32
N.C.
Not used (can be connected to GND)
33
VBOOST
HV supply
High voltage feedback input
34
VBOOSTM3V
HV IO
VBOOST−3V output
35
IBSTSENSE−
LV IO
Battery current negative feedback input
36
IBSTSENSE+
LV IO
Battery current positive feedback input
Figure 3. NCV78663 Application Circuit
1. As reported in the application diagram, the device pins TEST1 and TEST2 must be connected to ground.
2. For details about PCB layout, please refer to the dedicated section.
3. RF1 and RF2 resistors typical value is 2.2 kW and minimum required value is 1 kW. It is recommended not to exceed a value of 22 kW in
order not to alter the VLED sampled value.
VBB
VGATE
LEDCTRL1
IB
S
T
S
E
N
S
E
−
IB
ST
S
E
N
S
E+
GND
GNDP
LEDCTRL2
DIAG1
DIAG2
ON Semiconductor
LED driver
Front Lighting
NCV78663
L_boost
FE
T_
b
oo
st
Cboost_IN
C_boost_OUT
LBCKSW2
LBCKSW 1
IBCK1SENSE−
IBCK1SENSE +
Rboost _sense
VINBCK1
VINBCK2
VB
O
O
S
T
TST1 TST2
Light ECU
VDRIVE
SPI_SCLK
SPI_SDI
SPI_SDO
SPI_SCS
Optional
mC
CAN
Or
LIN
LBCKSW 1
1A
Optional temp sensing network
LED−string 1
T
VTEMP /AGP1
VLED1
VTEMP /AGP2
VLED2
IBCK2SENSE+
L_buck_1
L_buck_2
C_buck_1
C_buck_2
R_buck_1_sense
R_buck_2_sense
1A
Optional temp sensing network
LED−string 2
T
IBCK2SENSE−
VB
O
O
ST
M
3V
VDD
Power GND :
Signal GND :
RF1
RF2
CAN
Or
LIN
MASTER_VDD
MASTER_GND
SLAVE_VDD
Master In Slave Output (MISO)
SDI
SDO
SCLK
R
SDO
MASTER_CLK
Master Out Slave Input (MOSI)
SCSB
MASTER_CSB
SLAVE_GND
NCV78663
SPI BLOCK
(SLAVE)
SPI MASTER
(MCU/LOGIC)
(Note 4)
(Note 4)
(Note 4)
(Note 3)
Figure 4. Details on NCV78663 Connection Diagram for SPI (Optional)
4. R
SDO 
external resistor typical value is 1 kW. An additional capacitor to ground (typically 47 pF) may be used in case of application noise
observed.
5. External capacitors or RC may be added to these SPI lines for stable communication in case of application noise. The selection of these
components must be done so that the resulting waveforms are respecting the limits reported in Table 23.