Texas Instruments LP8860-Q1EVM User manual

Using the LP8860-Q1EVM Evaluation Module
User's Guide
Literature Number: SNVU382A
April 2014–Revised June 2014

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Contents
Contents
Preface ........................................................................................................................................ 5
1 Introduction......................................................................................................................... 6
1.1 Trademarks......................................................................................................................... 6
2 Description of the LP8860-Q1................................................................................................ 7
2.1 Features....................................................................................................................... 7
2.2 Applications................................................................................................................... 7
2.3 Typical Applications ......................................................................................................... 8
3 Hardware Setup.................................................................................................................. 12
4 Board Layout..................................................................................................................... 13
5 Board Stackup ................................................................................................................... 15
6 Power Sequences............................................................................................................... 16
6.1 Start-up Sequence ......................................................................................................... 16
6.2 Shutdown Sequence....................................................................................................... 16
7 Evaluation Board Schematic................................................................................................ 17
8 Bill of Materials .................................................................................................................. 19
9 Evaluation Software............................................................................................................ 21
9.1 Setup......................................................................................................................... 21
9.2 Usage........................................................................................................................ 21
9.2.1 Pin Control Tab.................................................................................................... 23
9.2.2 Brightness Control Tab........................................................................................... 24
9.2.3 Faults and Status Tab ............................................................................................ 25
9.2.4 Boost Tab .......................................................................................................... 26
9.2.5 Fault and Adaptive Voltage Control Tab ....................................................................... 27
9.2.6 LED Drivers Tab................................................................................................... 28
9.2.7 Temperature Tab.................................................................................................. 31
9.2.8 EEPROM Map Tab................................................................................................ 32
9.2.9 History Tab......................................................................................................... 33
A Virtual COM Port Configuration............................................................................................ 34
B Virtual COM Port Communication......................................................................................... 37
C LED Load Board................................................................................................................. 38
D Quick Start Guide............................................................................................................... 41
D.1 EVM Board Default Jumper and Cable Positions...................................................................... 41
D.2 First Step: Light up LEDs.................................................................................................. 46
D.3 Changing EEPROM Parameters......................................................................................... 48
D.4 Recovering Original EEPROM Parameters............................................................................. 49
D.5 Changing Brightness Control from I2C/SPI Register Control to PWM Input Pin Control.......................... 51
D.6 Smooth Brightness Change with Slope Control........................................................................ 52
D.7 Changing Boost Switching Frequency to 2.2 MHz..................................................................... 53
D.8 Cluster Mode, 4 LED Strings with Independent Brightness Control................................................. 55
D.9 Using EVM without MCU (MSP430), Standalone Mode .............................................................. 57
Revision History.......................................................................................................................... 59

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List of Figures
List of Figures
2-1. Typical Application, Simple PWM Control, VDD = 3.3 V, Charge Pump On, 4 Strings ............................ 8
2-2. Typical Application, SPI Control, VDD = 5 V, Charge Pump Off, 2 Strings.......................................... 9
2-3. Typical Application, I2C Control, VDD = 3.3 V, Charge Pump On, 4 Strings....................................... 10
2-4. Typical Application, without Serial Interface, VDD = 5 V, Charge Pump Off, 3 Strings........................... 11
3-1. Evaluation Board Connectors and Setup ............................................................................... 12
4-1. Top Layer ................................................................................................................... 13
4-2. Bottom Layer (GND)....................................................................................................... 13
4-3. PCB Layout Example...................................................................................................... 14
5-1. Evaluation Board Stackup................................................................................................. 15
7-1. Evaluation Board Schematic, Microcontroller and Related Components........................................... 17
7-2. Evaluation Board Schematic, LP8860-Q1 and Main Components .................................................. 18
9-1. Main Window Structure.................................................................................................... 22
9-2. Main Window and Pin Control Tab....................................................................................... 23
9-3. Brightness Control Tab.................................................................................................... 24
9-4. Fault and Status Tab....................................................................................................... 25
9-5. Boost Controls Tab......................................................................................................... 26
9-6. Interactive Boost Diagram Window ...................................................................................... 26
9-7. Fault and Adaptive Voltage Control Tab ................................................................................ 27
9-8. LED Fault And Adaptive Voltage Control Functionality Diagram .................................................... 27
9-9. LED Driver Controls........................................................................................................ 28
9-10. LED Driver Diagram Window ............................................................................................. 28
9-11. PLL Diagram Window...................................................................................................... 29
9-12. PLL Calculator for External VSYNC (Steps Show Order for Applying Commands)............................... 29
9-13. PLL Calculator for Internal Oscillator .................................................................................... 30
9-14. Temperature Sensors Control ............................................................................................ 31
9-15. EEPROM Map.............................................................................................................. 32
9-16. History Tab.................................................................................................................. 33
A-1. Device Manager View. Select the Virtual COM Port .................................................................. 34
A-2. Open Properties by Clicking Right Mouse Button on Virtual COM Port ............................................ 35
A-3. Select Port Settings from the Virtual COM Port Properties........................................................... 35
A-4. Select Advanced from Virtual COM Port Properties and Select COM Port Number (9 or smaller) ............. 36
C-1. LED Load Board - Top Side .............................................................................................. 38
C-2. LED Load Board - Bottom View.......................................................................................... 38
C-3. LED Load Board - Schematic Diagram.................................................................................. 39
C-4. Forward Voltage for Cree Xlamp ML-B LEDs ......................................................................... 40
D-1. Jumper Positions........................................................................................................... 43
D-2. CPUMP Jumper ............................................................................................................ 44
D-3. Interface Jumpers .......................................................................................................... 58

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List of Figures

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Read This First
Preface
SNVU382A–April 2014–Revised June 2014
Read This First
About this Manual
This user’s guide describes the module used to evaluate characteristics, operation, and use of the
LP8860-Q1 low EMI, high-performance 4-channel LED driver for automotive lighting. This document
includes a schematic diagram, PCB layout, and bill of materials (BOM). Evaluation software (SW) usage is
also described.
How to Use This Manual
This document contains the following chapters:
• Chapter 1: Introduction
• Chapter 2: Description of the LP8860-Q1
• Chapter 3: Hardware Setup
• Chapter 4: Board Layout
• Chapter 5: Board Stackup
• Chapter 6: Power Sequences
• Chapter 7: Evaluation Board Schematic
• Chapter 8: Bill of Materials
• Chapter 9: Evaluation Software
• Appendix A: Virtual COM Port Configuration
• Appendix B: Virtual COM Port Communication
• Appendix C: LED Load Board
• Appendix D: Quick Start Guide
Related Documentation from Texas Instruments
LP8860-Q1 data sheet
FCC Warning
This equipment is intended for use in a laboratory test environment only. It generates, uses, and can
radiate radio frequency energy and has not been tested for compliance with the limits of computing
devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable
protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user, at their own expense, will be
required to take whatever measures may be required to correct this interference.
If You Need Assistance
Contact your local TI sales representative.

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Introduction
Chapter 1
SNVU382A–April 2014–Revised June 2014
Introduction
The Texas Instruments LP8860-Q1EVM evaluation module (EVM) helps designers evaluate the operation
and performance of the LP8860-Q1 device. The LP8860-Q1EVM uses the LP8860-Q1 to drive up to 4
LED strings for LCD backlighting with high efficiency. Information about output voltage and current ratings
of the LP8860-Q1 can also be found in the device datasheet.
In order to facilitate ease of testing and evaluation of this circuit, the EVM contains a TI MSP430
microprocessor to provide easy communication via USB. Power supply connection for the VIN, VDD, and
test points for each signal can be found on the evaluation board. Windows®SW is used to control
I2C/SPI™ registers of the device. A separate LED board can be used as a load; it is also possible to
connect LCD panel to the output connectors.
For evaluation purposes, the EVM has been tested over a 3-V to 48-V input range. This voltage range is
within the recommended operating range for input voltage of the LP8860-Q1. Users are cautioned to
evaluate their specific operating conditions and choose components with the appropriate voltage ratings
before designing this support circuitry into a final product.
1.1 Trademarks
Windows is a registered trademark of Microsoft Corporation.
SPI is a trademark of Motorola.
All other trademarks are the property of their respective owners.

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Description of the LP8860-Q1
Chapter 2
SNVU382A–April 2014–Revised June 2014
Description of the LP8860-Q1
The LP8860-Q1 is an automotive high-efficiency LED driver with integrated boost controller. It has 4 high-
precision current sinks that can be controlled by a PWM input signal, an SPI/I2C master, or both.
The boost converter has adaptive output voltage control based on the LED current sink headroom
voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient
level in all conditions. A boost controller supports spread spectrum for switching frequency and an external
synchronization with a dedicated pin. The high switching frequency allows the LP8860-Q1 to avoid
disturbance for AM radio band.
The LP8860-Q1 supports built-in Hybrid PWM and Current Dimming which reduces EMI, extends the LED
lifetime, and increases the total optical efficiency. Phase-shift PWM allows reduced audible noise and
smaller boost output capacitors.
The LP8860-Q1 can drive an external p-FET to disconnect the input supply from the system in the event
of a fault and reduce inrush current and standby power consumption.
The input voltage range for LP8860-Q1 is 3 V to 48 V to support car stop/start conditions. The device
integrates extensive safety and protection features.
2.1 Features
• Four High-Precision Current Sinks
– Current Matching 0.5% typ
– Output Current up to 150 mA/Channel
– Individual LED String Current Adjustment
– Dimming Ratio >13000:1 with External PWM Brightness Control
– 16-bit dimming control with SPI or I2C Control
– Two Modes: Display Mode and Cluster Mode with Individual Control
• Hybrid PWM and Current Dimming for Higher LED Drive Optical Efficiency
• Synchronization for LED PWM
• Boost Controller With Programmable Switching Frequency 100 kHz to 2.2 MHz and Spread Spectrum
Option
• Boost Synchronization Input
• Input Voltage Operating Range 3 V to 48 V
• Power Line FET Control for Inrush Current Protection and Standby Energy Saving
• Automatic LED Current Reduction with External Temperature Sensor
• Extensive Safety and Fault Tolerance Features
• SPI or I2C Interface
2.2 Applications
• Automotive Infotainment, Instrument Cluster and Backlighting Systems

RISENSE
CFLY
RSENSE
RISET
NTC
COUT CIN
Q1
SD
VSENSE_N
VSENSE_P
C1P C1N GD
ISENSE
ISENSE_GND
FB
SQW
OUT1
OUT2
OUT3
OUT4
TSENSE
ISET
UP TO 150 mA/STRING
PGNDPAD
LGND
SGND
CCPUMP
CVDD
VDD
CPUMP
FILTER
SYNC
VSYNC
PWM
SCLK/SCL
MOSI/SDA
MISO
NSS
VDDIO/EN
IF
FAULT
LP8860-Q1
Q2
D
L
VIN
3-40 V
VDD 3.3 V
BOOST SYNC
V/H SYNC
BRIGHTNESS
FAULT RESET
ENABLE
FAULT
VDDIO
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Description of the LP8860-Q1
2.3 Typical Applications
Figure 2-1. Typical Application, Simple PWM Control,
VDD = 3.3 V, Charge Pump On, 4 Strings

RISENSE
RSENSE
RISET
NTC
COUT CIN
Q1
SD
VSENSE_N
VSENSE_P
C1P C1N GD
ISENSE
ISENSE_GND
FB
SQW
OUT1
OUT2
OUT3
OUT4
TSENSE
ISET
UP TO 300 mA/STRING
PGNDPAD
LGND
SGND
CCPUMP
VDD
CPUMP
FILTER
SYNC
VSYNC
PWM
SCLK/SCL
MOSI/SDA
MISO
NSS
VDDIO/EN
IF
FAULT
LP8860-Q1
Q2
D
L
VIN
3-40 V
VDD 5 V
BOOST SYNC
V/H SYNC
BRIGHTNESS
NSS
ENABLE
FAULT
VDDIO
SCLK
MOSI
MISO
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Description of the LP8860-Q1
Figure 2-2. Typical Application, SPI Control,
VDD = 5 V, Charge Pump Off, 2 Strings

RISENSE
CFLY
RSENSE
RISET
NTC
COUT CIN
Q1
SD
VSENSE_N
VSENSE_P
C1P C1N GD
ISENSE
ISENSE_GND
FB
SQW
OUT1
OUT2
OUT3
OUT4
TSENSE
ISET
UP TO 150 mA/STRING
PGNDPAD
LGND
SGND
CCPUMP
CVDD
VDD
CPUMP
FILTER
SYNC
VSYNC
PWM
SCLK/SCL
MOSI/SDA
MISO
NSS
VDDIO/EN
IF
FAULT
LP8860-Q1
Q2
D
L
VIN
3-40 V
VDD 3.3 V
BOOST SYNC
V/H SYNC
BRIGHTNESS
FAULT RESET
ENABLE
FAULT
VDDIO
SCL
SDA
Typical Applications www.ti.com
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Description of the LP8860-Q1
Figure 2-3. Typical Application, I2C Control,
VDD = 3.3 V, Charge Pump On, 4 Strings

RSENSE
COUT CIN
Q1
SD
VSENSE_N
VSENSE_P
C1P C1N GD
ISENSE
ISENSE_GND
FB
SQW
OUT1
OUT2
OUT3
OUT4
TSENSE
ISET
UP TO 150 mA/STRING
PGNDPAD
LGND
SGND
CCPUMP
VDD
CPUMP
FILTER
SYNC
VSYNC
PWM
SCLK/SCL
MOSI/SDA
MISO
NSS
VDDIO/EN
IF
FAULT
LP8860-Q1
D
L
VIN
3-40 V
VDD 5 V
BRIGHTNESS
ENABLE
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Description of the LP8860-Q1
Figure 2-4. Typical Application, without Serial Interface,
VDD = 5 V, Charge Pump Off, 3 Strings

Microcontroller and needed
external components for
I2C/SPI communication
USB
connector
VDD connector
3...5V
VIN connector
3...40V
Kelvin connectors
Connectors for external
board or panel
External NTC
connector Rail (VDD) voltage selection (USB 5V, 3.3V or external) VDDIO voltage selection (same as VDD or 3.3V)
Jumpers for
interface selection
Jumpers for connecting
C digital signals to
LP8860-Q1
LP8860-Q1 needed external
components
FAULT, red
LED
USB ok, blinking
green LED
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Hardware Setup
Chapter 3
SNVU382A–April 2014–Revised June 2014
Hardware Setup
Figure 3-1 shows connectors and main components on the board.
Figure 3-1. Evaluation Board Connectors and Setup
Note. If charge pump is not in use, J10 “CPUMP” should be shorted.

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Board Layout
Chapter 4
SNVU382A–April 2014–Revised June 2014
Board Layout
Figure 4-1. Top Layer
Figure 4-2. Bottom Layer (GND)

1
2
3
4
5
6
7
8
9
10 11 12 13 14
25 26 27 28
24
23
22
21
20
19
18
17
FAULT
SQW OUT4
IF
C1P
C1N
CPUMP
VDD
SD
OUT1
OUT2
LGND
FB
SGND
FILTER
ISET
TSENSE
SYNC
VSYNC
PWM
MISO
NSS
OUT3
15 16
29 30 31 32
PGND
GD
ISENSE
ISENSE_GND
VDDIO/EN
SCLK/SCL
MOSI/SDA
VSENSE_P
VSENSE_N
VDD
BATTERY
+VBATT -VBATT
VIA to GND plane
Input capacitors
D1 C8
C9
C3
C4
R1
R2
Q1
L1
Q2
R3
R5
C5
C1
C2
R4
C7
C6
Ground wire for
current sensor
Output capacitors
Feedback line
Connection
between PGND
and GND
LP8860-Q1
ISENSE
FB
SGND
PWM
OUT1
OUT2
OUT3
OUT4
L1 D1
+VBATT
FILTER
VSYNC
SD GD
VSENSE_N
Q2
ISENSE_GND
CPUMP
C1P C1N
VDD
SYNC
VDDIO/EN
SCLK/SCL
MOSI/SDA
MISO
NSS
PGND LGND PAD
IF
VSENSE_P
R1
TSENSE
ISET
FAULT
SQW
VDD 3.3V
Q1
R2
C1 C2
C3 C4 C5
R3
R4
R5
C6
C7
C8
C9
2
32
31
5
6
3
1
12
9
13
18
16
15
14
17
19
20
11
10 29 23
7
8
21
22
24
25
4
26
27
28
30
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Board Layout
Figure 4-3. PCB Layout Example
See the LP8860-Q1 datasheet for PCB layout guidelines.

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Board Stackup
Chapter 5
SNVU382A–April 2014–Revised June 2014
Board Stackup
Figure 5-1. Evaluation Board Stackup
Details:
• 2-layer board FR4
• Top layer - copper 35 µm
• Core 1.6 mm
• Bottom Layer - copper 35 µm
• Surface finish immersion gold

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Power Sequences
Chapter 6
SNVU382A–April 2014–Revised June 2014
Power Sequences
The LP8860-Q1 has a dual function VDDIO/EN pin. It acts as enable for the chip as well as
supply/reference voltage for IO logic. Device starts when VDD voltage is present and above the
VDD_UVLO voltage level and the VDDIO/EN voltage is set above threshold voltage (1.2 V).
6.1 Start-up Sequence
The backlight is started either by setting PWM input high or by writing not zero brightness value to
registers, depending on the brightness control mode and phase shift configuration. See the LP8860-Q1
datasheet for details.
6.2 Shutdown Sequence
The backlight is shut down either with setting PWM input low or by writing zero brightness value to
registers, depending on the brightness control mode and phase shift configuration. See the LP8860-Q1
datasheet for details.

2 3 4 1 5
J4 1734035-2
1 34
2G
G
24MHz
Y1
ABM8-24.000MHZ-B2-T
27
R6 27 R7
1.50k
R9 1.0Meg
R10
47k R1
100
R2
240
R11 240 R14
1.50k
R16
4
1
2
3
J5
IN
1OUT 5
2
CBYP 4
ON/OFF
3
GND
U1 LP2985AIM5-3.3
P6.0/CB0/A0 1 P6.1/CB1/A1 2 P6.2/CB2/A2 3 P6.3/CB3/A3 4 P6.4/CB4/A4 5 P6.5/CB5/A5 6 P6.6/CB6/A6 7 P6.7/CB7/A7 8
P5.0/A8/VEREF+
9
P5.1/A9/VEREF-
10
AVCC1
11
P5.4/XIN
12
P5.5/XOUT
13
AVSS1 14
DVCC1
15 DVSS1 16
VCORE
17
P1.0/TA0CLK/ACLK
18
P1.1/TA0.0
19
P1.2/TA0.1
20
P1.3/TA0.2
21
P1.4/TA0.3
22
P1.5/TA0.4
23
P1.6/TA1CLK/CBOUT
24
P1.7/TA1.0
25
P2.0/TA1.1 26 P2.1/TA1.2 27
P2.2/TA2CLK/SMCLK 28
P2.3/TA2.0 29 P2.4/TA2.1 30 P2.5/TA2.2 31
P2.6/RTCCLK/DMAE0 32
P2.7/UCB0STE/UCA0CLK 33
P3.0/UCB0SIMO/UCB0SDA
34
P3.1/UCB0SOMI/UCB0SCL
35
P3.2/UCB0CLK/UCA0STE
36
P3.3/UCA0TXD/UCA0SIMO
37
P3.4/UCA0RXD/UCA0SOMI
38
DVSS2 39
DVCC2
40
P4.0/PM_UCB1STE/PM_UCA1CLK 41
P4.1/PM_UCB1SIMO/PM_UCB1SDA 42
P4.2/PM_UCB1SOMI/PM_UCB1SCL 43
P4.3/PM_UCB1CLK/PM_UCA1STE 44
P4.4/PM_UCA1TXD/PM_UCA1SIMO 45
P4.5/PM_UCA1RXD/PM_UCA1SOMI 46
P4.6/PM_NONE 47 P4.7/PM_NONE 48
VSSU 49
PU.0/DP 50
PUR 51
PU.1/DM 52
VBUS
53
VUSB
54
V18
55
AVSS2 56
P5.2/XT2IN
57
P5.3/XT2OUT
58
TEST/SBWTCK
59
PJ.0/TDO
60
PJ.1/TDI/TCLK
61
PJ.2/TMS
62
PJ.3/TCK
63
RST/NMI/SBWTDIO
64
QFN PAD 65
U2 MSP430F5510IRGC
Green
1 2
D2 Orange
1 2
D3
GND
LED2 LED2
LED1
LED1
NSS-UC
MISO-UC
SDA/MOSI-UC SCL/SCLK-UC
FAULT-UC SYNC-UC
VSYNC-UC
PWM-UC EN-UC IF-UC
1.50k R17 10k R18
VCC
SDA/MOSI-UC SCL/SCLK-UC FAULT-UC
GND
XIN XOUT
XIN
XOUT
GND
VCC 22pF
C31
22pF C30
GND
—) C25 —) C26 —) C27 —) C28 —) C29
V18
V18
VCORE
VCORE
VUSB
—) C22 VUSB —) C20
VBUS
VBUS
DP DM
GND
GND
VCC
—) C10
VBUS
GND
GNDGND
DP DM
PUR
PUR
TEST RST
GND
VCC
TEST
RST
SBW
10pF C11
10pF C15
GND
GND
—) C12 —)
C14
—) C13
GND GND GND GND
VBUS 3.3V
21
S1 2200pF C8 GND
RST VCC RESET FIRMWARE LOADER
21
S2
PURVUSB
1
2
3
J1
—) C1
GND
VCC 3.3V
3.3V
VDDIO
FAULT-UC SYNC-UC VSYNC-UC MISO-UC SDA/MOSI-UC SCL/SCLK-UC NSS-UC PWM-UC EN-UC IF-UC
FAULT SYNC VSYNC MISO SDA/MOSI SCL/SCLK NSS PWM EN IF
RAIL
3.3V
3.3V
VCC
VBUS
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Evaluation Board Schematic
Chapter 7
SNVU382A–April 2014–Revised June 2014
Evaluation Board Schematic
Figure 7-1. Evaluation Board Schematic, Microcontroller and Related Components

1 2
J3
1 2 3
J20
5 4 1 2 3 6
J9
5
4
1 2 3Q1
SQJ461EP
FAULT SYNC VSYNC
MISO
SDA/MOSI
SCL/SCLK
NSS PWM
IFAUTO
EN
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 17 19
16 18 20
J11
1 2 3 4
J18 INTERFACE
MANUAL
AUTO
SPI
I2C
IFAUTO
IF
GND
VCC
1 2
J2 1727010
1 2
J6 1727010
1 2
J7
BOOST OUT1 OUT2 OUT3 OUT4
GND
47pF C18
PGNDPGNDPGNDPGND
0.025 R5
PGND
VBATT
GND
10 R12
0
R13 1.6Meg R15
PGNDPGND
BOOST
BOOST
—) C19
—) C21
—)
C23 —)
C24
RAIL
GND GND
PGND
1
2
J10
25.5k
R19
1
J15
GND
1
J13
FAULT SYNC VSYNC MISO SDA/MOSI SCL/SCLK NSS PWM EN IF
GND
OUT2 OUT3 OUT4 OUT1
1000pF C16
20k R4
PGND
10 R8
PGND
1 2 3 4 5 6
J8
—) C17
GND
3.3V VBUS
RAIL
RAIL
GND
RAIL
USB 3.3V
EXT
1 2
J19
47.0k ohm
tƒ
RT1
15.0k
R22 3.00k R20 GND
GNDGND
1
J21
1
J17
1
J16
1
J14
1
J12
1
J22
GND
PGND
—) C2 —)
C3
PGND PGND
Filter components for different Vsync and PLL frequences VSYNC (50Hz & BW3db = 1Hz): VCO[Mhz] C33 C32 R21 5 100n 1.4u 85k 10 54n 0.7u 170k 20 27n 0.35u 338k 40 13.6n 0.175u 677k HSYNC (50kHz & BW3db = 330Hz): VCO[Mhz] C33 C32 R21 5 22n 322n 5.6k 10 12n 161n 11,2k 20 6.2n 80n 22.3k 40 3.1n 40n 44,7k HSYNC (20kHz & BW3db = 330Hz): VCO[Mhz] C33 C32 R21 5 10n 129n 14k 10 5n 65n 28k 20 2.5n 32n 56k 40 1.2n 16n 112k
—) C33
—) C32
84.5k
R21
GND
GND
C1P
1C1N 2
VDD
3
SQW 4
VSENSE_N
5
VSENSE_P
6
ISET 7
TSENSE 8
FILTER
9
SGND 10
FAULT
11
SYNC
12
VSYNC
13
MISO
14
MOSI/SDA
15
SCLK/SCL
16
NSS
17
PWM
18
VDDIO/EN
19
IF
20
OUT4 21 OUT3 22
LGND 23
OUT2 24 OUT1 25
FB 26
ISENSE_GND 27
ISENSE 28
PGND 29
GD 30
CPUMP
31
SD
32
EP
U3 LP8860QVFPRQ1
VSENSEP VSENSEN SD
SD
VSENSEP
VSENSEN
90V
D4
B190-13-F
PGND
1
J23
SWVIN
ISENSE
0 R23
13 2
D1
SS5P10-M3/86A
L1
IHLP5050FDER220M5A
EXTVDD
3.3V
VCC
VBUS
FAULT SYNC VSYNC MISO SDA/MOSI SCL/SCLK NSS PWM EN IF RAIL RAIL
0.02 R3
PGNDPGNDPGND 1
3 4
Q2 IPD25N06S4L-30
—) C9 —)
C4 —)
C5 —)
C6 —)
C7
2200pF C34 2200pF C35 2200pF C36 2200pF C37
OUT2 OUT3 OUT4 OUT1 BOOST
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Evaluation Board Schematic
Figure 7-2. Evaluation Board Schematic, LP8860-Q1 and Main Components

19
SNVU382A–April 2014–Revised June 2014
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Bill of Materials
Chapter 8
SNVU382A–April 2014–Revised June 2014
Bill of Materials
The following is the bill of materials for the LP8860-Q1EVM:
Designator Description Manufacturer Part Number Qty
C1, C10, C12, C14,
C19 CAP, CERM, 10uF, 16V, +/-20%, X5R, 0603 Taiyo Yuden EMK107BBJ106MA-T 5
C2, C3 CAP, AL, 33uF, 50V, +/-20%, 40
mohm, SMD Panasonic EEHZC1H330XP 2
C4, C5, C6, C7, C9 CAP, CERM, 10uF, 50V, +/-10%,
X5R, 1206_190 TDK CGA5L3X5R1H106K160AB 5
C8 CAP, CERM, 2200pF, 50V, +/-10%,
X7R, 0603 Kemet C0603C222K5RACTU 1
C11, C15 CAP, CERM, 10pF, 50V, +/-5%,
C0G/NP0, 0603 AVX 06035A100JAT2A 2
C13 CAP, CERM, 0.01uF, 50V, +/-5%,
X7R, 0603 Kemet C0603C103J5RACTU 1
C16 CAP, CERM, 1000pF, 100V, +/-10%,
X7R, 0603 AVX 06031C102KAT2A 1
C17 CAP, CERM, 10uF, 16V, +/-20%,
X5R, 0603 Taiyo Yuden EMK107BBJ106MA-T 1
C18 CAP, CERM, 47pF, 50V, +/-5%,
C0G/NP0, 0603 Kemet C0603C470J5GACTU 1
C20, C24, C27, C28,
C29 CAP, CERM, 0.1uF, 16V, +/-20%, X7R, 0603 Kemet C0603C104M4RACTU 5
C21, C22, C23, C26 CAP, CERM, 1uF, 10V, +/-10%, X5R,
0603 Kemet C0603C105K8PACTU 4
C25 CAP, CERM, 0.22uF, 16V, +/-10%,
X7R, 0603 Kemet C0603C224K4RACTU 1
C30, C31 CAP, CERM, 22pF, 50V, +/-5%,
C0G/NP0, 0603 Kemet C0603C220J5GACTU 2
C32 CAP, CERM, 1.2uF, 6.3V, +/-10%,
X5R, 0603 Kemet C0603C125K9PACTU 1
C33 CAP, CERM, 0.1uF, 25V, +/-5%,
X7R, 0603 AVX 06033C104JAT2A 1
C34, C35, C36, C37 CAP, CERM, 2200pF, 50V, +/-10%,
X7R, 0603 Kemet C0603C222K5RACTU 4
D1 Diode, Schottky, 100V, 5A, TO-277A Vishay-
Semiconductor SS5P10-M3/86A 1
D2 LED, Green, SMD Lite-On LTST-C190GKT 1
D3 LED, Orange, SMD Lite-On LTST-C190KFKT 1
D4 Diode, Schottky, 90V, 1A, SMA Diodes Inc. B190-13-F 1
J1, J20 Header, TH, 100mil, 3x1, Gold
plated, 230 mil above insulator Samtec TSW-103-07-G-S 2
J2, J6 Conn Term Block, 2POS, 3.81mm,
TH Phoenix Contact 1727010 2

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20 SNVU382A–April 2014–Revised June 2014
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Bill of Materials
Designator Description Manufacturer Part Number Qty
J3, J7, J10, J19 Header, TH, 100mil, 2x1, Gold
plated, 230 mil above insulator Samtec TSW-102-07-G-S 4
J4 Conn Rcpt Mini USB2.0 Type B
5POS SMD TE Connectivity 1734035-2 1
J5 Header, TH, 100mil, 4x1, Gold
plated, 230 mil above insulator Samtec TSW-104-07-G-S 1
J8 Header, 100mil, 3x2, Tin, TH Sullins Connector
Solutions PEC03DAAN 1
J9 Header, TH, 100mil, 6x1, Gold
plated, 230 mil above insulator Samtec TSW-106-07-G-S 1
J11 Header, TH, 100mil, 10x2, Gold
plated, 230 mil above insulator Samtec TSW-110-07-G-D 1
J12, J13, J14, J15,
J16, J17, J21, J22, J23 CONN HEADER 1POS .100" SNGL TIN, TH Samtec TSW-101-17-T-S 1
J18 Header, TH, 100mil, 2x2, Gold
plated, 230 mil above insulator Samtec TSW-102-07-G-D 9
L1 Inductor, Shielded, Powdered Iron,
22uH, 5.5A, 0.0313 ohm, SMD Vishay-Dale IHLP5050FDER220M5A 1
Q1 MOSFET, P-CH, -60V, 30A,
PowerPAK_SO-8L Vishay-Siliconix SQJ461EP 1
Q2 MOSFET, N-CH, 60V, 25A, DPAK Infineon Technologies IPD25N06S4L-30 1
R1 RES, 47k ohm, 5%, 0.1W, 0603 Yageo America RC0603JR-0747KL 1
R2 RES, 100 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW0603100RJNEA 1
R3 RES, 0.02 ohm, 1%, 3W, 2512 Bourns CRA2512-FZ-R020ELF 1
R4 RES, 20k ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW060320K0JNEA 1
R5 RES, 0.025 ohm, 1%, 3W, 2512 Bourns CRA2512-FZ-R025ELF 1
R6, R7 RES, 27 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW060327R0JNEA 2
R8, R12 RES, 10 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW060310R0JNEA 2
R9, R16, R17 RES, 1.50k ohm, 1%, 0.1W, 0603 Yageo America RC0603FR-071K5L 3
R10 RES, 1.0Meg ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031M00JNEA 1
R11, R14 RES, 240 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW0603240RJNEA 2
R13 RES, 0 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06030000Z0EA 1
R15 RES, 1.6Meg ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031M60JNEA 1
R18 RES, 10k ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW060310K0JNEA 1
R19 RES, 25.5k ohm, 1%, 0.1W, 0603 Yageo America RC0603FR-0725K5L 1
R20 RES, 3.00k ohm, 1%, 0.1W, 0603 Yageo America RC0603FR-073KL 1
R21 RES, 84.5k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060384K5FKEA 1
R22 RES, 15.0k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060315K0FKEA 1
R23 RES, 0 ohm, 5%, 2W, 2512 WIDE Vishay Draloric RCL12250000Z0EG 1
RT1 Thermistor NTC, 47.0k ohm, 1%,
0603 MuRata NCP18WB473F10RB 1
S1, S2 Switch, Push Button, SMD Alps SKRKAEE010 2
U1 Micropower 150 mA Low-Noise Ultra
Low-Dropout Regulator, 5-pin SOT-
23
Texas Instruments LP2985AIM5-3.3 1
U2 Mixed Signal MicroController,
RGC0064B Texas Instruments MSP430F5510IRGC 1
U3 LOW EMI, High Performance 4-
Channel LED Driver for Automotive
Lighting, VFP0032B
Texas Instruments LP8860QVFPRQ1 1
Y1 Crystal, 24.000MHz, 18pF, SMD Abracon Corportation ABM8-24.000MHZ-B2-T 1