ZL8800-2PH-DEMO1Z User Guide

Application Note 1901
Author: Philip McKenzie
ZL8800-2PH-DEMO1Z Demonstration Board
Target Specifications
The ZL8800 is a digital power conversion and management IC
that combines an efficient step-down DC/DC converter with
key power and thermal management functions in a single
package. The ZL8800 incorporates compensation-free
ChargeMode control to achieve single-cycle transient response.
• VIN = 12V
• VOUT = 1.2V/60A max
• fSW = 400kHz
The ZL8800-2PH-DEMO1Z demonstration board is a 6-layer
board demonstrating a 2 phase 60A synchronous buck
converter. Sequencing, margining, plus other features can be
evaluated using this demonstration board.
• Efficiency: 91% at 40A
• Output Ripple: ±1%
• Dynamic response: ±1% (50% to 100% to 50% load step,
di/dt = 10A/µs)
A USB to PMBus™ adapter board is used to connect the
demonstration board to a PC. The PMBus command set is
accessed by using the Zilker Labs PowerNavigator™ evaluation
software from a PC running Microsoft Windows.
• Board temperature: +25°C
Functional Description
The ZL8800-2PH-DEMO1Z provides all circuitry required to
demonstrate the features of the ZL8800. The
ZL8800-2PH-DEMO1Z has a functionally-optimized ZL8800
circuit layout that allows efficient operation up to the
maximum output current.
Key Features
• 2 phase 60A synchronous buck converter with
compensation-free ChargeMode control
• Designed to be easy to use and modify. Optimized for small
circuit footprint and dynamic response
A majority of the features of the ZL8800, such as
compensation-free ChargeMode control, soft-start delay and
ramp times, supply sequencing, voltage tracking, and voltage
margining are available on this demonstration board. For
voltage tracking and sequencing demonstration, the board can
be connected to any other Zilker Labs demonstration board
that supports the Digital-DC™ (DDC) bus.
Figure 1 shows a simplified schematic diagram of the
ZL8800-2PH-DEMO1Z board.
• Configurable through PMBus
• VIN range of 4.5V to 14V, VOUT adjustable from 0.54 to 5.5V
• Enable switches and power-good indicators
Ordering Information
PART NUMBER
DESCRIPTION
ZL8800-2PH-DEMO1Z ZL8800 Demonstration Kit (EVB, USB Adapter,
Cable)
VDD
Control &
Status
VIN
EN0
EN1
PG0
PG1
Vin
VDD
VDRV
ZL8800
PWMH0
PWM
PWML0
EN
BST
DrMOS
VIN
4.5V - 14V
Vsw
GND
VOUT
0.6V - 5V
ISENA0
ISENB0
DDC
VIN
Vin
VDRV
VDD
Inter-Device
Communication
PMBus
PWM
PWML1
EN
SDA
SCL
SALRT
DrMOS
PWMH1
BST
Vsw
GND
ISENA1
ISENB1
VSENP
VSENN
GND
FIGURE 1. ZL8800-2PH-DEMO1Z SIMPLIFIED SCHEMATIC
October 31, 2013
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1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013. All Rights Reserved
Intersil (and design), PowerNavigator and Digital-DC are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1901
The hardware enable function is controlled by a toggle switch on
the ZL8800-2PH-DEMO1Z board. The power-good (PG) LEDs
indicate the correct state of PG for each phase when external
power is applied to the ZL8800-2PH-DEMO1Z board and the
corresponding phase is functioning properly. The right angle
headers at opposite ends of the board are for connecting a USB
to PMBus adapter board or for daisy chaining multiple
demonstration boards together to build multi-output
configurations.
Figures 2 and 3 show the detailed demonstration circuit. Figure 2
shows the ZL8800 IC with its minimal component count to
realize a 60A output. Figure 3 has interface circuitry unique to
the demonstration board that is not typically contained in a
user’s application circuit. Figures 4 through 10 show typical
performance data, and Figures 15 through 22 demonstrate the
PCB board layout. The default configuration file is shown on
page 6, and the Bill of Materials (BOM) is included for reference
beginning on page 5.
Quick Start Guide
Stand Alone Operation
1. Set ENABLE switch to “DISABLE”
2. Apply load to VOUT0 and/or VOUT1
3. Connect the USB to PMBus adapter board to J8 (labeled
“DONGLE”) of ZL8800-2PH-DEMO1Z
4. Connect supplied USB cable from computer to USB to PMBus
adapter board
5. Connect power supply to VIN (supply turned off)
6. Turn power supply on
7. Set ENABLE switch to “ENABLE”
8. Monitor ZL8800-2PH-DEMO1Z board operation using an
oscilloscope
USB (PMBus) Operation
1. Set ENABLE switch to “DISABLE”
Operation
2. Apply load to VOUT and/or VOUT1
PMBus Operation
3. Connect power supply to VIN (supply turned off)
The ZL8800 utilizes the PMBus protocol. The PMBus functionality
can be controlled via USB from a PC running the PowerNavigator
evaluation software in a Windows XP or Windows 7 operating
systems.
4. Turn power supply on
Install the evaluation software from the following Intersil
website:
http://www.intersil.com/en/products/powermanagement/zilker-labs-digital-power/powernavigator.html
For board operation, connect the included USB-to-PMBus adapter
board to J8 of the ZL8800-2PH-DEMO1Z board labeled
“DONGLE”. Connect the desired load and an appropriate power
supply to the input and connect the included USB cable to the PC
running the PowerNavigator evaluation software. Place the
ENABLE switches in “DISABLE” and turn on the power.
5. Connect USB to PMBus adapter board to J8 of
ZL8800-2PH-DEMO1Z
6. Connect supplied USB cable from computer to USB to PMBus
adapter board.
Install the PowerNavigator evaluation software from the
following Intersil website:
http://www.intersil.com/en/products/powermanagement/zilker-labs-digital-power/powernavigator.html.
7. Set ENABLE switch to “ENABLE”.
8. Monitor and configure the ZL8800-2PH-DEMO1Z board using
PMBus commands in the evaluation software.
9. Test the ZL8800-2PH-DEMO1Z operation using an
oscilloscope and the evaluation software.
The evaluation software allows modification of all ZL8800
PMBus parameters. The ZL8800 device on the board has been
pre-configured as described in this document, but the user may
modify the operating parameters through the evaluation
software or by loading a predefined set-up from a configuration
file.
The ENABLE switch can then be moved to “ENABLE” and the
ZL8800-2PH-DEMO1Z board can be tested. Alternately, the
PMBus ON_OFF_CONFIG and OPERATION commands may be
used from the PowerNavigator GUI.
2
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ZL8800-2PH-DEMO1Z Board Schematics
3
Application Note 1901
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FIGURE 2. APPLICATION CIRCUIT
ZL8800-2PH-DEMO1Z Board Schematics (Continued)
4
Application Note 1901
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FIGURE 3. ZL8800-2PH-DEMO1Z AUXILIARY CIRCUITRY
Application Note 1901
ZL8800-2PH-DEMO1Z Bill of Materials
QTY
REFERENCE
VALUE
TOL
RATING
TYPE
1
U2
ZL8800
-
14V
-
8
C1, C2, C3, C5, C6, C7, C8, C9
100µF
20%
6.3V
X5R
4
C4, C10, C11, C12
470µF
20%
2V
AL
5
C13, C46, C34, C48, C29
10µF
10%
10V
10
C15, C18, C30, C31, C32,
C33, C42, C43, C44, C45
22µF
20%
1
C17
330u
4
C47, C26, C28, C35
1µF
2
C27, C36
4
C38, C39, C41, C37
1
PCB FOOTPRINT
MLF44_7X7_XX
MFR
Intersil-Zilker
Labs
PART NUMBER
ZL8800ALAFTK
SM1210
Taiyo Yuden
JMK325BJ107MY-T
SM7343P
Panasonic
EEF-SX0D471E4
X5R
SM0805
Taiyo Yuden
LMK212B7106KG-TD
16V
X5R
SM1206
Murata
GRM31CR61C226ME15L
20%
16V
AL POLY
SM_CAP_10.5X10.5
UNITED CHEMI APXA160ARA331MJC0G
20%
16V
X7R
SM0603
TDK
100p
5%
50V
NPO
SM0402_WSS
MURATA
GRM1555C1H101JZ01D
10µ
0.2
16V
X5R
SM0603
Taiyo Yuden
EMK107BBJ106MA-T
C40
2.2µ
10%
25V
X5R
SM0805
MURATA
GRM21BR71E225KA73L
2
L1, L2
0.231µH
5%
35A
FERRITE
IND_SLC1175
Coil Craft
SLC1175-231ME_
2
Q6, Q3
FDMF5821DC
-
60A/20V
DR MOS
2
Q2, Q4
2N3904
-
40V
NPN
2
R1, R33
100k
1%
63mW
1
R2
6.65k
1%
1
R3
100
1
R7
5mΩ
2
R16, R11
2
C1608X7R1C105K
PQFN40_5X5_P5S
Fairchild
FDMF5821DC
SOT-23
ON SEMI
MMBT3904LT1G
THK FILM
SM0603
Panasonic
ERJ-3EKF1003V
63mW
THK FILM
SM0603
Panasonic
ERJ-3EKF6651V
1%
100mW
THK FILM
SM0805
Panasonic
ERJ-6ENF1000V
1%
3W
THK FILM
WSL3637
Vishay Dale
WSL36375L000FEA
1
5%
63mW
THK FILM
SM0603
Panasonic
ERJ-2RKF1R00X
R10, R12
953
1%
63mW
THK FILM
SM0603
Panasonic
ERJ-3EKF9530V
1
R18
28.7k
1%
50mW
THK FILM
SM0402
Panasonic
ERJ-3EKF2872V
1
R25
31.6k
1%
63mW
THK FILM
SM0603
Panasonic
ERJ-3EKF3162V
0
R26
90.9k
1%
63mW
THK FILM
SM0603
Panasonic
ERJ-3EKF9092V
2
R17, R13
30k
5%
63mW
THK FILM
SM0603
Panasonic
ERJ-3GEYJ303V
2
R14, R15
3.3Ω
5%
63mW
THK FILM
SM0603
Panasonic
ERJ-3GEYJ3R3V
DEMONSTRATION BOARD SPECIFIC AUXILIARY PARTS BILL OF MATERIALS
2
R30, R31
392
1%
0
R24
NOT USED
-
1
R8
4.75k
1%
63mW
THK FILM
SM0603
Panasonic
ERJ-2RKF4751X
4
R4, R5, R6, R32
10.0k
1%
63mW
THK FILM
SM0603
Panasonic
ERJ-2RKF1002X
2
P2
JACK_BANANA
-
15A
-
JACK_F_NI_2P.750SP
EMERSON
108-0740-001
2
D3, D4
GREEN
-
2V, 20mA
LED
SM0805
CHICAGO MINI CMD17-21VGC/TR8
1
EN1
SW_SPDT
-
-
PCB VERT
3
J1, J2, J105
2 POS
-
-
VERT
2
J8, J9
HDR_3X2_RA
-
-
RA
HDRMDUALRA100X100 SAMTEC
TSW-103-08-T-D-RA
2
J10, J11
SKT_3X2_RA
-
-
RA
HDRFDUALRA100X100 SAMTEC
SSQ-103-02-T-D-RA
4
J101, J102, J103, J104
VOUT+, PGND
-
-
-
1
C14
10µF
10%
10V
X5R
0
VDD
TP
-
Red
0
GND
TP
-
Black
5
63mW
THK FILM
SM0603
Panasonic
ERJ-3EKF3920V
-
SM0603
-
-
SW_TOG_SPDT
NKK
G12AP
SIP2/100
SAMTEC
TSW-102-07-L-S
JACK_F_.175PLUG
Burndy
KPA8CTP
SM1206
Murata
GRM31CR61A106KA01L
PC Test Point TP_036H_SSREF
Keystone
Electronics
5000
PC Test Point TP_036H_SSREF
Keystone
Electronics
5001
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October 31, 2013
Application Note 1901
Configuration File
The following text is loaded into the ZL8800 device on the
ZL8800-2PH-DEMO1Z as default settings. Each PMBus
command is loaded via the PowerNavigator software. The #
symbol is used for a comment line.
# Initialize device to factory settings
RESTORE_FACTORY
STORE_DEFAULT_ALL
STORE_USER_ALL
### Begin Default Store
RESTORE_DEFAULT_ALL
# Global commands
FREQUENCY_SWITCH
0xfb20
# 400 kHz
VIN_OV_FAULT_LIMIT
0xd380
# 14 V
VIN_OV_FAULT_RESPONSE
0xff
VIN_OV_WARN_LIMIT
0xd360
# 13.5 V
VIN_UV_WARN_LIMIT
0xca40
# 4.5 V
VIN_UV_FAULT_LIMIT
0xca00
#4V
VIN_UV_FAULT_RESPONSE
0xff
IIN_CAL_GAIN
0xca80
# 5 mV/A
DDC_ENG
0xa5a
USER_GLOBAL_CONFIG
0x100
VMON_OV_FAULT_RESPONSE
0x80
VMON_UV_FAULT_RESPONSE
0x80
PRIVATE_PASSWORD
PUBLIC_PASSWORD
UNPROTECT
0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
FFFFFFFFFFFFFF
# PAGE 0 commands
PAGE
0x0
ON_OFF_CONFIG
0x17
VOUT_COMMAND
0x2666
# 1.2 V
VOUT_TRIM
0x0
#0V
VOUT_CAL_OFFSET
0x0
#0V
VOUT_MAX
0x4000
#2V
VOUT_MARGIN_HIGH
0x2852
# 1.26 V
VOUT_MARGIN_LOW
0x247b
# 1.14 V
VOUT_TRANSITION_RATE
0xba00
# 1 mV/us
VOUT_DROOP
0x0
# 0 mV/A
INTERLEAVE
0x0
IOUT_CAL_GAIN
0xb127
# 0.288 mV/A
IOUT_CAL_OFFSET
0xbe00
# -1 A
VOUT_OV_FAULT_LIMIT
0x2a6f
# 1.326 V
VOUT_OV_FAULT_RESPONSE
0x80
VOUT_UV_FAULT_LIMIT
0x225e
# 1.074 V
VOUT_UV_FAULT_RESPONSE
0x80
IOUT_OC_FAULT_LIMIT
0xe370
# 55 A
IOUT_UC_FAULT_LIMIT
0xe490
# -55 A
OT_FAULT_LIMIT
0xebe8
# 125 °C
OT_FAULT_RESPONSE
0x80
OT_WARN_LIMIT
0xeb70
# 110 °C
UT_WARN_LIMIT
0xdc40
# -30 °C
UT_FAULT_LIMIT
0xe530
# -45 °C
6
UT_FAULT_RESPONSE
0x80
POWER_GOOD_ON
0x228f
# 1.08 V
TON_DELAY
0xca80
# 5 ms
TON_RISE
0xca80
# 5 ms
TOFF_DELAY
0xca80
# 5 ms
TOFF_FALL
0xca80
# 5 ms
DEADTIME_MAX
0x3838
ISENSE_CONFIG
0x4204
USER_CONFIG
0x786
DDC_CONFIG
0x101
POWER_GOOD_DELAY
0xba00
# 1 ms
PID_TAPS
0x64
INDUCTOR
0xb114
# 0.27 uH
VOUT_MARGIN_RATIO
0xca80
#5%
OVUV_CONFIG
0x0
XTEMP_SCALE
0xba00
# 1 1/°C
XTEMP_OFFSET
0x8000
# 0 °C
TEMPCO_CONFIG
0xa7
DEADTIME
0x1010
DEADTIME_CONFIG
0x8080
ASCR_CONFIG
0x15a0100
SEQUENCE
0x0
TRACK_CONFIG
0x0
DDC_GROUP
0x0
MFR_IOUT_OC_FAULT_RESPONSE
0x80
MFR_IOUT_UC_FAULT_RESPONSE
0x80
IOUT_AVG_OC_FAULT_LIMIT
0xe230
# 35 A
IOUT_AVG_UC_FAULT_LIMIT
0xe5d0
# -35 A
SNAPSHOT_CONTROL
0x0
MFR_VMON_OV_FAULT_LIMIT
0xcb00
#6V
MFR_VMON_UV_FAULT_LIMIT
0xca00
#4V
# PAGE 1 commands
PAGE
0x1
VOUT_COMMAND
0x2666
# 1.2 V
VOUT_MAX
0x4000
#2V
VOUT_MARGIN_HIGH
0x2852
# 1.26 V
VOUT_MARGIN_LOW
0x247b
# 1.14 V
IOUT_CAL_GAIN
0xb127
# 0.288 mV/A
IOUT_CAL_OFFSET
0xbe00
# -1 A
VOUT_OV_FAULT_LIMIT
0x2a6f
# 1.326 V
VOUT_UV_FAULT_LIMIT
0x225e
# 1.074 V
IOUT_OC_FAULT_LIMIT
0xe370
# 55 A
IOUT_UC_FAULT_LIMIT
0xe490
# -55 A
POWER_GOOD_ON
0x228f
# 1.08 V
USER_CONFIG
0x786
DDC_CONFIG
0x2101
INDUCTOR
0xb114
# 0.27 uH
TEMPCO_CONFIG
0xa7
IOUT_AVG_OC_FAULT_LIMIT
0xe230
# 35 A
IOUT_AVG_UC_FAULT_LIMIT
0xe5d0
# -35 A
MFR_VMON_OV_FAULT_LIMIT
0xcb00
#6V
MFR_VMON_UV_FAULT_LIMIT
0xca00
#4V
STORE_DEFAULT_ALL
### End Default Store
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Application Note 1901
Measured Data
The following data was acquired using a ZL8800-2PH-DEMO1Z Rev B demonstration board.
MEASURED OUTPUT CURRENT (A)
35
30
MEASURED
25
IDEAL
20
15
10
5
0
0
5
10
15
20
25
30
35
ACTUAL OUTPUT CURRENT (A)
FIGURE 4. OUTPUT CURRENT MEASUREMENT ACCURACY (Single Phase)
100
100
90
90
80
VOUT = 1.8V
VOUT = 1.5V
VOUT = 1.2V
VOUT = 1V
VOUT = 0.8V
70
60
EFFICIENCY (%)
EFFICIENCY (%)
80
50
60
50
40
40
30
30
20
0
10
20
30
40
50
20
60
VOUT = 1.8V
VOUT = 1.5V
VOUT = 1.2V
VOUT = 1V
VOUT = 0.8V
70
0
10
FIGURE 5. EFFICIENCY, V IN = 12V, f SW = 300kHz
100
90
90
40
50
60
80
EFFICIENCY (%)
80
EFFICIENCY (%)
30
FIGURE 6. EFFICIENCY, V IN = 5V, f SW = 300kHz
100
VOUT = 1.8V
70
VOUT = 1.5V
VOUT = 1.2V
60
VOUT = 1V
50
VOUT = 0.8V
VOUT = 1.8V
70
VOUT = 1.5V
60
VOUT = 1.2V
VOUT = 1V
50
40
40
30
30
20
20
LOAD CURRENT (A)
LOAD CURRENT (A)
0
10
20
30
40
50
LOAD CURRENT (A)
FIGURE 7. EFFICIENCY, V IN = 12V, f SW = 400kHz
7
60
20
VOUT = 0.8V
0
10
20
30
40
50
60
LOAD CURRENT (A)
FIGURE 8. EFFICIENCY, V IN = 5V, f SW = 400kHz
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Application Note 1901
Measured Data
The following data was acquired using a ZL8800-2PH-DEMO1Z Rev B demonstration board. (Continued)
100
100
90
90
80
VOUT = 1.8V
70
VOUT = 1.5V
60
VOUT = 1.2V
EFFICIENCY (%)
EFFICIENCY (%)
80
VOUT = 1V
50
VOUT = 0.8V
VOUT = 1.8V
70
VOUT = 1.5V
60
VOUT = 1.2V
VOUT = 1V
50
40
40
30
30
20
0
10
20
30
40
50
60
LOAD CURRENT (A)
20
VOUT = 0.8V
0
10
20
30
40
50
FIGURE 9. EFFICIENCY, V IN = 12V, f SW = 516kHz
FIGURE 10. EFFICIENCY, VIN = 5V, f SW = 516kHz
FIGURE 11. RAMP UP
FIGURE 12. RAMP DOWN
FIGURE 13. STEP RESPONSE, 20A TO 40A @ 5A/µs, ASCR = 1200
TOTAL DEVIATION WINDOW 25mV = 2.5%
FIGURE 14. STEP RESPONSE, 20A TO 40A @ 5A/µs, ASCR = 400
TOTAL DEVIATION WINDOW 50mV = 5%
8
60
LOAD CURRENT (A)
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
FIGURE 15. PCB - TOP ASSEMBLY
9
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 16. PCB - TOP LAYER
10
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 17. PCB - INNER LAYER 1 (TOP VIEW)
11
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 18. PCB - INNER LAYER 2 (TOP VIEW)
12
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 19. PCB - INNER LAYER 3 (TOP VIEW)
13
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 20. PCB - INNER LAYER 4 (TOP VIEW)
14
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 21. PCB - BOTTOM LAYER (TOP VIEW)
15
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Application Note 1901
ZL8800-2PH-DEMO1Z Board Layout
(Continued)
FIGURE 22. PCB - BOTTOM ASSEMBLY (TOP VIEW)
Related Tools and Documentation
DOCUMENT
FN7558
DESCRIPTION
ZL8800 Datasheet, “Dual Channel/Dual Phase PMBus™ ChargeMode Control DC/DC Digital Controller”
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
16
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