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Application Note 1545
Author: Jia Wei
ISL62884CEVAL2Z Evaluation Board User Guide
Hardware Description
The ISL62884CEVAL2Z evaluation board demonstrates
the performance of the ISL62884C single-phase
synchronous-buck PWM V CORE controller implementing
Intel IMVP-6 protocol. The ISL62884C features Intersil's
Robust Ripple Regulator (R 3 ? ) technology. An on-board
dynamic-load generator is included for evaluating the
transient-load response. It applies a 300μs pulse of
approximately 0.25 Ω load across V O and PGND.
Contents of this document include:
? Design Criteria
? Recommended Test Equipment
? Interface Connections
? Switch Descriptions
? DIP Switch Descriptions
? Jumper Descriptions
? Test Point Descriptions
? Evaluation Board Documentation
Interface Connections
? V IN : Input Voltage to the Power Stage
- J5: V IN Positive Power Input
- TP31: V IN Positive Voltage Sense
- J6: V IN Return Power Input
- TP32: V IN Return Voltage Sense
? V O: Regulated Output Voltage
- J12: V O Positive Power Output
- J14: V O Return Power Output
? +5V: +5V Input Voltage
- TP29: +5V Positive Input
- TP30: +5V Return Input
? +12V: Input Voltage for the Dynamic-load Generator
- TP3: 12V Positive Input
- TP2: 12V Return Input
Test Set-Up
- Bill of materials
- Schematic
TP18 TP14
RTN VSEN
on
S3
off
- Silk-screen plots
- Board layer plots
_
Vin
J6
PGND
D1
1
0
S1
0 U2 1
VID0
VID1
VID2
TABLE 1. DC/DC DESIGN CRITERIA
+
J5
VIN
VID3
VID4
VID5
VID6
_ 5V
PARAMETER
V IN
V O
Full-load
PWM Frequency
VALUE
4.5 to 20
0 to 1.5
60
300
UNITS
VDC
VDC
ADC
kHz
TP3
TP2
ISL62884CEVAL2Z
+3.3V
J16 TP37
TP29
+5V
TP30
PGND
J12
VCORE
+
Recommended Equipment
? (Qty. 1) Adjustable 25V, 10A Power Supply
? (Qty. 1) Fixed 5V, 100mA Power Supply
on
S2
off
J10
VCORE
J14
PGND
? (Qty. 1) Fixed 12V, 100mA Power Supply
? (Qty. 1) Adjustable Constant Current Electronic Load
? (Qty. 1) Digital Voltmeter
? (Qty. 1) Four-Channel Oscilloscope
FIGURE 1. TEST SET-UP
Switch Descriptions
? S3: Enable
- OFF: Short the VR_ON pin to GND (disable PWM)
- ON: Allow the VR_ON pin to pull-up to +5V (enable
PWM)
? S2: Dynamic Load
- OFF: On-board dynamic load disabled
- ON: On-board dynamic load enabled
April 28, 2010
AN1545.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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