Intersil ISL6228EVAL3Z User Manual

®
Introduction
The ISL6228EVAL3Z evaluation board demonstrates the
performance of the ISL6228 dual-channel PWM controller.
The ISL6228 features Intersil's Robust Ripple Regulator (R
technology. Channel-1 output voltage is 1.5V or 1.8V,
pending the state of switch S5. Channel-2 output voltage is
1.8V. Each channel has an on-board dynamic-load
generator included for evaluating the transient-load
response. It applies a 300µs pulse of 4.5A load across V
and GND, and it applies a 300µs pulse of 5A load across
V and GND.
O2
Contents of this document include:
• Recommended Test Equipment
• Interface Connections
• Switch Descriptions
• Test Point Descriptions
• Design Criteria
• Typical Performance
- Efficiency
- Start-up
- Shut-down
- Steady State, CCM
- Steady State, DCM
- Load-transient response
• Evaluation Board Documentation
- Bill of materials
- Schematic
- Silk-screen plots
- Board layer plots
TABLE 1. DC/DC DESIGN CRITERIA
PARAMETER
V
IN
V
O
Full-load
PWM Frequency
Application Note
O1
VALUE UNITS
3.3 to 25 VDC
0.6 to 5 VDC
8 ADC
270, 300 kHz
1
1-888-INTERSIL or 1-888-468-3774
ISL6228EVAL3Z User Guide
May 17, 2007
Recommended Equipment
• (QTY 2) Adjustable 25V, 3A Power Supply
• (QTY 1) Fixed 5V, 100mA Power Supply
3
)
• (QTY 1) Fixed 12V, 100mA Power Supply
• (QTY 1) Adjustable 20A Constant Current Electronic Load
• (QTY 1) Digital Voltmeter
• (QTY 1) Four-Channel Oscilloscope
Interface Connections
• V : Input voltage to the power stage of Channel-1
IN1
- J14: V positive power input
IN1
- TP20: V
IN1
- J14: V return power input
IN1
- TP21: V
IN1
• V : Input voltage to the power stage of Channel-2
IN2
- J1: V positive power input
IN2
- TP9: V positive voltage sense
IN2
- J2: V return power input
IN2
- TP10: V
IN2
• V Regulated output voltage from Channel-1
O1:
- J9: V positive power output
O1
- TP13: V
O1
- J10: V return power output
O1
- TP14: V
O1
• V : Regulated output voltage from Channel-2
O2
- J7: V positive power output
O2
- TP11: V positive voltage sense
O2
- J8: V return power output
O2
- TP12: V
O2
• VCC: +5V input voltage
- TP1: 5V positive input
- TP2: 5V return input
• +12V: Input voltage for the dynamic-load generator
- TP15: 12V positive input
- TP16: 12V return input
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
Author: Jia Wei
positive voltage sense
return voltage sense
return voltage sense
positive voltage sense
return voltage sense
return voltage sense
Copyright Intersil Americas Inc. 2007. All Rights Reserved
AN1291.0