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ISL78171EVAL1Z Evaluation Board User Guide
Description
This quick start guide pertains to the ISL78171EVAL1Z
Evaluation Board. This board is populated with 60 LEDs in
6P10S (six parallel strings, each string consisting of 10 LEDs in
series) configuration to simplify evaluation and testing. The
device can function with or without an I
2
C controller. If it is
required to use I
2
C control for the ISL78171EVAL1Z board, use
a generic I
2
C interface adapter (not supplied with the
evaluation board kit) for the purpose of communication.
Please note that the slave address on the
ISL78171
is
hexadecimal 58. Please refer to the quick setup guides for
jumper settings and power-up instructions.
Specifications
This board has been configured and optimized for the following
operating conditions:
• Input voltage: 4.5V to 26.5V
• Output voltage: 32V typical and 40V max
• LED string current 20mA typical
PCB Details
Board dimension = 5.525x2.550inch
Number of layers = 2
Type = FR4
Copper thickness = 2oz
Key Features
• Integrated 40V boost converter
• 6 Precision current sinks, up to 50mA each
• Current matching ±0.7% typical
• Dimming modes: DC, internal PWM, direct PWM,
DC + Int/Dir PWM
• Typical dimming ratio exceeding 60,000:1 for DC + Int/Dir
PWM
• Phase shift control for internal PWM dimming
• 600kHz/800kHz/1.2MHz I
2
C selectable switching
frequency
• Dynamic headroom control
References
ISL78171
Datasheet
Ordering Information
PART NUMBER
DESCRIPTION
ISL78171EVAL1Z
ISL78171 Evaluation Board
FIGURE 1. ISL78171EVAL1Z FRONT SIDE
User Guide 035
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Copyright Intersil Americas LLC 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
June 15, 2015
UG035.0
