ISL6844EVAL2 Intersil, ISL6844EVAL2 Datasheet

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ISL6844EVAL2

Manufacturer Part Number
ISL6844EVAL2
Description
EVALUATION BOARD 2 ISL6844
Manufacturer
Intersil
Datasheets

Specifications of ISL6844EVAL2

Main Purpose
Special Purpose DC/DC, Power Over Ethernet
Outputs And Type
1, Isolated
Power - Output
11W
Voltage - Output
3.3V
Current - Output
3.35A
Voltage - Input
36 ~ 57V
Regulator Topology
Flyback
Board Type
Fully Populated
Utilized Ic / Part
ISL6844
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Frequency - Switching
-
Improved Industry Standard Single-Ended
Current Mode PWM Controller
The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844,
ISL6845 family of adjustable frequency, low power, pulse
width modulating (PWM) current mode controllers is
designed for a wide range of power conversion applications
including boost, flyback, and isolated output configurations.
Peak current mode control effectively handles power
transients and provides inherent overcurrent protection.
This advanced BiCMOS design is pin compatible with the
industry standard 384x family of controllers and offers
significantly improved performance. Features include low
operating current, 60µA start-up current, adjustable
operating frequency to 2MHz, and high peak current drive
capability with 20ns rise and fall times.
Pinouts
PART NUMBER
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
ISL6840
ISL6841
ISL6842
ISL6843
ISL6844
ISL6845
COMP
RTCT
COMP
CS
FB
RTCT
CS
FB
RISING UVLO (V) MAX. DUTY CYCLE (%)
1
2
3
4
(8 LD SOIC, MSOP)
1
2
3
4
(8 LD DFN)
TOP VIEW
TOP VIEW
14.4
14.4
7.0
7.0
8.4
8.4
®
1
Data Sheet
8
7
5
6
8
7
6
5
VREF
VDD
OUT
GND
VREF
VDD
OUT
GND
100
100
100
50
50
50
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 1A MOSFET Gate Driver
• 60µA Start-up Current, 100µA Maximum
• 25ns Propagation Delay Current Sense to Output
• Fast Transient Response with Peak Current Mode Control
• Adjustable Switching Frequency to 2MHz
• 20ns Rise and Fall Times with 1nF Output Load
• Trimmed Timing Capacitor Discharge Current for Accurate
• High Bandwidth Error Amplifier
• Tight Tolerance Voltage Reference Over Line, Load, and
• Tight Tolerance Current Limit Threshold
• Pb-Free Available (RoHS Compliant)
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• PC Power Supplies
• Isolated Buck and Flyback Regulators
• Boost Regulators
Deadtime/Maximum Duty Cycle Control
Temperature
Copyright Intersil Americas Inc. 2004, 2005, 2007, 2008. All Rights Reserved
ISL6840, ISL6841, ISL6842,
August 7, 2008
All other trademarks mentioned are the property of their respective owners.
ISL6843, ISL6844, ISL6845
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
FN9124.10

Related parts for ISL6844EVAL2

ISL6844EVAL2 Summary of contents

Page 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 Inc. 2004, 2005, 2007, 2008. All Rights Reserved ISL6843, ISL6844, ISL6845 FN9124.10 | Intersil (and design registered trademark of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners. ...

Page 2

... NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. ...

Page 3

Functional Block Diagram VDD UVLO COMPARATOR + - + BG - GND A 2. 0.5 CS ERROR AMPLIFIER + - FB COMP VREF 2.6V 0.7V OSCILLATOR COMPARATOR - RTCT + CLOCK 8.4mA ON V REF 5.00V ENABLE V ...

Page 4

Typical Application - 48V Input Dual Output Flyback VIN+ R1 36V TO 75V C1 VIN VR1 CR2 C5 CR6 R22 R27 U4 R26 COMP CS FB RTCT ISL684x R10 CR1 C8 CR5 ...

Page 5

Typical Application - Boost Converter L1 VIN+ C1 VIN- R8 C10 CR1 VREF COMP VDD FB CS OUT C4 RTCT GND R3 C7 +VOUT + C2 C3 RETURN VIN ...

Page 6

... MSOP Package (Note Maximum Junction Temperature . . . . . . . . . . . . . . .-55°C to +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = 15V (Note 6 +25°C. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise ...

Page 7

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” and “Typical Application” schematic on pages 3 and 4. V values are at T specified. Temperature limits established by characterization and ...

Page 8

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Typical Performance Curves 1.02 1.01 1.00 0.99 0.98 0.97 -40 - TEMPERATURE (°C) FIGURE 1. FREQUENCY vs TEMPERATURE 1.002 1.000 0.998 0.996 0.994 -40 -25 - TEMPERATURE (°C) ...

Page 9

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 and the MOSFET gate charge, Qg, the average output current can be calculated in Equation 5: × OUT To optimize noise immunity, bypass V ceramic capacitor as close to the ...

Page 10

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: ...

Page 11

ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Mini Small Outline Plastic Packages (MSOP -B- INDEX 0.20 (0.008 AREA TOP VIEW 0.25 (0.010) GAUGE PLANE SEATING PLANE - 0.10 (0.004) b -H- - ...

Page 12

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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