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ISL8843 Datasheet(PDF) 1 Page - Intersil Corporation

Part No. ISL8843
Description  Industry Standard Single-Ended Current Mode PWM Controller
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL8843 Datasheet(HTML) 1 Page - Intersil Corporation

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1
®
FN9238.0
ISL8843
Industry Standard Single-Ended Current
Mode PWM Controller
The ISL8843 is an industry standard drop-in replacement for
the popular 28C43 and 18C43 PWM controllers suitable for
a wide range of power conversion applications including
boost, flyback, and isolated output configurations. Its fast
signal propagation and output switching characteristics
make this an ideal product for existing and new designs.
Features include 30V operation, low operating current, 90
µA
start-up current, adjustable operating frequency to 2MHz,
and high peak current drive capability with 20ns rise and fall
times.
Features
• 1A MOSFET gate driver
•90
µA start-up current, 125µA maximum
• 35ns propagation delay current sense to output
• Fast transient response with peak current mode control
• 30V operation
• Adjustable switching frequency to 2MHz
• 20ns rise and fall times with 1nF output load
• Trimmed timing capacitor discharge current for accurate
deadtime/maximum duty cycle control
• 1.5MHz bandwidth error amplifier
• Tight tolerance voltage reference over line, load, and
temperature
• ±3% current limit threshold
• Pb-free plus anneal available and ELV, WEEE, 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
Pinout
ISL8843
(8 LD SOIC, MSOP)
TOP VIEW
PART NUMBER
RISING UVLO
MAX. DUTY CYCLE
ISL8843
8.4V
100%
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE (°C) PACKAGE
PKG.
DWG. #
ISL8843ABZ
(See Note)
8843 ABZ
-40 to 105
8 Ld SOIC
(Pb-free)
M8.15
ISL8843AUZ
(See Note)
8843Z
-40 to 105
8 Ld MSOP
(Pb-free)
M8.118
ISL8843MBZ
(See Note)
8843 MBZ
-55 to 125
8 Ld SOIC
(Pb-free)
M8.15
ISL8843MUZ
(See Note)
843MZ
-55 to 125
8 Ld MSOP
(Pb-free)
M8.118
Add -T to part number for Tape and Reel packaging.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
COMP
FB
RTCT
VREF
VDD
OUT
GND
1
2
3
4
8
CS
7
6
5
Data Sheet
October 19, 2005
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. 2005 All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.


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