ISL6842 Datasheet, PDF (1/9 Pages) Intersil Corporation – Improved Industry Standard Single Ended Current Mode PWM Controller

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Data Sheet
ISL6842, ISL6843, ISL6844, ISL6845
October 2003
FN9124.1
Improved Industry Standard Single Ended
Current Mode PWM Controller
The 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 over-current 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.
Ordering Information
TEMP. RANGE
PART NUMBER
(^oC)
PACKAGE
PKG.
DWG. #
ISL6842IB
-40 to 105 8 Ld SOIC M8.15
ISL6842IU
-40 to 105 8 Ld MSOP M8.118
ISL6843IB
-40 to 105 8 Ld SOIC M8.15
ISL6843IU
-40 to 105 8 Ld MSOP M8.118
ISL6844IB
-40 to 105 8 Ld SOIC M8.15
ISL6844IU
-40 to 105 8 Ld MSOP M8.118
ISL6845IB
-40 to 105 8 Ld SOIC M8.15
ISL6845IU
-40 to 105 8 Ld MSOP M8.118
NOTE: Add -T to part number for Tape and Reel packaging.
PART NUMBER
ISL6842
ISL6843
ISL6844
ISL6845
RISING UVLO
14.4V
8.4V
14.4V
8.4V
MAX. DUTY CYCLE
100%
100%
50%
50%
Features
• 1A MOSFET gate driver
• 60µA startup current, 100µA maximum
• 30ns 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
deadtime/maximum duty cycle control
• High bandwidth error amplifier
• Tight tolerance voltage reference over line, load, and
temperature
• Tight tolerance current limit threshold
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
ISL6842, ISL6843, ISL6844, ISL6845
(8-PIN SOIC, MSOP)
TOP VIEW
COMP 1
FB 2
CS 3
RTCT 4
8 VREF
7 VDD
6 OUT
5 GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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