ISL8840AMBEPZ Datasheet, PDF (1/10 Pages) Intersil Corporation – High Performance Industry Standard Single-Ended Current Mode PWM Controller

ISL8840AMBEPZ, ISL8841AMBEPZ, ISL8842AMBEPZ,
®
ISL8843AMBEPZ, ISL8844AMBEPZ, ISL8845AMBEPZ
Data Sheet
September 29, 2008
FN6792.0
High Performance Industry Standard
Single-Ended Current Mode PWM
Controller
The ISL884xAMBEPZ is a high performance drop-in
replacement for the popular 28C4x and 18C4x 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, 90µA
start-up current, adjustable operating frequency to 2MHz,
and high peak current drive capability with 20ns rise and fall
times.
PART NUMBER
ISL8840AMBEPZ
ISL8841AMBEPZ
ISL8842AMBEPZ
ISL8843AMBEPZ
ISL8844AMBEPZ
ISL8845AMBEPZ
RISING UVLO
(V)
7.0
7.0
14.4
8.4
14.4
8.4
MAX. DUTY CYCLE
(%)
100
50
100
100
50
50
Pinout
ISL884XAMBEPZ
(8 LD SOIC)
TOP VIEW
COMP 1
FB 2
CS 3
RTCT 4
8 VREF
7 VDD
6 OUT
5 GND
Features
• Full Mil-Temp Electrical Performance from -55°C to +125°C
• Controlled Baseline with One Wafer Fabrication Site and
One Assembly/Test Site
• Full Homogenous Lot Processing in Wafer Fab
• No Combination of Wafer Fabrication Lots in Assembly
• Full Traceability Through Assembly and Test by
Date/Trace Code Assignment
• Enhanced Process Change Notification
• Enhanced Obsolescence Management
• Eliminates Need for Up-Screening a COTS Component
• 1A MOSFET Gate Driver
• 90µA 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 (RoHS Compliant)
Applications
• Isolated Flyback and Forward Regulators
• Boost Regulators
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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