ISL6740 Datasheet, PDF (1/29 Pages) Intersil Corporation – Flexible Double Ended Voltage and Current Mode PWM Controllers

®
Data Sheet
ISL6740, ISL6741
July 13, 2007
FN9111.4
Flexible Double Ended Voltage and
Current Mode PWM Controllers
The ISL6740, ISL6741 family of adjustable frequency, low
power, pulse width modulating (PWM) voltage mode
(ISL6740) and current mode (ISL6741) controllers is
designed for a wide range of power conversion applications
using half-bridge, full bridge, and push-pull configurations.
These controllers provide an extremely flexible oscillator that
allows precise control of frequency, duty cycle, and
deadtime.
This advanced BiCMOS design features low operating
current, adjustable switching frequency up to 1MHz,
adjustable soft-start, internal and external over-temperature
protection, fault annunciation, and a bidirectional SYNC
signal that allows the oscillator to be locked to paralleled
units or to an external clock for noise sensitive applications.
Ordering Information
PART
PART
TEMP.
PKG.
NUMBER MARKING RANGE (°C) PACKAGE DWG. #
ISL6740IB ISL6740IB -40 to +105 16 Ld SOIC M16.15
ISL6740IBZ 6740IBZ
(See Note)
-40 to +105 16 Ld SOIC M16.15
(Pb-free)
ISL6740IV ISL67 40IV -40 to +105 16 Ld TSSOP M16.173
ISL6740IVZ ISL67 40IVZ -40 to +105 16 Ld TSSOP M16.173
(See Note)
(Pb-free)
ISL6741IB ISL6741IB -40 to +105 16 Ld SOIC M16.15
ISL6741IBZ 6741IBZ
(See Note)
-40 to +105 16 Ld SOIC M16.15
(Pb-free)
ISL6741IV ISL67 41IV -40 to +105 16 Ld TSSOP M16.173
ISL6741IVZ ISL67 41IVZ -40 to +105 16 Ld TSSOP M16.173
(See Note)
(Pb-free)
Add -T suffix 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.
x = CONTROL MODE
0
Voltage Mode
1
Current Mode
Features
• Precision Duty Cycle and Deadtime Control
• 95μA Startup Current
• Adjustable Delayed Overcurrent Shutdown and Re-start
(ISL6740)
• Adjustable Short Circuit Shutdown and Re-start
• Adjustable Oscillator Frequency Up to 2MHz
• Bidirectional Synchronization
• Inhibit Signal
• Internal Over-Temperature Protection
• System Over-Temperature Protection Using a Thermistor
or Sensor
• Adjustable Soft-start
• Adjustable Input Undervoltage Lockout
• Fault Signal
• Tight Tolerance Voltage Reference Over Line, Load, and
Temperature
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• DC Transformers and Buss Regulators
Pinout
ISL6740, ISL6741
(16 LD SOIC, 16 LD TSSOP)
TOP VIEW
OUTA 1
GND 2
SCSET 3
C_T 4
SYNC 5
CS 6
V_ERROR 7
UV 8
16 OUTB
15 V_REF
14 V_DD
13 R_TD
12 R_TC
11 OTS
10 FAULT
9 SS
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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