Flexible Double Ended Voltage and Current Mode PWM
Controllers
ISL6740, ISL6741
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.
Features
• Precision Duty Cycle and Deadtime Control
• 95µA Start-up 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
PACKAGE
16 Ld SOIC
(Pb-free)
16 Ld TSSOP
(Pb-free)
16 Ld SOIC
16 Ld SOIC
(Pb-free)
16 Ld TSSOP
(Pb-free)
PKG.
DWG. #
M16.15
M16.173
M16.15
M16.15
M16.173
Ordering Information
PART
NUMBER
(Notes 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
-40 to +105
-40 to +105
-40 to +105
-40 to +105
-40 to +105
• Fault Signal
• Tight Tolerance Voltage Reference Over Line, Load, and
Temperature
• Pb-Free Available (RoHS Compliant)
ISL6740IBZ 6740IBZ
(Note 1)
ISL6740IVZ
(Note 1)
ISL6741IB
ISL67 40IVZ
ISL6741IB
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• DC Transformers and Buss Regulators
ISL6741IBZ 6741IBZ
(Note 1)
ISL6741IVZ
(Note 1)
NOTES:
ISL67 41IVZ
1. Add “-T*” suffix for tape and reel. Please refer to
TB347
for details
on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information
page for
ISL6740, ISL6741.
For more information on MSL please
see techbrief
TB363.
ISL674x
x
=
0
1
Pin Configuration
ISL6740, ISL6741
(16 LD SOIC, 16 LD TSSOP)
TOP VIEW
OUTA 1
GND 2
SCSET 3
C
T
4
SYNC 5
CS 6
16 OUTB
15 V
REF
14 V
DD
13 R
TD
12 R
TC
11 OTS
10 FAULT
9 SS
CONTROL MODE
Voltage Mode
Current Mode
V
ERROR
7
UV 8
December 2, 2011
FN9111.6
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. 2003, 2004, 2007, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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