ISL6745 Datasheet, PDF (1/8 Pages) Intersil Corporation – Bridge Controller with Precision Dead Time Control

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Data Sheet
September 1, 2005
ISL6745
FN9161.6
Bridge Controller with Precision Dead
Time Control
The ISL6745 is a low-cost double-ended voltage-mode
PWM controller designed for half-bridge and full-bridge
power supplies and line-regulated bus converters. It
provides precise control of switching frequency, adjustable
soft-start, and overcurrent shutdown. In addition, the
ISL6745 allows for accurate adjustment of MOSFET non-
overlap time (“deadtime”) with deadtimes as low as 35ns,
allowing power engineers to optimize the efficiency of open-
loop bus converters. The ISL6745 also includes a control
voltage input for closed-loop PWM and line voltage feed-
forward functions.
Low start-up and operating currents allow for easy biasing in
both AC/DC and DC/DC applications. This advanced
BiCMOS design also features adjustable switching
frequency up to 1MHz, 1A FET drivers, and very low
propagation delays for a fast response to overcurrent faults.
The ISL6745 is available in a space-saving MSOP-10
package and is guaranteed to meet rated specifications over
a wide -40°C to 105°C temperature range.
Ordering Information
TEMP. RANGE
PART NUMBER
(°C)
PACKAGE
PKG.
DWG. #
ISL6745AU
-40 to 105 10 Ld MSOP M10.118
ISL6745AUZ
(See Note)
-40 to 105 10 Ld MSOP M10.118
(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.
Features
• Precision Duty Cycle and Deadtime Control
• 100µA Start-up Current
• Adjustable Delayed Overcurrent Shutdown and Re-Start
• Adjustable Oscillator Frequency Up to 2MHz
• 1A MOSFET Gate Drivers
• Adjustable Soft-Start
• Internal Over Temperature Protection
• 35ns Control to Output Propagation Delay
• Small Size and Minimal External Component Count
• Input Undervoltage Protection
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Half-bridge Converters
• Full-bridge Converters
• Line-regulated Bus Converters
• AC/DC Power Supplies
• Telecom, Datacom, and File Server Power
Pinout
ISL6745 (MSOP)
TOP VIEW
SS 1
RTD 2
VERR 3
CS 4
CT 5
10 VDD
9 VDDP
8 OUTB
7 OUTA
6 _GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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