ISL6745 Intersil Corporation, ISL6745 Datasheet

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ISL6745

Manufacturer Part Number
ISL6745
Description
Bridge Controller
Manufacturer
Intersil Corporation
Datasheet

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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
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.
ISL6745AU
ISL6745AUZ
(See Note)
PART NUMBER
TEMP. RANGE
-40 to 105
-40 to 105
(°C)
®
1
10 Ld MSOP
10 Ld MSOP
(Pb-free)
Data Sheet
PACKAGE
M10.118
M10.118
DWG. #
PKG.
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Precision Duty Cycle and Deadtime Control
• 100
• 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
September 1, 2005
µ
A Start-up Current
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004-2005. All Rights Reserved
VERR
RTD
SS 1
CS
CT
2
4
5
3
ISL6745 (MSOP)
TOP VIEW
www.DataSheet4U.com
10
9
8
7
6
VDD
VDDP
OUTB
OUTA
GND
ISL6745
FN9161.6

Related parts for ISL6745

ISL6745 Summary of contents

Page 1

... 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. ...

Page 2

Internal Architecture V DD UVLO + - INTERNAL BG OT SHUTDOWN 130 - 150 C GND R 2 RTD V BIAS 160 PEAK 2 VALLEY 0 ...

Page 3

... Machine Model (Per JEDEC22 std. Method A115-A .Class A Operating Conditions Temperature Range ISL6745AU . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 105°C Supply Voltage Range (Typical 9-16 VDC CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied ...

Page 4

... Fall Time THERMAL PROTECTION Thermal Shutdown Thermal Shutdown Clear Hysteresis, Internal Protection NOTES: 3. Specifications at -40°C are guaranteed by design, not production tested. 4. Guaranteed by design, not 100% tested in production. 4 ISL6745 < 16V 51.1kΩ 470pF -40°C to 105°C (Note 4), Typical values are ...

Page 5

... Typical Performance Curves 0.01 0.02 0.03 0.04 0.05 0.06 RTD CURRENT (mA) FIGURE 1. OSCILLATOR CT DISCHARGE CURRENT GAIN 600 500 400 300 200 100 0 100 200 300 400 500 600 CT (pF) FIGURE 3. CAPACITANCE vs OSCILLATOR FREQUENCY (RTD = 49.9kΩ) 5 ISL6745 1-10 1-10 100 0.07 0.08 0.09 0.1 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 700 800 900 1000 1.07 1.06 1.05 1.04 1.03 1.02 1.01 1.00 0.99 0. RTD (kΩ ...

Page 6

... Functional Description Features The ISL6745 PWM is an excellent choice for low cost bridge topologies for applications requiring accurate frequency and deadtime control. Among its many features are 1A FET drivers, adjustable soft-start, overcurrent protection and internal thermal protection, allowing a highly flexible design with minimal external components ...

Page 7

... The soft-start voltage is clamped to 4V. Gate Drive The ISL6745 is capable of sourcing and sinking 1A peak current, and may also be used in conjunction with a MOSFET driver such as the ISL6700 for level shifting. To limit the peak current through the IC, an external resistor may be placed between the totem-pole output of the IC (OUTA or OUTB pin) and the gate of the MOSFET ...

Page 8

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 8 ISL6745 ISL6745 M10.118 (JEDEC MO-187BA) 10 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE SYMBOL A ...

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