ISL6744资料

Operating Conditions
Temperature Range ISL6744AU . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 105°C Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . . . 9-16 VDC
Add “-T” suffix for tape and reel. 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.
NOTES: 1. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 2. All voltages are to be measured with respect to GND, unless otherwise specified.
SP1 VIN+ QR1 L1 C2 QH L3 T1 R8 C13 C9 C8 RTN C11 QR3 +12V
TP1
R10
L2
3
VIN-
C1 T2 R9
R2 CR3
QL C14 R11
QR2
QR4
C12
C3 R1 C7 U4 ISL6700 VDD HB HO HS C4 C5 TP5 LO VSS LI HI TP4 CR1 R5
2
VBIAS SS CLAMP RTD 2.0 V IRTD + 4.0 V VBIAS 160 uA ON 2.8 V + CT 0.8 V + VALLEY PEAK
S R Q Q S R Q Q
ON
SS
+ + SS CHARGED 3.9 V
15 uA
OC LATCH CLK
ISL6744
Q Q
Thermal Information
Thermal Resistance (Typical, Note 1) θJA (°C/W) 8 Lead MSOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 8 Lead SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Maximum Junction Temperature . . . . . . . . . . . . . . . . -55°C to 150°C Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
Features
• Precision Duty Cycle and Deadtime Control • 100µA Start-up Current • Adjustable Delayed Overcurrent Shutdown and Restart • 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)
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . GND - 0.3V to +20.0V OUTA, OUTB . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VDD Signal Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 5V Peak GATE Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A ESD Classification Human Body Model (Per MIL-STD-883 Method 3015.7) . . .2000V Machine Model (Per EIAJ ED-4701 Method C-111) . . . . . . . .100V Charged Device Model (Per EOS/ESD DS5.3, 4/14/93) . . .1000V
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004-2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
Ordering Information
PART NUMBER ISL6744AU ISL6744AUZ (Note) ISL6744AB ISL6744ABZ (Note) TEMP. RANGE (°C) -40 to 105 -40 to 105 -40 to 105 -40 to 105 PACKAGE 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld SOIC 8 Ld SOIC (Pb-free) PKG. DWG. # M8.118 M8.118 M8.15 M8.15
元器件交易网
®
ISL6744
Data Sheet September 22, 2005 FN9147.8
Intermediate Bus PWM Controller
The ISL6744 is a low cost, primary side, double-ended controller intended for applications using full and half-bridge topologies for unregulated DC/DC converters. It is a voltagemode PWM controller designed for half-bridge and fullbridge power supplies. It provides precise control of switching frequency, adjustable soft-start, precise deadtime control with deadtimes as low as 35ns, and overcurrent shutdown. Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults.
VBIAS
CS MPARATOR CT + -
FN9147.8 September 22, 2005
SS 0.8
元器件交易网
Typical Application using ISL6744 - 48V Input DC Transformer, 12V @ 8A Output
CR2 TP2 R6
ISL6744
C10
U1 SS
GND
ISL6744
OUTB OUTA VDD R7 TP6 Q5 C15 D2
CS CT RTD C18
FN9147.8 September 22, 2005
C16 D1 R12 C6
元器件交易网
ISL6744
Absolute Maximum Ratings
RESET DOMINANT
50 µS RETRIGGERABLE ONE SHOT
SS LOW
+ SS
0.27 V
FAULT LATCH SET DOMINANT
S Q Q S R Q Q
FL
IDCH
R
ON
PWM LATCH SET DOMINANT VBIAS UV 4.65V ↓ 4.80V ↑ OC DETECT + BG
Applications
• Telecom and Datacom Isolated Power • DC Transformers • Bus Converters
Pinout
ISL6744 (SOIC, MSOP) TOP VIEW
SS 1 RTD 2 CS 3 CT 4 8 VDD 7 OUTB 6 OUTA 5 GND
元器件交易网
Internal Architecture
VDD VBIAS 5.00 V VBIAS
Q
FL
VDD
OUTA
+ BG
UVLO
T Q
OUTB VBIAS 70uA
PWM TOGGLE
INTERNAL OT SHUTDOWN 130 - 150 C
GND
I DCH= 55 x IRTD