ISL8844A中文资料
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The ISL884xA is a high performance drop-in replacement for the popular 28C4x and 18C4x PWM controllers suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Its fast signal propagation and output switching characteristics make this an ideal product for existing and new designs.
Compliant
Applications
• Telecom and datacom power • Wireless base station power • File server power • Industrial power systems • PC power supplies • Isolated buck and flyback regulators • Boost regulators
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A (8 LD SOIC, MSOP) TOP VIEW
COMP 1 FB 2 CS 3
RTCT 4
8 VREF 7 VDD 6 OUT 5 GND
Features
• 1A MOSFET gate driver • 90μA start-up current, 125μA maximum • 35ns propagation delay current sense to output • Fast transient response with peak current mode control • 30V operation • Adjustable switching frequency to 2MHz • 20ns rise and fall times with 1nF output load • Trimmed timing capacitor discharge current for accurate
ISL8842AMBZ 8842 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8842AMUZ 42AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8843AABZ 8843 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
Ordering Information
PART NUMBER*
PART
TEMP. PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
ISL8840AABZ 8840 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
Features include 30V operation, low operating current, 90μA start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times.
VREF UV COMPARATOR
4.65V 4.80V
-+
PWM COMPARATOR
CS
+
100mV
-
FB COMP
+ -
ERROR AMPLIFIER
2R VF TOTAL = 1.15V R
1.1V CLAMP
ONLY ISL8841A/ ISL8844A/ ISL8845A
Q T
Q
VREF
ISL8840AAUZ 40AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8840AMBZ 8840 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8840AMUZ 40AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
deadtime/maximum duty cycle control • 1.5MHz bandwidth error amplifier • Tight tolerance voltage reference over line, load and
temperature • ±3% current limit threshold • Pb-free plus anneal available and ELV, WEEE, RoHS
元器件交易网
®
Data Sheet
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
April 18, 2007
FN6320.3
High Performance Industry Standard Single-Ended Current Mode PWM Controller
ISL8841AMUZ 41AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8842AABZ 8842 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8842AAUZ 42AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
Copyright © Intersil Americas Inc. 2005, 2006, 2007. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
元器件交易网
100k 150k RTCT
2.9V 1.0V
ON
OSCILLATOR COMPARATOR
<10ns
-
+
CLOCK
8.4mA
ON
SQ 36k
RQ
RESET DOMINANT
VREF OUT
元器件交易网 ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
ISL8845AABZ 8845 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8845AAUZ 45AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8845AMBZ 8845 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
元器件交易网 ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
Typical Application - 48V Input Dual Output Flyback
VIN+
36V TO 75V C1
R3
2
FN6320.3
April 18, 2007
FN6320.3 April 18, 2007
+-
3
Functional Block Diagram
VDD GND
START/STOP UV COMPARATOR
+
VDD OK
-
+-
2.5V
A A = 0.5
VREF 5.00V ENABLE
VREF FAULT +
ISL8841AABZ 8841 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8841AAUZ 41AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8841AMBZ 8841 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8844AAUZ 44AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8844AMBZ 8844 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8844AMUZ 44AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
PART NUMBER ISL8840A ISL8841A ISL8842A ISL8843A ISL8844A ISL8845A
RISING UVLO 7.0 7.0
14.4V 8.4V 14.4V 8.4V
MAX. DUTY CYCLE 100% 50% 100% 100% 50% 50%
Pinout
ISL8843AAUZ 43AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
Ordering Information (Continued)
PART NUMBER*
PART
TEMP. PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
C4
C2 R1
CR6
C3 Q1
CR5
T1
C21 + C15 R21
C5
CR2
CR4 + C22
+
C17
C19
C20
R16
R17
C6
U2
R1C16
+1.8V
RETURN R18
4
VIN-
R6 Q3
VR1
R4 CR1
R22 R27
U4
R26 COMP VREF
CS
V DD
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.
ISL8845AMUZ 45AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
*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.
ISL8843AMBZ 8843 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8843AMUZ 43AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8844AABZ 8844 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
Compliant
Applications
• Telecom and datacom power • Wireless base station power • File server power • Industrial power systems • PC power supplies • Isolated buck and flyback regulators • Boost regulators
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A (8 LD SOIC, MSOP) TOP VIEW
COMP 1 FB 2 CS 3
RTCT 4
8 VREF 7 VDD 6 OUT 5 GND
Features
• 1A MOSFET gate driver • 90μA start-up current, 125μA maximum • 35ns propagation delay current sense to output • Fast transient response with peak current mode control • 30V operation • Adjustable switching frequency to 2MHz • 20ns rise and fall times with 1nF output load • Trimmed timing capacitor discharge current for accurate
ISL8842AMBZ 8842 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8842AMUZ 42AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8843AABZ 8843 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
Ordering Information
PART NUMBER*
PART
TEMP. PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
ISL8840AABZ 8840 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
Features include 30V operation, low operating current, 90μA start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times.
VREF UV COMPARATOR
4.65V 4.80V
-+
PWM COMPARATOR
CS
+
100mV
-
FB COMP
+ -
ERROR AMPLIFIER
2R VF TOTAL = 1.15V R
1.1V CLAMP
ONLY ISL8841A/ ISL8844A/ ISL8845A
Q T
Q
VREF
ISL8840AAUZ 40AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8840AMBZ 8840 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8840AMUZ 40AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
deadtime/maximum duty cycle control • 1.5MHz bandwidth error amplifier • Tight tolerance voltage reference over line, load and
temperature • ±3% current limit threshold • Pb-free plus anneal available and ELV, WEEE, RoHS
元器件交易网
®
Data Sheet
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
April 18, 2007
FN6320.3
High Performance Industry Standard Single-Ended Current Mode PWM Controller
ISL8841AMUZ 41AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8842AABZ 8842 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8842AAUZ 42AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
Copyright © Intersil Americas Inc. 2005, 2006, 2007. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
元器件交易网
100k 150k RTCT
2.9V 1.0V
ON
OSCILLATOR COMPARATOR
<10ns
-
+
CLOCK
8.4mA
ON
SQ 36k
RQ
RESET DOMINANT
VREF OUT
元器件交易网 ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
ISL8845AABZ 8845 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8845AAUZ 45AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8845AMBZ 8845 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
元器件交易网 ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
Typical Application - 48V Input Dual Output Flyback
VIN+
36V TO 75V C1
R3
2
FN6320.3
April 18, 2007
FN6320.3 April 18, 2007
+-
3
Functional Block Diagram
VDD GND
START/STOP UV COMPARATOR
+
VDD OK
-
+-
2.5V
A A = 0.5
VREF 5.00V ENABLE
VREF FAULT +
ISL8841AABZ 8841 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)
ISL8841AAUZ 41AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8841AMBZ 8841 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8844AAUZ 44AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
ISL8844AMBZ 8844 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8844AMUZ 44AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
PART NUMBER ISL8840A ISL8841A ISL8842A ISL8843A ISL8844A ISL8845A
RISING UVLO 7.0 7.0
14.4V 8.4V 14.4V 8.4V
MAX. DUTY CYCLE 100% 50% 100% 100% 50% 50%
Pinout
ISL8843AAUZ 43AAZ (See Note)
-40 to +105 8 Ld MSOP M8.118
Ordering Information (Continued)
PART NUMBER*
PART
TEMP. PACKAGE PKG.
MARKING RANGE (°C) (Pb-free) DWG. #
C4
C2 R1
CR6
C3 Q1
CR5
T1
C21 + C15 R21
C5
CR2
CR4 + C22
+
C17
C19
C20
R16
R17
C6
U2
R1C16
+1.8V
RETURN R18
4
VIN-
R6 Q3
VR1
R4 CR1
R22 R27
U4
R26 COMP VREF
CS
V DD
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.
ISL8845AMUZ 45AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
*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.
ISL8843AMBZ 8843 AMBZ -55 to +125 8 Ld SOIC M8.15 (See Note)
ISL8843AMUZ 43AMZ (See Note)
-55 to +125 8 Ld MSOP M8.118
ISL8844AABZ 8844 AABZ -40 to +105 8 Ld SOIC M8.15 (See Note)