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ISL6840, ISL6841, ISL6842, ISL6843, ISL6845
数据资料
December 2008
FN9124.4
改善的业界标准单端电流模式
PWM
控制器
可调频率、½电源、电流模式
PWM
控制器的系列:
ISL6840, ISL6841, ISL6842、ISL6843、ISL6844
和
ISL6845
是设计用于大范围½量变换应用,包括升压、反馈
和隔离输出的结构。峰值电流模式控制可有效地处理½量瞬
变且有固有的过流保护。
这个先进的
BiCMOS
设计不½兼容了业界标准
384x
控制器
系列的引脚,而且显著地改善了其性½。其特点包括½运½
电流、60μA 启动电流、可调工½频率高达
2MHz
和
20ns
升
降时间的高峰值电流驱动力。
零件号码
ISL6840
ISL6841
ISL6842
ISL6843
ISL6844
ISL6845
主要特点
•
•
•
•
•
•
•
•
•
1A MOSFET
驱动器
60μA
启动电流, 其峰值为
100μA
控制到输出的延迟是
30ns
高峰值电流模式控制固有的快速瞬变反应
可调开关频率高达
2MHz
20ns
升降时间以
1nF
输出负½½
平衡的定时电容的放电电流适合于精确死区时间/最
大占空比控制
高带½误差放大器
遍及输入、负½½和温度范围的精密的容差电压基准
精密的容差电流门限值
不含
Pb
的包装
•
上升欠压切断
7.0V
7.0V
14.4V
8.4V
14.4V
8.4V
最大占空比
100%
50%
100%
100%
50%
50%
•
应用
•
•
•
•
•
•
•
电信和信息电源
无线基站电源
档案服务器电源
工业动力系统
个人计算机电源
隔离降压和反馈变换器
升压调节器
插脚引线
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
(8-PIN SOIC, MSOP)
顶视图
COMP 1
FB 2
CS
3
8 VREF
7 VDD
6 OUT
5 GND
RTCT 4
(8-PIN DFN)
顶视图
COMP
FB
CS
RTCT
VREF
VDD
OUT
GND
1
2
3
4
8
7
6
5
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
定购资料
零件号码
ISL6840IB
ISL6840IBZ
(See Note)
ISL6840IU
ISL6840IUZ
(See Note)
ISL6841IB
ISL6841IBZ
(See Note)
ISL6841IU
ISL6841IUZ
(See Note)
ISL6842IB
ISL6842IBZ
(See Note)
ISL6842IU
ISL6842IUZ
(See Note)
ISL6843IB
ISL6843IBZ
(See Note)
ISL6843IU
ISL6843IUZ
(See Note)
ISL6844IB
ISL6844IBZ
(See Note)
ISL6844IU
ISL6844IUZ
(See Note)
ISL6845IB
ISL6845IBZ
(See Note)
ISL6845IU
ISL6845IUZ
(See Note)
ISL6840IRZ-T*
(See Note)
ISL6841IRZ-T*
(See Note)
ISL6842IRZ-T
(See Note)
ISL6843IRZ-T
(See Note)
零件号码
温度范围
(°C)
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
-40 to 105
包装
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld MSOP
8 Ld MSOP
(Pb-free)
8 Ld 2x3
DFN
(Pb-free)
8 Ld 2x3
DFN
(Pb-free)
8 Ld 2x3
DFN
(Pb-free)
8 Ld 2x3
DFN
(Pb-free)
包装图号 #
M8.15
M8.15
M8.118
M8.118
M8.15
M8.15
M8.118
M8.118
M8.15
M8.15
M8.118
M8.118
M8.15
M8.15
M8.118
M8.118
M8.15
M8.15
M8.118
M8.118
M8.15
M8.15
M8.118
M8.118
L8.2x3
L8.2x3
L8.2x3
L8.2x3
温度范围
(°C)
-40 to 105
包装
包装图号 #
8 Ld 2x3
DFN
(Pb-free)
8 Ld 2x3
ISL6845IRZ-T
-40 to 105
DFN
(See Note)
(Pb-free)
Add -T to part number for Tape and Reel packaging
ISL6844IRZ-T*
(See Note)
*Contact Factory for Availability
L8.2x3
L8.2x3
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
.
2
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
V
DD
UVLO
COMPARATOR
+
-
BG +
-
GND
A
2.5 V
A=0.5
V
DD
OK
ENABLE
V
REF
5.00 V
VREF
VREF FAULT
-
+
VREF
UV COMPARATOR
4.65V
↓
4.80V
↑
PWM
COMPARATOR
CS
+
-
+
-
100mV
ERROR
AMPLIFIER
+
-
2R
1.1V
CLAMP
R
ISL6841/4/5 ONLY
Q
T
Q
FB
COMP
OUT
VREF
2.6V
0.7V
ON
OSCILLATOR
COMPARATOR
-
RTCT
8.4mA
ON
+
CLOCK
P/N
-40, -41
-42, -44
-43, -45
UVLO ON/OFF
7.0 / 6.6V
14.3 / 8.8V
8.4 / 7.2V
S
Q
R
Q
RESET
DOMINANT
内部电路结构
3
+
-
BG
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
CR5
+3.3V
VIN+
R3
C4
CR4
C17
C19
+
C22
+
C20
R ETUR N
R1
36-75V
C1
C6
C3
Q1
CR6
R16
U2
R17
R 19
C14
R18
T1
R21
C21
+ C15
+ C16
+1.8V
C2
C5
C R2
R4
VIN-
R22
R27
U3
C13
R 15
R20
U4
R26
COMP VREF
CS
FB
V DD
OUT
RTCT
GND
ISL684x
R6
CR1
Q3
C12
VR1
C8
R13
C11
R10
典型应用:
48V
输入双输出
反馈
½换器
4