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參數資料
| 型號： | MAX5021 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Current-Mode PWM Controllers for Isolated Power Supplies |
| 中文描述： | 電流模式PWM控制器，用于隔離型電源 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 240K |
| 代理商： | MAX5021 |
General Description
The MAX5021/MAX5022 current-mode PWM controllers
contain all the control circuitry required for the design
of wide input voltage range isolated power supplies.
These devices are well suited for use in universal input
(85VAC to 265VAC) off-line or telecom (-36VDC to
-72VDC) power supplies.
An undervoltage lockout (UVLO) circuit with large hys-
teresis coupled with low startup and operating current
reduce power dissipation in the startup resistor and
allow use of ceramic bypass capacitors. The 262kHz
switching frequency is internally trimmed to ±12%
accuracy; this allows the optimization of the magnetic
and filter components resulting in compact, cost-effec-
tive power supplies. The MAX5021 with 50% maximum
duty cycle and MAX5022 with 75% maximum duty
cycle are recommended for forward converters and fly-
back converters, respectively. The MAX5021/MAX5022
are available in 6-pin SOT23, 8-pin μMAX, and 8-pin
DIP packages and are rated for operation over the
-40°C to +85°C temperature range.
Applications
Universal Off-Line Power Supplies
Standby Power Supplies
Isolated Power Supplies
Isolated Telecom Power Supplies
Mobile Phone Chargers
Features
o
Available in a Tiny 6-Pin SOT23 Package
o
50μA Typical Startup Current
o
1.2mA Typical Operating Current
o
Large UVLO Hysteresis of 14V
o
Fixed Switching Frequency of 262kHz ±12%
o
50% Maximum Duty Cycle Limit (MAX5021)
o
75% Maximum Duty Cycle Limit (MAX5022)
o
60ns Cycle-by-Cycle Current-Limit Response
Time
M
Current-Mode PWM Controllers for Isolated
Power Supplies
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
GND
V
CC
NDRV
1
6
OPTO
5
V
IN
CS
MAX5021
MAX5022
SOT23
TOP VIEW
2
3
4
NDRV
N.C.
N.C.
1
2
8
7
CS
GND
V
IN
V
CC
OPTO
PDIP/
μ
MAX
3
4
6
5
MAX5021
MAX5022
Pin Configuration
Ordering Information
MAX5021
MAX5022
V
OUT
V
SUPPLY
OPTO
NDRV
CS
V
CC
V
IN
GND
Typical Operating Circuit
19-2066; Rev 1; 9/01
PART
MAX
DUTY
CYCLE
TEMP.
RANGE
PIN-
PACKAGE
TOP
MARK
MAX5021
EUT
MAX5021EUA
MAX5021EPA
MAX5022
EUT
MAX5022EUA
MAX5022EPA
50%
50%
50%
75%
75%
75%
-40
°
C to +85
°
C 6 SOT23-6
-40
°
C to +85
°
C 8
μ
MAX
-40
°
C to +85
°
C 8 PDIP
-40
°
C to +85
°
C 6 SOT23-6
-40
°
C to +85
°
C 8
μ
MAX
-40
°
C to +85
°
C 8 PDIP
AASQ
—
—
AASR
—
—
WARNING: The MAX5021/MAX5022 are designed to work
with high voltages. Exercise caution!
相關PDF資料 |
PDF描述 |
|---|---|
| MAX5021EPA | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5021EUT | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022 | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EPA | Current-Mode PWM Controllers for Isolated Power Supplies |
| MAX5022EUA | Current-Mode PWM Controllers for Isolated Power Supplies |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5021EPA | 功能描述:電流型 PWM 控制器 for Isolated Power Supplies RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5021EPA+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5021ESA+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5021ETT+T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX5021EUA | 功能描述:電流型 PWM 控制器 for Isolated Power Supplies RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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