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參數資料
| 型號： | MAX5019-MAX5020 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Current-Mode PWM Controllers with Integrated Startup Circuit |
| 中文描述： | 電流模式PWM集成啟動電路控制器 |
| 文件頁數： | 1/14頁 |
| 文件大小： | 328K |
| 代理商： | MAX5019-MAX5020 |
General Description
The MAX5019/MAX5020 integrate all the building
blocks necessary for implementing DC-DC fixed-fre-
quency power supplies. Either primary- or secondary-
side regulation may be used to implement isolated or
nonisolated power supplies. These devices are current-
mode controllers with an integrated high-voltage start-
up circuit suitable for telecom/industrial voltage range
power supplies. Current-mode control with leading-
edge blanking simplifies control-loop design and inter-
nal ramp compensation circuitry stabilizes the current
loop when operating at duty cycles above 50%
(MAX5019). The MAX5019 allows 85% operating duty
cycle and can be used to implement flyback converters
whereas the MAX5020 limits the operating duty cycle to
less than 50% and can be used in single-ended for-
ward converters. A high-voltage startup circuit allows
these devices to draw power directly from the 18V to
110V input supply during startup. The switching fre-
quency is internally trimmed to 275kHz ±10%, thus
reducing magnetics and filter component costs.
The MAX5019/MAX5020 are available in 8-pin SO
packages.
Warning:
The MAX5019/MAX5020 operate with high
voltages. Exercise caution.
Applications
Telecom Power Supplies
Industrial Power Supplies
Networking Power Supplies
Isolated Power Supplies
Features
o
Wide Input Range: (18V to 110V) or (13V to 36V)
o
Isolated (without optocoupler) or Nonisolated
Power Supply
o
Current-Mode Control
o
Leading-Edge Blanking
o
Internally Trimmed 275kHz ±10% Oscillator
o
Low External Component Count
o
Soft-Start
o
High-Voltage Startup Circuit
o
Pulse-by-Pulse Current Limiting
o
Thermal Shutdown
o
SO-8 Package
M
Current-Mode PWM Controllers with Integrated
Startup Circuit
________________________________________________________________
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
CS
1
2
8
7
V
CC
NDRV
V
DD
FB
V+
8-SO
TOP VIEW
3
4
6
5
MAX5019/
MAX5020
SS_SHDN
Pin Configuration
Ordering Information
NDRV
V
IN
V
OUT
V
DD
V
CC
CS
FB
MAX5020
V+
SS_SHDN
GND
Typical Operating Circuit
19-2115; Rev 0; 7/01
PART
TEMP. RANGE
0
°
C to +70
°
C
-40
°
C to +85
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
8-SO
8-SO
8-SO
8-SO
MAX5019
CSA*
MAX5019ESA*
MAX5020
CSA*
MAX5020ESA*
*See Selector Guide at end of data sheet.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX5019 | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| MAX5020CSA | Analog IC |
| MAX5020ESA | Analog IC |
| MAX5019ESA | Analog IC |
| MAX501AMRG | Voltage-Output, 12-Bit Multiplying DACs |
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