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MAX5014 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX5014
Description  Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX5014 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX5014/MAX5015 integrate all the building
blocks necessary for implementing DC-DC fixed-fre-
quency isolated power supplies. These devices are
current-mode controllers with an integrated high-volt-
age startup circuit suitable for isolated telecom/industri-
al voltage range power supplies. Current-mode control
with leading-edge blanking simplifies control-loop
design and internal ramp compensation circuitry stabi-
lizes the current loop when operating at duty cycles
above 50% (MAX5014). The MAX5014 allows 85%
operating duty cycle and could be used to implement
flyback converters, whereas the MAX5015 limits the
operating duty cycle to less than 50% and can be used
in single-ended forward converters. A high-voltage
startup circuit allows these devices to draw power
directly from the 18V to 110V input supply during start-
up. The switching frequency is internally trimmed to
275kHz ±10%, thus reducing magnetics and filter com-
ponent costs.
The MAX5014/MAX5015 are available in 8-pin SO
packages. An evaluation kit (MAX5015EVKIT) is also
available.
Warning: The MAX5014/MAX5015 are designed to
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 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
Current-Mode PWM Controllers with Integrated
Startup Circuit for Isolated Power Supplies
________________________________________________________________ Maxim Integrated Products
1
GND
CS
1
2
8
7
VCC
NDRV
VDD
OPTO
V+
8-SO
TOP VIEW
3
4
6
5
MAX5014/
MAX5015
SS_SHDN
Pin Configuration
Ordering Information
MAX5015
VDD
V+
SS_SHDN
NDRV
CS
GND
VCC
OPTO
VIN
VOUT
OPTOCOUPLER
Typical Operating Circuit
19-2082; Rev 0; 7/01
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.
EVALUATION
KIT
AVAILABLE
PART
TEMP. RANGE
PIN-PACKAGE
MAX5014CSA*
0
°C to +70°C8-SO
MAX5014ESA*
-40
°C to +85°C8-SO
MAX5015CSA*
0
°C to +70°C8-SO
MAX5015ESA*
-40
°C to +85°C8-SO
*See Selector Guide at end of data sheet.


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