MAX5015ESA+T Maxim Integrated Products, MAX5015ESA+T Datasheet

IC CNTRLR PWM CRNT MD 8-SOIC

MAX5015ESA+T

Manufacturer Part Number
MAX5015ESA+T
Description
IC CNTRLR PWM CRNT MD 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX5015ESA.pdf (14 pages)

Specifications of MAX5015ESA+T

Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
275kHz
Duty Cycle
50%
Voltage - Supply
18 V ~ 110 V
Buck
No
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (3.9mm Width)
Frequency-max
275kHz
Duty Cycle (max)
50 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
275 KHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Synchronous Pin
No
Topology
Flyback, Forward
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
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.
Current-Mode PWM Controllers with Integrated
TOP VIEW
Telecom Power Supplies
Industrial Power Supplies
Networking Power Supplies
Isolated Power Supplies
Startup Circuit for Isolated Power Supplies
SS_SHDN
OPTO
V
V+
DD
________________________________________________________________ Maxim Integrated Products
1
2
4
3
General Description
MAX5014/
MAX5015
8-SO
Pin Configuration
Applications
8
7
6
5
V
NDRV
GND
CS
CC
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
*See Selector Guide at end of data sheet.
MAX5014CSA*
MAX5014ESA*
MAX5015CSA*
MAX5015ESA*
V
IN
PART
V
SS_SHDN
DD
MAX5015
Typical Operating Circuit
V+
NDRV
OPTO
GND
V
-40°C to +85°C
-40°C to +85°C
CS
CC
TEMP. RANGE
Ordering Information
0°C to +70°C
0°C to +70°C
OPTOCOUPLER
PIN-PACKAGE
Features
8-SO
8-SO
8-SO
8-SO
V
OUT
1

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MAX5015ESA+T Summary of contents

Page 1

... MAX5014/ MAX5015 OPTO 3 SS_SHDN 4 8-SO ________________________________________________________________ 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. 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 ...

Page 2

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ABSOLUTE MAXIMUM RATINGS V+ to GND ……………………………………...……-0.3V to +120V V to GND.………………………………….……….-0.3V to +40V GND.………………….……………………-0.3V to +12.5V CC OPTO, NDRV, SS_SHDN GND .……-0.3V to ...

Page 3

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ELECTRICAL CHARACTERISTICS (continued 13V, a 10µF capacitor connects V DD cuit, OPTO = GND -40°C to +85°C, unless otherwise noted. Typical values are at T ...

Page 4

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies (V+ = 48V 13V, NRDV is open circuit MAX5015 MAXIMUM DUTY CYCLE vs. TEMPERATURE 48 GND OPTO 47.6 47.4 ...

Page 5

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies (V+ = 48V 13V, NRDV is open circuit NDRV FREQUENCY vs 271.0 270.5 270.0 269.5 269.0 268 4V GND ...

Page 6

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies PIN NAME High-Voltage Startup Input. Connect directly to an input voltage between 18V to 110V. Connects 1 V+ internally to a high-voltage linear regulator that generates ...

Page 7

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies HIGH- VOLTAGE GND REGULATOR EN OUT MAX5014 ONLY SLOPE COMPENSATION 26mV/µs 26mV/µs ∑ PWM OPTO SS_SHDN 2.4V 0.4V Figure 1. Functional Diagram _______________________________________________________________________________________ IN BIAS ...

Page 8

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies 1N4148 (36V TO 72V 47µF MAX5015 SS_SHDN C SS 0.1µF Figure 2. Forward Converter Optocoupled Feedback Isolated voltage feedback is ...

Page 9

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies MAX5014 SS_SHDN C SS Figure 3. Flyback Converter To reduce power dissipation the high-voltage regulator is disabled when the V voltage reaches 12.7V. ...

Page 10

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ms = × startup nF where C is the soft-start capacitor as shown in Figure 2. SS Operation begins when V SS_SHDN When soft-start ...

Page 11

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies V R REF OUT 1 where V is the reference voltage of the shunt REF regulator, and R and R are the resistors ...

Page 12

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ing equation to calculate the tertiary winding turns ratio DDMIN × ≤ IN_MIN + DDMAX × N ...

Page 13

Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies Table 1. Component Manufacturers Power FETS Current-Sense Resistors Diodes Capacitors Magnetics Selector Guide MAXIMUM PART DUTY CYCLE MAX5014CSA 85% MAX5014ESA 85% MAX5015CSA 50% MAX5015ESA 50% ______________________________________________________________________________________ International Rectifier Fairchild ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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