MAX5021EUT+T Maxim Integrated Products, MAX5021EUT+T Datasheet

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MAX5021EUT+T

Manufacturer Part Number
MAX5021EUT+T
Description
IC CNTRLR PWM CRNT MD SOT23-6
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5021EUT+T

Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
290kHz
Duty Cycle
51%
Voltage - Supply
11 V ~ 28 V
Buck
No
Boost
No
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 85°C
Package / Case
SOT-23-6
Frequency-max
290kHz
Duty Cycle (max)
50 %
Output Current
250 mA
Mounting Style
SMD/SMT
Switching Frequency
262 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
Other names
MAX5021EUT+T
MAX5021EUT+TTR
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.
19-2066; Rev 1; 9/01
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.
V
SUPPLY
Universal Off-Line Power Supplies
Standby Power Supplies
Isolated Power Supplies
Isolated Telecom Power Supplies
Mobile Phone Chargers
V
OPTO
CC
Current-Mode PWM Controllers for Isolated
MAX5021
MAX5022
GND
V
Typical Operating Circuit
IN
________________________________________________________________ Maxim Integrated Products
NDRV
CS
General Description
Applications
V
OUT
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
WARNING: The MAX5021/MAX5022 are designed to work
with high voltages. Exercise caution!
MAX5021EUT
MAX5021EUA
MAX5022EUT
MAX5022EUA
MAX5021EPA
MAX5022EPA
TOP VIEW
Time
NDRV
GND
PART
CS
1
2
3
MAX5021
MAX5022
SOT23
CYCLE
DUTY
MAX
50%
50%
50%
75%
75%
75%
Power Supplies
6
5
4
Ordering Information
-40 C to +85 C 6 SOT23-6 AASQ
-40 C to +85 C 8 MAX
-40 C to +85 C 8 PDIP
-40 C to +85 C 6 SOT23-6 AASR
-40 C to +85 C 8 MAX
-40 C to +85 C 8 PDIP
OPTO
V
V
IN
CC
RANGE
TEMP.
Pin Configuration
OPTO
N.C.
V
V
CC
IN
1
2
4
3
PDIP/ MAX
PIN-
PACKAGE
MAX5021
MAX5022
Features
6
MARK
8
7
5
TOP
CS
GND
NDRV
N.C.
1

Related parts for MAX5021EUT+T

MAX5021EUT+T Summary of contents

Page 1

... MAX5021 MAX5022 OPTO NDRV CS GND ________________________________________________________________ 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 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 ± ...

Page 2

Current-Mode PWM Controllers for Isolated Power Supplies ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +30V GND ............................................................-0.3V to +13V CC NDRV to GND.............................................-0. CS, OPTO to GND ....................................................-0.3V to +6V NDRV Short-Circuit to GND........................................Continuous ...

Page 3

Current-Mode PWM Controllers for Isolated ELECTRICAL CHARACTERISTICS (continued +11V to +28V OPTO is unconnected, 10nF bypass capacitors +85°C, unless otherwise noted. Typical values are at V PARAMETER SYMBOL OSCILLATOR Switching Frequency ...

Page 4

Current-Mode PWM Controllers for Isolated Power Supplies (V = 15V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 1. 28. OPTO CS 1.55 1.50 1.45 1.40 -40 -20 ...

Page 5

Current-Mode PWM Controllers for Isolated PIN NAME PDIP SOT23 MAX GND 3 6 NDRV OPTO — N.C. Detailed Description The MAX5021/MAX5022 are current-mode ...

Page 6

Current-Mode PWM Controllers for Isolated Power Supplies CENTRAL SEMICONDUCTOR CBR1-D100S AC L 85VAC TO 470 N 265VAC 1. 400V D1 250mA, 75V CENTRAL SEMICONDUCTOR CMPD914 C3 0.22 F OPTO FAIRCHILD CNY17-3 R9 240k Figure ...

Page 7

Current-Mode PWM Controllers for Isolated 85VAC (corresponding to 120VDC) to the 24V wakeup level results in a resistor value of about assume R values between 750k S the high-line voltage of 265VAC (corresponding to 374VDC) power ...

Page 8

Current-Mode PWM Controllers for Isolated Power Supplies OPTO GND -36VDC TO -72VDC IN Figure 4. -48VDC Input to +5V Output WARNING! DANGEROUS AND LETHAL VOLTAGES ARE PRESENT IN OFF-LINE CIRCUITS! USE EXTREME CAUTION IN THE CONSTRUCTION, TESTING, ...

Page 9

Current-Mode PWM Controllers for Isolated V IN 6.2k OPTO CPWM 0.75V CS VO PWM V CS 0.6V ILIM _______________________________________________________________________________________ UVLO IN REFERENCE 24V 1.25V 10V GND OSCILLATOR 262kHz* *MAX5021: 50% MAXIMUM DUTY CYCLE MAX5022: 75% MAXIMUM DUTY ...

Page 10

Current-Mode PWM Controllers for Isolated Power Supplies 10 ______________________________________________________________________________________ Package Information PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. REV. 1 21-0036 J 1 ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2001 Maxim Integrated Products ...

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