MAX5053BEUA+ Maxim Integrated Products, MAX5053BEUA+ Datasheet

IC CNTRLR PWM CRNT MD 8-UMAX

MAX5053BEUA+

Manufacturer Part Number
MAX5053BEUA+
Description
IC CNTRLR PWM CRNT MD 8-UMAX
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX5053BEUA.pdf (13 pages)

Specifications of MAX5053BEUA+

Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
290kHz
Duty Cycle
76%
Voltage - Supply
10.8 V ~ 24 V
Buck
No
Boost
Yes
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 85°C
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Frequency-max
290kHz
Duty Cycle (max)
75 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
262 KHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Synchronous Pin
No
Topology
Boost, Flyback
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX5052/MAX5053 current-mode PWM controllers
contain all the control circuitry required for the design of
wide-input-voltage isolated and nonisolated power
supplies. The MAX5052 is well suited for universal input
(rectified 85VAC to 265VAC) or telecom (-36VDC to
-72VDC) power supplies. The MAX5053 is well suited for
low-input-voltage (10.8VDC to 24VDC) power supplies.
The MAX5052/MAX5053 contain an internal error ampli-
fier that regulates the tertiary winding output voltage.
This implements a primary-side regulated, isolated
power supply, eliminating the need for an optocoupler.
An input undervoltage lockout (UVLO) is provided for
programming the input-supply start voltage and to
ensure proper operation during brownout conditions.
The input-supply start voltage is externally programma-
ble with a voltage-divider. To shutdown the device, the
UVLO pin is pulled low. Internal digital soft-start
reduces output voltage overshoot. The internal thermal
shutdown circuit protects the device in the event the
junction temperature exceeds +130°C.
The MAX5052 has an internal bootstrap UVLO with
large hysteresis that requires a minimum voltage of
23.6V for startup. The MAX5053 does not have the
internal bootstrap UVLO and can be biased directly
from a minimum voltage of 10.8V.
The 262kHz switching frequency is internally trimmed to
±12% accuracy; this allows the optimization of the
magnetic and filter components resulting in compact,
cost-effective power supplies. The MAX5052A/
MAX5053A are offered with a 50% maximum duty-cycle
limit. The MAX5052B/MAX5053B are offered with a 75%
maximum duty-cycle limit. These devices are available
in 8-pin µMAX packages and operate over the -40°C to
+85°C temperature range.
19-2590; Rev 1; 11/03
Functional Diagram/Typical Operating Circuit/Selector
Guide appear at end of data sheet.
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.
Universal Input AC
Power Supplies
Isolated Telecom Power
Supplies
Networking Systems
Computer Systems/
Servers
Amplifier for Isolated/Nonisolated Power Supplies
Current-Mode PWM Controllers with an Error
________________________________________________________________ Maxim Integrated Products
General Description
Industrial Power
Conversion
Isolated Keep-Alive
Circuits
12V Boost Regulators
12V SEPIC Regulators
Applications
Warning: The MAX5052/MAX5053 are designed to work with
high voltages. Exercise caution.
MAX5052AEUA
MAX5052BEUA
MAX5053AEUA
MAX5053BEUA
Available in a Tiny 8-Pin µMAX Package
Current-Mode Control
50W Output Power
Universal Offline Input Voltage Range
V
(MAX5053)
Digital Soft-Start
Programmable Input Startup Voltage
Internal Bootstrap UVLO with Large Hysteresis
(MAX5052)
Internal Error Amplifier with 1% Accurate
Reference
Thermal Shutdown
45µA (typ) Startup Supply Current
1.4mA (typ) Operating Supply Current
Fixed Switching Frequency of 262kHz ±12%
50% Maximum Duty-Cycle Limit
(MAX5052A/MAX5053A)
75% Maximum Duty-Cycle Limit
(MAX5052B/MAX5053B)
60ns Cycle-by-Cycle Current-Limit Response Time
IN
Rectified 85VAC to 265VAC (MAX5052)
PART
Directly Driven from 10.8V to 24V Input
TOP VIEW
UVLO/EN
COMP
CS
FB
1
2
4
3
Ordering Information
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
MAX5052
MAX5053
µMAX
Pin Configuration
6
8
7
5
V
NDRV
V
GND
IN
CC
PIN-PACKAGE
8 µMAX
8 µMAX
8 µMAX
8 µMAX
Features
1

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MAX5053BEUA+ Summary of contents

Page 1

... SEPIC Regulators Servers Functional Diagram/Typical Operating Circuit/Selector Guide appear at end of data sheet. ________________________________________________________________ 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. Available in a Tiny 8-Pin µMAX Package Current-Mode Control ...

Page 2

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +30V GND ............................................................-0.3V to +13V CC FB, COMP, UVLO GND .................................-0.3V to +6V NDRV to GND.............................................-0.3V ...

Page 3

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies ELECTRICAL CHARACTERISTICS (continued +12V (for MAX5052, V must first be brought up to 23.6V for startup), 10nF bypass capacitors +1.4V, V ...

Page 4

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies (UVLO = +1.4V +1V floating COMP BOOTSTRAP UVLO WAKE-UP LEVEL vs. TEMPERATURE 21.60 MAX5052 V RISING IN 21.55 21.50 21.45 21.40 21.35 21.30 ...

Page 5

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies (UVLO = +1.4V +1V floating COMP CURRENT-LIMIT TRIP THRESHOLD 30 TOTAL NUMBER OF DEVICES = 200 260 ...

Page 6

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies (UVLO = +1.4V +1V floating COMP NDRV OUTPUT IMPEDANCE vs. TEMPERATURE 5 24V IN 4.8 SOURCING 20mA 4.6 4.4 4.2 4.0 ...

Page 7

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies D1 V SUPPLY NDRV MAX5052 GND COMP FB UVLO/ Figure 1. Nonisolated Power Supply with Programmable Input- ...

Page 8

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies 0V 100ms/div Figure 2. V and V During Startup when Using the IN CC MAX5052 in Bootstrapped Mode (Figure drops below 9.9V before startup is complete, ...

Page 9

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies + OPTO TRANS Figure 3. Secondary-Side Regulated, Isolated Power Supply smaller. However, in this mode, the input voltage range has to ...

Page 10

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies IN FB_P D8 C16 R6 C12 15µF 33kΩ 0.22µF 35V +V IN +VIN C1 C2 1µF 1µF 100V 100V FB_P R1 22.6kΩ 2200pF ...

Page 11

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies The current-sense resistor (R ), connected between CS the source of the MOSFET and ground, sets the current limit. The CS input has a voltage-trip level (V 291mV. Use ...

Page 12

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies CLAMP 26.1V DIGITAL SOFT-START UVLO COMP FB ERROR AMP CPWM CS 1.4V VO PWM V CS 0.3V ILIM Typical Operating Circuit SUPPLY ...

Page 13

... 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 ____________________ 13 © 2003 Maxim Integrated Products ...

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