MAX5043ETN Maxim Integrated Products, MAX5043ETN Datasheet

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MAX5043ETN

Manufacturer Part Number
MAX5043ETN
Description
Switching Converters, Regulators & Controllers Two-Switch Power IC w/Power MOSFET
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX5042/MAX5043 isolated multimode PWM power
ICs feature integrated switching power MOSFETs con-
nected in a voltage-clamped, two-transistor, power-circuit
configuration. These devices operate from a wide 20V to
76V input voltage range. The MAX5042 includes a hot-
swap controller for use with an external power MOSFET to
limit inrush current for applications where the power sup-
ply is plugged into a live power backplane. The MAX5043
does not include a hot-swap controller.
The voltage-clamped power topology of the MAX5042/
MAX5043 enables full recovery of stored magnetizing
and leakage inductive energy for enhanced efficiency
and reliability. Operating at up to 500kHz switching fre-
quency, these devices provide up to 50W of output
power. The MAX5042/MAX5043 allow the implementa-
tion of both forward and flyback voltage or current-mode
converter topologies. A dedicated latched external shut-
down provides protection in addition to internal thermal
shutdown.
The MAX5042/MAX5043 achieve higher efficiency when
used with secondary-side synchronous rectification.
These devices generate a look-ahead signal for driving
secondary-side synchronous rectifiers.
The MAX5042/MAX5043 are rated for operation over the
-40°C to +125°C and -40°C to +85°C temperature
range, respectively, and are available in a small surface-
mount 56-pin thin QFN package.
Warning: The MAX5042/MAX5043 are designed to
work with high voltages. Exercise caution.
19-3046; Rev 3a; 9/04
Pin Configurations 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.
High-Efficiency Telecom/Datacom Power
Supplies
Router/Switch Cards with 48V Backplane Power
Systems
Servers with 48V Backplane Power Systems
xDSL Line Cards
xDSL Line-Driver Power Supplies
Distributed Power Systems with 48V Bus
42V Automotive Power Supplies
Power-Supply Modules
Power MOSFETs and Hot-Swap Controller
________________________________________________________________ Maxim Integrated Products
General Description
Two-Switch Power ICs with Integrated
Applications
♦ Reliable Single-Stage Clamped Two-Switch Power
♦ No Reset Winding Required
♦ Up to 50W Output Power
♦ Integrated High-Voltage 75mΩ Power MOSFETs
♦ 20V to 76V Wide Input Voltage Range
♦ Feed-Forward Voltage or Current-Mode Control
♦ Programmable Brownout Undervoltage Lockout
♦ Integrated Current Signal Amplifier for High-
♦ Internal Overtemperature Shutdown
♦ Indefinite Short-Circuit Protection
♦ Integrated Thermally Protected High-Voltage
♦ Integrated Hot-Swap Controller (MAX5042)
♦ Integrated Look-Ahead Signal Output Drives
♦ >90% Efficiency with Synchronous Rectification
♦ Up to 500kHz Switching Frequency
♦ High-Power, Small-Footprint 56-Pin Thermally
MAX5042ATN
MAX5043ETN
MAX5042
MAX5043
ICs for High Efficiency
Efficiency, Current-Mode Control
Startup Linear Regulator
High-Speed Optocoupler for Secondary-Side
Synchronous Rectification
Enhanced QFN Package
PART
PART
Two-Switch Power IC with Integrated Power
MOSFETs and Hot-Swap Controller for Isolated
Power Supplies
Two-Switch Power IC with Integrated Power
MOSFETs for Isolated Power Supplies
-40°C to +125°C
-40°C to +85°C
TEMP RANGE
Ordering Information
DESCRIPTION
Selector Guide
PIN-PACKAGE
56 Thin QFN
56 Thin QFN
Features
1

Related parts for MAX5043ETN

MAX5043ETN Summary of contents

Page 1

... High-Speed Optocoupler for Secondary-Side Synchronous Rectification ♦ >90% Efficiency with Synchronous Rectification ♦ 500kHz Switching Frequency ♦ High-Power, Small-Footprint 56-Pin Thermally Enhanced QFN Package Applications PART MAX5042ATN MAX5043ETN PART MAX5042 MAX5043 Features Ordering Information TEMP RANGE PIN-PACKAGE -40°C to +125°C 56 Thin QFN -40° ...

Page 2

... Thin QFN (derate 47.6mW/°C above +70°C) .......3.8W Junction to Ambient Thermal Resistance, θ Operating Temperature Range MAX5042ATN ................................................-40°C to +125°C MAX5043ETN ..................................................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C ...

Page 3

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller ELECTRICAL CHARACTERISTICS (V = 20V to 76V 18V, C POSINPWM REG15 0.22µ 10kΩ 0.22µF, V DRVDEL DRVDEL otherwise noted. Typical values are at V ...

Page 4

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller ELECTRICAL CHARACTERISTICS (continued 20V to 76V 18V, C POSINPWM REG15 0.22µ 10kΩ 0.22µF, V DRVDEL DRVDEL otherwise noted. Typical values are at ...

Page 5

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller ELECTRICAL CHARACTERISTICS (continued 20V to 76V 18V, C POSINPWM REG15 0.22µ 10kΩ 0.22µF, V DRVDEL DRVDEL otherwise noted. Typical values are at ...

Page 6

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller ELECTRICAL CHARACTERISTICS (continued 20V to 76V 18V, C POSINPWM REG15 0.22µ 10kΩ 0.22µF, V DRVDEL DRVDEL otherwise noted. Typical values are at ...

Page 7

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller (V = 20V +25°C, unless otherwise noted.) POSINPWM A HOT-SWAP UNDERVOLTAGE LOCKOUT THRESHOLD vs. TEMPERATURE RISING POSINHS FALLING POSINHS 27 26 ...

Page 8

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller (V = 20V +25°C, unless otherwise noted.) POSINPWM A MAXIMUM DUTY CYCLE vs. TEMPERATURE MEASURED AT XFRMRL 46 -50 - ...

Page 9

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller (V = 20V +25°C, unless otherwise noted.) POSINPWM A CURRENT-LIMIT THRESHOLD vs. TEMPERATURE 160 158 156 154 152 150 -50 - 100 TEMPERATURE (°C) ...

Page 10

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller PIN NAME MAX5042 MAX5043 1, 2, 14, 15 14, 15, N.C. 40, 42–45, 56 40, 42–45 RCFF 4 4 RAMP 5 5 OPTO 6 6 ...

Page 11

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller PIN NAME MAX5042 MAX5043 HSOK 26 — 27 — HSEN 28, 29 — NEGIN 30 — HSGATE 31 — HSDRAIN 32 32 CSOUT 33 33 CSP 34 34 CSN 26, ...

Page 12

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller PIN NAME MAX5042 MAX5043 47 25, 47 POSINPWM 48, 51, 54, 55 48, 51, 54, 55 DRNH 49, 50, 52, 53 49, 50, 52, 53 XFRMRH — 27 DEN — ...

Page 13

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller +V POSINPWM MAX5043 BULK STORAGE CAPACITOR PWM CIRCUIT WITH INTEGRATED FETs QL PWMNEG Figure 2. Simplified Diagram of a MAX5043-Based Isolated Power Supply Set the switching ...

Page 14

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller MAX5042 41 REG15 39 REG5 REG5 (5V) REG5 OK REG15 OK 38 REG9 3 RCFF 5V IFLT 80µA Q OVRLD 11 FLTINT 2.3V/1.6V 4 RAMP CPWM 5 OPTO 5V 32µA ...

Page 15

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller MAX5043 41 REG15 39 REG5 REG5 (5V) REG5 OK 38 REG9 3 RCFF 5V IFLT 80µA OVRLD 11 FLTINT 2.3V/1.6V 4 RAMP CPWM 5 OPTO 5V 32µA 6 CSS 7.5V ...

Page 16

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller where R is the external high-side resistor external low-side resistor the internal high-side Hi resistor (1.2MΩ, typ the internal low-side resistor Le (50kΩ, typ), ...

Page 17

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller Maximize the signal-to-noise ratio by setting the ramp peak as high as possible. Calculate the low-frequency, small-signal gain of the power stage (the gain from the inverting input of the ...

Page 18

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller I FLTINT ≅ C FLTINT where I = 80µA, FLTINT t is the desired ignore time during which current-limit sh events from the current-limit comparator are ignored. ...

Page 19

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller Determining Hot-Swap Inrush Current Calculate the hot-swap inrush current using the follow- ing formula: dV HSDRAIN = where the load capacitance, IN ...

Page 20

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller V IN+ 32V TO 72V C1 R12 220µF 200kΩ 100V 1% R22 10kΩ R13 0.68µF C13 1MΩ C25 0.22µF 100V 1µF R14 R20 C9 C12 10kΩ 10kΩ 220pF 0.1µF PWMNEG ...

Page 21

Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller TOP VIEW N.C. 1 N.C. 2 RCFF 3 RAMP 4 OPTO 5 CSS 6 BST 7 MAX5042ATN DRVIN 8 PWMPNEG ...

Page 22

... 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. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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