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MAX5074
Power IC with Integrated MOSFETs for Isolated IEEE 802.3af PD and Telecom Power-Supply Applications
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Status
All versions are Not Recommended for New Designs.
Description
The MAX5074 isolated PWM power IC features integrated switching power MOSFETs connected in a voltage-clamped, two-transistor, power-circuit configuration. This device can be used in both forward and flyback configurations with a wide input voltage range from 11V to 76V and up to 15W of output power.
The voltage-clamped power topology enables full recovery of stored magnetizing and leakage inductive energy for enhanced efficiency and reliability. A look-ahead signal for driving secondary-side synchronous rectifiers can be used to increase efficiency.
A wide array of protection features includes UVLO, overtemperature shutdown, and short-circuit protection with hiccup current limit for enhanced performance and reliability. Operation up to 500kHz allows smaller external magnetics and capacitors.
The MAX5074 is rated for operation over the -40°C to +125°C temperature range and is available in a 20-pin TSSOP package.
Warning: The MAX5074 is designed to work with high voltages. Exercise caution.
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Data Sheet
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Key Features
- Clamped, Two-Switch Power IC for High Efficiency
- No Reset Winding Required
- Up to 15W Output Power
- Bias Voltage Regulator with Automatic High-Voltage Supply Turn-Off
- 11V to 76V Wide Input Voltage Range
- Integrated High-Voltage 0.4Ω Power MOSFETs
- Feed-Forward Voltage-Mode Control For Fast Input Transient Rejection
- Programmable Brownout Undervoltage Lockout
- Internal Overtemperature Shutdown
- Indefinite Short-Circuit Protection with Programmable Fault Integration
- Integrated Look-Ahead Signal for Secondary-Side Synchronous Rectification
- > 90% Efficiency with Synchronous Rectification
- Up to 500kHz Switching Frequency
- High-Power (1.74W), Small-Footprint 20-Pin Thermally Enhanced TSSOP Package
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Applications/Uses
- 48V Input, Isolated Power-Supply Modules
- ADSL Line Cards
- ADSL Line-Driver Power Supplies
- Distributed Power Systems with 48V Bus
- High-Efficiency Telecom/Datacom Power Supplies
- IEEE 802.3af PD Power Supplies
- Isolated IP Phone Power Supplies
- WLAN Access-Point Power Supplies
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Diagram
 Typical Application Circuit
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX5074AUP
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NRND |
TSSOP-EP;20 pin;42.9 mm²
Outline Drawing:21-0108 (PDF)
Land Pattern: 90-0115 (PDF)
Use pkgcode/variation: U20E-4*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5074AUP+
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NRND |
TSSOP-EP;20 pin;42.9 mm²
Outline Drawing:21-0108 (PDF)
Land Pattern: 90-0115 (PDF)
Use pkgcode/variation: U20E+4*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5074AUP+T
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NRND |
TSSOP-EP;20 pin;42.9 mm²
Outline Drawing:21-0108 (PDF)
Land Pattern: 90-0115 (PDF)
Use pkgcode/variation: U20E+4*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5074AUP-T
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NRND |
TSSOP;20 pin
Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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| MAX5074EVKIT |
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| MAX5074A |
Power IC with Integrated MOSFETs for Isolated IEEE 802.3af PD and Telecom Power-Supply Applications |
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3312
Rev 0;
2004-07-30
This page last modified: 2010-08-13
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