MAX15000

Current-Mode PWM Controllers with Programmable Switching Frequency

Isolated/Nonisolated Current-Mode PWM Controllers in Tiny 10-Pin µMAX Packages with Adjustable Frequency from 12.5kHz to 625kHz


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Description

The MAX15000/MAX15001 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX15000 is well suited for universal input (rectified 85VAC to 265VAC) or telecom (-36VDC to -72VDC) power supplies. The MAX15001 is well suited for low input voltage (9.5VDC to 24VDC) power supplies.

The MAX15000/MAX15001 contain an internal error amplifier that regulates the tertiary winding output voltage which is used in primary-side regulated isolated power supplies. Primary-side regulation eliminates 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. An open-drain UVLO flag output, with 210µs internal delay, allows the sequencing of a secondary-side controller. The input-supply start voltage is externally programmable with a voltage divider. A UVLO/EN input is used to shutdown the MAX15000/MAX15001. Internal digital soft-start eliminates output voltage overshoot.

The MAX15000 has an internal bootstrap UVLO with large hysteresis that requires a minimum 23.6V for startup. The MAX15001 does not have the internal bootstrap UVLO and can be biased directly from a minimum voltage of 9.5V.

The switching frequency for the MAX15000/MAX15001 is programmable with an external resistor. The MAX15000A/MAX15001A provide a 50% maximum duty-cycle limit, while the MAX15000B/MAX15001B provide a 75% maximum duty-cycle limit. These devices are available in 10-pin µMAX® packages and are rated for operation over the -40°C to +85°C temperature range.
MAX15000, MAX15001: Typical Operating Circuit MAX15000, MAX15001: Typical Operating Circuit Enlarge+

Key Features

  • Current-Mode Control
  • Programmable Switching Frequency Up to 625kHz
  • Accurate UVLO Threshold (1%)
  • Open-Drain UVLO Flag Output with Internal Delay
  • 36V to 72V Telecom Voltage Range
  • Universal Offline Input Voltage Range
    • Rectified 85VAC to 265VAC (MAX15000)
  • 9.5V to 24V Input (MAX15001)
  • Digital Soft-Start
  • Internal Bootstrap UVLO With Large Hysteresis (MAX15000)
  • Internal Error Amplifier with 1.5% Accurate Reference
  • 50µA (typ) Startup Supply Current
  • 50% Maximum Duty-Cycle Limit (MAX15000A/MAX15001A)
  • 75% Maximum Duty-Cycle Limit (MAX15000B/MAX15001B)
  • 60ns Cycle-by-Cycle Current-Limit Propagation Delay
  • Available in Tiny 10-Pin µMAX Packages

Applications/Uses

  • 1/2, 1/4, and 1/8th Brick Power Modules
  • 12V Boost and SEPIC Regulators
  • High-Efficiency, Isolated Telecom Power Supplies
  • Industrial Power Conversion
  • Isolated and Nonisolated High-Brightness LED Power Supplies
  • Isolated Keep-Alive Power Supplies
  • Networking/Server
Part NumberApplication (VIN)VIN
(V)
VIN
(V)
TopologyFeedbackFreq.
(kHz)
Duty Cycle
(%)
ISTARTUP
(mA)
ICC
(mA)
Gate Drive Current
(A)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxmaxmaxmaxmaxSee Notes
MAX15000 
Networking (48V)
Power Over Ethernet (32-58V)
Telecom (36-72V)
Universal Off-line (90-240VAC)
241000
Flyback
Single-Ended Forward
Primary Side625
50
75
0.0921-40 to +85
UMAX/10
-
MAX15001 
Base Station (24V)
Industrial (24V)
9.524
UMAX/10
$1.39 @1k
See All Isolated Power Supplies (25)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX15000AEVKIT: Evaluation Kit for MAX15000A

Quality and Environmental Data

Product Reliability Reports: MAX15000.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX15000AEUB+
  • MAX15000AEUB+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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