MAX17499BAUB+ Maxim Integrated Products, MAX17499BAUB+ Datasheet

MAX17499BAUB+

Manufacturer Part Number

MAX17499BAUB+

Description

Manufacturer

Maxim Integrated Products

Datasheets

1.MAX17499AAUB.pdf (18 pages)

2.MAX17499AAUB.pdf (18 pages)

Specifications of MAX17499BAUB+

Pack_quantity

Comm_code

85423990

Lead_time

Current page: 1 of 18
Download datasheet (253Kb)

The MAX17499/MAX17500 current-mode PWM con-

trollers contain all the control circuitry required for the

design of wide-input-voltage isolated and nonisolated

power supplies. The MAX17499 is well suited for low

input voltage (9.5V DC to 24V DC) power supplies. The

MAX17500 is well suited for universal input (rectified

85V AC to 265V AC) or telecom (-36V DC to -72V DC)

power supplies.

The ICs contain an internal error amplifier that regulates

the tertiary winding output voltage that is used in prima-

ry-side-regulated isolated power supplies. Primary-side

regulation eliminates the need for an optocoupler. An

input undervoltage lockout (UVLO) is provided for pro-

gramming 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 programma-

ble with a voltage-divider. A UVLO/EN input is used to

shut down the devices. Internal digital soft-start elimi-

nates output voltage overshoot.

The MAX17500 has an internal bootstrap UVLO with

large hysteresis that requires a minimum 23.6V for start-

up. The MAX17499 does not have the internal bootstrap

UVLO and can be biased directly from a minimum volt-

age of 9.5V.

The switching frequency for the ICs is programmable

with an external resistor. The MAX17499A/MAX17500A

provide a 50% maximum duty-cycle limit, while the

MAX17499B/MAX17500B provide a 75% maximum

duty-cycle limit. These devices are available in 10-pin

μMAX

-40°C to +125°C temperature range.

19-5485; Rev 1; 7/11

Selector Guide appears at end of data sheet.

μMAX is a registered trademark of Maxim Integrated Products, Inc.

Warning: The ICs are designed to work with high voltages. Exercise caution.

+ Denotes a lead(Pb)-free/RoHS-compliant package.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX17499AAUB+

MAX17499BAUB+

MAX17500AAUB+

MAX17500BAUB+

PART

packages and are rated for operation over the

________________________________________________________________ Maxim Integrated Products

General Description

Programmable Switching Frequency

MAX

Current-Mode PWM Controllers with

(%)

STARTUP VOLTAGE (V)

9.5

o Current-Mode Control

o Programmable Switching Frequency Up to 625kHz

o Accurate UVLO Threshold (1%)

o Open-Drain UVLO Flag Output with Internal Delay

o 36V to 72V Telecom Voltage Range

o Universal Offline Input Voltage Range

o 9.5V to 24V Input (MAX17499)

o Digital Soft-Start

o Internal Bootstrap UVLO with Large Hysteresis

o Internal Error Amplifier with 1.5% Accurate

o 50µA (typ) Startup Supply Current

o 50% Maximum Duty-Cycle Limit

o 75% Maximum Duty-Cycle Limit

o 60ns Cycle-by-Cycle Current-Limit Propagation

o Available in Tiny 10-Pin µMAX Packages

(MAX17500)

Reference

(MAX17499A/MAX17500A)

(MAX17499B/MAX17500B)

Delay

Rectified 85V AC to 265V AC (MAX17500)

1/2, 1/4, and 1/8 Brick Power Modules

High-Efficiency, Isolated Telecom Power

Supplies

Networking/Servers

Isolated Keep-Alive Power Supplies

12V Boost and SEPIC Regulators

Isolated and Nonisolated High-Brightness LED

Power Supplies

Industrial Power Conversion

-40°C to +125°C

TEMP RANGE

Ordering Information

Applications

PIN-PACKAGE

Features

10 μMAX

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