MAX15004AAUE(2007) データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX15004AAUE
(Rev.:2007)

4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers

Maxim Integrated 

19-0723; Rev 1; 11/07

EVAALVUAAILTAIOBNLEKIT

4.5V to 40V Input Automotive

Flyback/Boost/SEPIC Power-Supply Controllers

General Description

The MAX15004A/B/MAX15005A/B high-performance,

current-mode PWM controllers operate at an automo-

tive input voltage range from 4.5V to 40V (load dump).

The input voltage can go down as low as 2.5V after

startup if VCC is supplied by an external bias voltage.

The controllers integrate all the building blocks neces-

sary for implementing fixed-frequency isolated/noniso-

lated power supplies. The general-purpose boost,

flyback, forward, and SEPIC converters can be

designed with ease around the MAX15004/MAX15005.

The current-mode control architecture offers excellent

line-transient response and cycle-by-cycle current limit

while simplifying the frequency compensation.

Programmable slope compensation simplifies the

design further. A fast 60ns current-limit response time,

low 300mV current-limit threshold makes the controllers

suitable for high-efficiency, high-frequency DC-DC con-

verters. The devices include an internal error amplifier

and 1% accurate reference to facilitate the primary-side

regulated, single-ended flyback converter or nonisolat-

ed converters.

An external resistor and capacitor network programs

the switching frequency from 15kHz to 500kHz (1MHz for

the MAX15005A/B). The MAX15004A/B/MAX15005A/B

provide a SYNC input for synchronization to an external

clock. The maximum FET-driver duty cycle for the

MAX15004A/B is 50%. The maximum duty cycle can be

set on the MAX15005A/B by selecting the right combi-

nation of RT and CT.

The input undervoltage lockout (ON/OFF) programs the

input-supply startup voltage and can be used to shut-

down the converter to reduce the total shutdown cur-

rent down to 10µA. Protection features include

cycle-by-cycle and hiccup current limit, output overvolt-

age protection, and thermal shutdown.

The MAX15004A/B/MAX15005A/B are available in

space-saving 16-pin TSSOP and thermally enhanced

16-pin TSSOP-EP packages. All devices operate over

the -40°C to +125°C automotive temperature range.

Applications

Automotive

Vacuum Fluorescent Display (VFD) Power

Supply

Isolated Flyback, Forward, Nonisolated SEPIC,

Boost Converters

Features

♦ Wide 4.5V to 40V Operating Input Voltage Range

♦ Operates Down to 2.5V (with Bootstrapped VCC

Bias)

♦ Current-Mode Control

♦ Low 300mV, 5% Accurate Current-Limit Threshold

Voltage

♦ Internal Error Amplifier with 1% Accurate Reference

♦ RC Programmable 4% Accurate Switching

Frequency

♦ Switching Frequency Adjustable from 15kHz to

500kHz (1MHz for the MAX15005A/B)

♦ External Frequency Synchronization

♦ 50% (MAX15004) or Adjustable (MAX15005)

Maximum Duty Cycle

♦ Programmable Slope Compensation

♦ 10µA Shutdown Current

♦ Cycle-by-Cycle and Hiccup Current-Limit

Protection

♦ Overvoltage and Thermal Shutdown Protection

♦ -40°C to +125°C Automotive Temperature Range

♦ 16-Pin TSSOP or 16-Pin Thermally Enhanced

TSSOP-EP Packages

Ordering Information

PART

PIN-

PACKAGE

MAX DUTY

CYCLE

PKG

CODE

MAX15004AAUE+ 16 TSSOP–EP*

50%

U16E-3

MAX15004BAUE+ 16 TSSOP

50%

U16-2

MAX15005AAUE+ 16 TSSOP–EP* Programmable U16E-3

MAX15005BAUE+ 16 TSSOP

Programmable U16-2

Note: All devices are specified over the -40°C to +125°C tem-

perature range.

+Denotes lead-free package.

*EP = Exposed pad.

Pin Configurations appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

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.

Share Link: