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MAX15004A Dataheets PDF



Part Number MAX15004A
Manufacturers Maxim Integrated
Logo Maxim Integrated
Description 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers
Datasheet MAX15004A DatasheetMAX15004A Datasheet (PDF)

EVALUATION KIT AVAILABLE MAX15004A/B-MAX15005A/B General Description The MAX15004A/B/MAX15005A/B high-performance, current-mode PWM controllers operate at an automotive input voltage range from 4.5V to 40V (load dump). The input voltage can go lower than 4.5V after startup if IN is bootstrapped to a boosted output voltage. The controllers integrate all the building blocks necessary for implementing fixed-frequency isolated/nonisolated power supplies. The general-purpose boost, flyback, forward,.

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EVALUATION KIT AVAILABLE MAX15004A/B-MAX15005A/B General Description The MAX15004A/B/MAX15005A/B high-performance, current-mode PWM controllers operate at an automotive input voltage range from 4.5V to 40V (load dump). The input voltage can go lower than 4.5V after startup if IN is bootstrapped to a boosted output voltage. The controllers integrate all the building blocks necessary for implementing fixed-frequency isolated/nonisolated 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 linetransient 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 converters. The devices include an internal error amplifier and 1% accurate reference to facilitate the primary-side regulated, single-ended flyback converter or nonisolated 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 combination of RT and CT. The input undervoltage lockout (ON/OFF) programs the input-supply startup voltage and can be used to shutdown the converter to reduce the total shutdown current down to 10µA. Protection features include cycle-by-cycle and hiccup current limit, output over-voltage protection, and thermal shutdown. The MAX15004A/B/MAX15005A/B are available in spacesaving 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 Pin Configuration appears at end of data sheet. 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers Benefits and Features ●● Wide Supply Voltage Range Meets Automotive Power-Supply Operating Requirement Including “Cold Crank” Conditions • 4.5V to 40V Operating Input Voltage Range (Can Operate at Lower Voltage After Startup if Input is Bootstrapped to a Boosted Output) ●● Control Architecture Offers Excellent Performance While Simplifying the Design • Current-Mode Control • 300mV, 5% Accurate Current-Limit Threshold Voltage • Programmable Slope Compensation • 50% (MAX15004) or Adjustable (MAX15005) Maximum Duty Cycle ●● Accurate, Adjustable Switching Frequency and Synchronization Avoids Interference with Sensitive Radio Bands • Switching Frequency Adjustable from 15kHz to 500kHz (1MHz for the MAX15005A/B) • RC Programmable 4% Accurate Switching Frequency • External Frequency Synchronization ●● Built-In Protection Capability for Improved System Reliability • Cycle-by-Cycle and Hiccup Current-Limit Protection • Overvoltage and Thermal-Shutdown Protection • -40°C to +125°C Automotive Temperature Range • AEC-Q100 Qualified Ordering Information PART PIN-PACKAGE MAX DUTY CYCLE MAX15004AAUE+ 16 TSSOP-EP* 50% MAX15004AAUE/V+ 16 TSSOP-EP* 50% MAX15004BAUE+ 16 TSSOP 50% MAX15004BAUE/V+ 16 TSSOP 50% MAX15005AAUE+ 16 TSSOP-EP* Programmable MAX15005AAUE/V+ 16 TSSOP-EP* Programmable MAX15005BAUE+ 16 TSSOP Programmable MAX15005BAUE/V+ 16 TSSOP Programmable Note: All devices are specified over the -40°C to +125°C temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. *EP = Exposed pad. 19-0723; Rev 5; 9/15 MAX15004A/B-MAX15005A/B 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers Absolute Maximum Ratings IN to SGND............................................................-0.3V to +45V IN to PGND............................................................-0.3V to +45V ON/OFF to SGND.......................................-0.3V to (VIN + 0.3V) OVI, SLOPE, RTCT, SYNC, SS, FB, COMP, CS to SGND...................................... -0.3V to (VREG5 + 0.3V) VCC to PGND.........................................................-0.3V to +12V REG5 to SGND........................................................-0.3V to +6V OUT to PGND........................................... -0.3V to (VCC + 0.3V) SGND to PGND.....................................................-0.3V to +0.3V VCC Sink Current (clamped mode).....................................35mA OUT Current (< 10μs transient)..........................................±1.5A Continuous Power Dissipation* (TA = +70°C) 16-Pin TSSOP-EP (derate 21.3mW/°C above +70°C).............................................................1702mW 16.


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