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MAX15004BAUE Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX15004BAUE Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 29 page 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 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers ________________________________________________________________ Maxim Integrated Products 1 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 Ordering Information 19-0723; Rev 1; 11/07 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. 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. EVALUATION KIT AVAILABLE |
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