NS公司的LMZ23610是SIMPLE SWITCHER" title="SIMPLE SWITCHER">SIMPLE SWITCHER系列10A电源模块,最大输入电压36V,具有电流共享特性.总输出功率最大为50W,输出电流10A,输入电压6V-36V,输出电压0.8V-6V,效率高达90%,主要用在POL转换器,空间限制/高热要求的应用以及负电压应用.本文介绍了LMZ23610性能优势, 电指标和主要特性, 简化应用电路图以及评估板电路图, 电流共享评估板材料清单以及评估板连接图.

LMZ23610: 10A SIMPLE SWITCHER Power Module with 36V Maximum Input Voltage and Current Sharing

The newest LMZ2-Series power modules are available in output currents up to 10A with additional features for powering high current intermediate rails, FPGAs, and noise sensitive applications. They also feature a frequency synchronization pin that controls the switching frequency of the internal circuitry, and a current sharing pin for paralleling multiple power modules together for achieving up to 60A of output current.

The LMZ23610 SIMPLE SWITCHER© power module is an easy-to-use step-down DC-DC solution capable of driving up to 10A load. The LMZ23610 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ23610 can accept an input voltage rail between 6V and 36V and deliver an adjustable and highly accurate output voltage as low as 0.8V. The LMZ23610 only requires two external resistors and three external capacitors to complete the power solution. The LMZ23610 is a reliable and robust design with the following protection features: thermal shutdown, input under-voltage lockout, output over-voltage protection, short-circuit protection, output current limit, and allows startup into a pre-biased output. The sync input allows synchronization over the 350 to 600 kHz switching frequency range.

LMZ23610性能优势:

■ High efficiency reduces system heat generation

■ Low radiated emissions (EMI) complies with EN55022 class B standard

■ Only 7 external components

■ Low output voltage ripple

■ No external heat sink required

■ Simple current sharing for higher current applications

LMZ23610电指标:

■ 50W maximum total output power

■ Up to 10A output current

■ Input voltage range 6V to 36V

■ Output voltage range 0.8V to 6V

■ Efficiency up to 90%

LMZ23610主要特性:

■ Integrated shielded inductor

■ Simple PCB layout

■ Frequency synchronization input (350 kHz to 600 kHz)

■ Current sharing capability

■ Flexible startup sequencing using external soft-start, tracking and precision enable

■ Protection against inrush currents and faults such as input UVLO and output short circuit

■ –40℃ to 125℃ junction temperature range

■ Single exposed pad and standard pinout for easy mounting and manufacturing

■ Fully enabled for Webench Power Designer

■ Pin compatible with LMZ22008/06, LMZ12010/08/06,LMZ23610/08/06, and LMZ13610/08/06

LMZ23610应用:

■ Point of load conversions from 12V and 24V input rail

■ Time critical projects

■ Space constrained / high thermal requirement applications

■ Negative output voltage applications

图1.LMZ23610简化应用电路图

The LMZ23610/8/6 and LMZ22010/8/6 SIMPLE SWITCHER power modules are easy-to-use DC-DC solution capableof driving up to a 10, 8 or 6 ampere load. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering. The LMZ23610/8/6 can accept an input voltage rail between 6V and 36V and the LMZ22010/8/6 can accept an input voltage rail between 6V and 20V.

The current sharing evaluation board is designed so that four modules can be easily connected to supply up to a 40 amp load. More can be connected as long as care is taken to not exceed the current capabilities of the banana plug connectors and the 5-amp per pin rating of the edge board connector.

The current sharing evaluation board is highly configurable.

The output voltage can be changed to 5V, 3.3V, 2.5V or 1.2V with a jumper change. The external soft-start capacitor facilitates a controlled and adjustable startup rise time of the output. The board temperature can be measured with the onboard resistor. The UVLO can be adjusted by adding one resistor. To simplify the synchronization of the modules an onboard 555 timer provides an adjustable frequency clock from 350 to 600 kHz.

The LMZ23610 and LMZ22010 family is a reliable and robust solution with the following features: loss-less cycle-by-cycle valley current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lockout, and will start up into a pre-biased output.

LMZ23610板指标:

• VIN = 6V to 36V (LMZ23610/8/6)

• VIN = 6V to 20V (LMZ22010/8/6)

• VOUT = 1.2V, 2.5V, 3.3V or 5V (minimum input voltage of 7V required for 5V output)

• IOUT = 0 to 10, 8, or 6 Amps

• θJA = 8.8 ℃ / W, θJC = 1.0 ℃/W

• Designed on four layers; Inner are 2 oz copper; Outer are 2 oz copper.

• Measures 3.54" x 3.54" (90 mm x 90 mm) and is 62 mils (1.57 mm) thick of FR4 laminate material

图2.LMZ23610板外形图

图3.LMZ23610简化电路图

图4.LMZ23610评估板电路图

图5.LMZ23610评估板连接图

LMZ23610电流共享评估板材料清单: VIN = 6V-36V (20V), VOUT = 1.2/3.3V/5V, IOUT (MAX) =10/08/06A

Current Sharing Evaluation Board Bill of Materials, VIN = 6V to 36V (20V), VOUT = 1.2/3.3V/5V, IOUT (MAX) =10/08/06A


详情请见:
http://www.national.com/ds/LM/LMZ23610.pdf
和
http://www.national.com/an/AN/AN-2093.pdf