NS公司的LMZ23610是SIMPLE SWITCHER" title="SIMPLE SWITCHER">SIMPLE SWITCHER系列10A電源模塊,最大輸入電壓36V,具有電流共享特性.總輸出功率最大為50W,輸出電流10A,輸入電壓6V-36V,輸出電壓0.8V-6V,效率高達90%,主要用在POL轉換器,空間限制/高熱要求的應用以及負電壓應用.本文介紹了LMZ23610性能優勢, 電指標和主要特性, 簡化應用電路圖以及評估板電路圖, 電流共享評估板材料清單以及評估板連接圖.

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性能優勢:

■ 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電指標:

■ 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應用:

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

■ Time critical projects

■ Space constrained / high thermal requirement applications

■ Negative output voltage applications

圖1.LMZ23610簡化應用電路圖

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板指標:

• 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

圖2.LMZ23610板外形圖

圖3.LMZ23610簡化電路圖

圖4.LMZ23610評估板電路圖

圖5.LMZ23610評估板連接圖

LMZ23610電流共享評估板材料清單: 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


詳情請見:
http://www.national.com/ds/LM/LMZ23610.pdf
和
http://www.national.com/an/AN/AN-2093.pdf