C&D西恩迪LSN-0.75/16-D12模块电源技术详解

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"C&D西恩迪的LSN-0.75/16-D12模块电源说明书详细介绍了这款非隔离式DC/DC转换器的特性、功能和应用。" LSN-0.75/16-D12是C&D西恩迪公司生产的一款直流到直流转换器，它特别设计用于在12V隔离总线供电的系统中，为多个非隔离的降压稳压器提供电源。这款模块电源的主要特点包括： 1. **非隔离设计**：LSN-16AD12系列不具有电气隔离，这意味着输入和输出之间没有物理隔离。这简化了设计，降低了成本，但可能不适用于需要电气隔离的应用。 2. **输入电压范围**：该模块电源接受10V至14V的输入电压，这使得它能够适应广泛的电源环境。 3. **输出电压选项**：LSN-0.75/16-D12可提供0.75V、1V、1.2V、1.5V、1.8V、2.5V、3.3V或5V的输出电压，且在全负荷下可达到16A的电流输出，适合高功率需求的应用。 4. **高效能**：在最小的空间内实现最高的效率，这是LSN系列的一大亮点，它能够在紧凑的封装中提供强大的转换能力。 5. **封装形式**：LSN-16AD12采用D12 SIP（单行封装），占用空间极小，仅为0.72平方英寸（4.6平方厘米）。垂直安装的设计使得它能够适应有限的电路板空间，甚至可以反向安装以满足竞争对手的保持区域要求。 6. **易于使用**：通常情况下，LSN-16AD12不需要外部组件，简化了系统集成。内置的控制电路包括PWM控制器、电流感应、参考及误差放大器，以及ON/OFF控制和输出电压调整功能。 7. **应用领域**：由于其高效率和紧凑的尺寸，LSN-0.75/16-D12适用于点对点或负载电源处理，特别适合那些需要在有限空间内提供大电流低电压输出的嵌入式系统，如服务器、通信设备和工业控制系统。 C&D西恩迪的LSN-0.75/16-D12模块电源是为需要高效、紧凑型电源解决方案的工程师量身打造的，它在减少外部组件的需求的同时，提供了稳定可靠的电源转换性能。在设计过程中，工程师应根据具体应用需求，考虑其非隔离特性、输出电压选择、效率以及封装尺寸等因素。

Physical

Outline Dimensions See Mechanical Speciﬁcations

Pin Dimensions/Material 0.03" (0.76mm) round pins with tin plate

over copper alloy

Weight 0.3 ounces (9g)

Flammability Rating UL94V-0

EMI Conducted and Radiated FCC Part 15, EN55022 may require

external ﬁlter

Safety UL/cUL 60950, CSA-C22.2 No.234

IEC/EN 60950

MDC_LSN16AD12_A02 Page 3 of 12

D C / D C C O N V E R T E R S

www.cd4power.comwww.cd4power.com

P O W E R E L E C T R O N I C S D I V I S I O N

LSN-16A D12 Models

Single Output, Non-Isolated, 12VIN, 0.75-5VOUT, 16A, DC/DC's in SIP Packages

Performance/Functional Speciﬁcations

Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀

T E C H N I C A L N O T E S

Input Voltage:

Continuous or transient 14Vdc maximum

On/Off Control

(Pin 11) +VIN

Input Reverse-Polarity Protection None

Output Overvoltage Protection

None

Output Current Current limited. Devices can

withstand sustained output short

circuits without damage.

Storage Temperature –55 to +125°C

Lead Temperature (soldering, 10 sec.) +300°C, 10 seconds maximum.

Refer to solder proﬁle.

These are stress ratings. Exposure of devices to any of these conditions may adversely

affect long-term reliability. Proper operation under conditions other than those listed in the

Performance/Functional Speciﬁcations Table is not implied.

Absolute Maximum Ratings

Return Current Paths

The LSN D12 SIP’s are non-isolated DC/DC converters. Their two Common

pins (pins 5 and 6) are connected to each other internally (see Figure 1). To

the extent possible (with the intent of minimizing ground loops), input return

current should be directed through pin 6 (also referred to as –Input or

Input Return), and output return current should be directed through pin 5

(also referred to as –Output or Output Return). Any on/off control signals

applied to pin 11 (On/Off Control) should be referenced to Common

(speciﬁcally pin 6).

I/O Filtering and Noise Reduction

All models in the LSN D12 Series are tested and speciﬁed with external

22µF tantalum input and output capacitors. These capacitors are necessary

to accommodate our test equipment and may not be required to achieve?

desired performance in your application. The LSN D12's are designed with

high-quality, high-performance internal I/O caps, and will operate within spec

in most applications with no additional external components.

Input

Input Voltage Range 10-14 Volts (12V nominal)

Input Current:

Normal Operating Conditions See Ordering Guide

Standby/Off Mode 5.7mA

Output Short-Circuit Condition 30-60mA

Input Reﬂected Ripple Current

➁ 30-100mAp-p

Input Filter Type Capacitive

Start-Up Voltage 9 Volts

Overvoltage Protection None

Reverse-Polarity Protection None

Undervoltage Shutdown 8 Volts

No-load Input Current 50-80mA

Remote On/Off Control

➄

–Negative Logic ON = no connection or open

(internal pull down), 0 to +0.4V

OFF = +2.8V to +V

IN or pulled high

Remote Control On/Off Current 3mA maximum

Output

Voltage Output Accuracy (50% load) ±1.25% maximum

Minimum Loading

➀ No minimum load

Maximum Output Power See Ordering Guide

OUT x IOUT must not exceed max. power

Maximum Capacitive Loading 2,000µF (low ESR, OSCON) or

10,000

µF (electrolytic)

VOUT Trim Range ±10%

Sense Input Range +10% of VOUT

Ripple/Noise (20 MHz bandwidth) See Ordering Guide

Total Accuracy ±3% over line, load and temperature

Efﬁciency See Ordering Guide

Overcurrent Detection and

Short Circuit Protection

Current-limiting Detection 23-29 Amps

Short Circuit Detection 98% of V

OUT setting ➅

Short Circuit Protection Method Hiccup with autorecovery

See Technical Notes

Short Circuit Current 270-600mA (model dependent)

Short Circuit Duration Continuous, output shorted to ground

Temperature Coefﬁcient ±0.02% per °C

Dynamic Characteristics

Transient Response

(50 to 100% load step to ±2% of Vout) 50

µsec typical, 100µsec maximum

Start-Up Time On/Off to VOUT 20msec for VOUT = nominal

Switching Frequency 230-370kHz (model dependent)

Environmental

Calculated MTBF ➃ TBD Hours

Operating Temperature:

(Ambient)

No derating, vertical mount –40 to +53°C, natural convection

With derating See derating curves

Storage Temperature Range –55 to +125°C

Thermal Protection/Shutdown 115°C

Density Altitude 0 to 10,000 feet

Relative Humidity 10% to 90%, non-condensing

➀ All models are tested and speciﬁed with external 22µF tantalum input and output capacitors.

These capacitors are necessary to accommodate our test equipment and may not be required

to achieve speciﬁed performance in your applications. All models are stable and regulate within

spec under no-load conditions.

➁ Input Ripple Current is tested and speciﬁed over a 5-20MHz bandwidth. Input ﬁltering is

IN = 200µF, CBUS = 1000µF, LBUS = 1µH.

➂ Current limit inception is given at either cold start-up or after warm-up.

➃ Mean Time Before Failure is calculated using the Telcordia (Bellcore) SR-332 Method 1, Case 3,

ground ﬁxed conditions, T

CASE = +25°C, full load, natural convection, +67°C max. PCB temp.

➄ The On/Off Control (pin 11) may be driven with open-collector logic or by applying appropriate

external voltages which are referenced to Common, pins 5 and 6.

➅ Short circuit shutdown begins when the output voltage degrades approximately 2% from the

selected setting.

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