National Semiconductor LP3972 Скачать руководство пользователя | Manualshive

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Layout Details

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Figure 8. Ground Plane

Figure 9. Power Plane

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AN-1621 LP3972 USB Evaluation Board Rev B

SNVA235A – May 2007 – Revised April 2013

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Copyright © 2007–2013, Texas Instruments Incorporated

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Содержание LP3972

Страница 1: ...ctions of the chip are controlled by the I2 C interface The I2 C interface on the rev B and later USB boards are driven via a COP8 microprocessor which supports a connection via the USB port and offer...

Страница 2: ...s and LED monitoring Buck switcher ouputs and LED monitoring Power selection USB External External VCC Pads Turret pins Evaluation Board Kit Overview www ti com Figure 1 LP3972 Evaluation Board Versio...

Страница 3: ...L I D I2 C Clock Input 23 FB2 Feedback Buck2 I A Buck Switcher 2 Feedback 24 nRST Out O D Reset Output 25 LDO_VOUT_5 O P LDO5 Output 26 VIN2 LDO 5 Only I P Battery Input Power for LDO5 27 VDDA I P Ana...

Страница 4: ...priate rechargeable cell into supplied holder 13 Switches PKEY nTJ and SP are provided for use in normal evaluation mode 7 List of Components Item Qty Reference Value Pkg Manuf Part Number 1 5 C1 C21...

Страница 5: ...lator SOT 23 5L Texas LP3984 2 0 Instruments 33 1 U6 Voltage Converter SOT 23 6 Texas LM2664M6 Instruments 34 1 J1 100 mil Header 2 pos Amp 1 2 4 103239 0 02 35 1 J2 USB Receptacle 4 pos FCI 61729 001...

Страница 6: ...Output for nBATT Fault Outside Pin of Connector is Grd J6 2 Output for nREST Outside Pin of Connector is Grd J6 3 GPO 1 output Outside Pin of Connector is Grd J6 4 GPO 2 output Outside Pin of Connecto...

Страница 7: ...the buck control an option for hold or go can be selected Note voltage will not change until the go selection is made The virtual voltmeters can be activated by selecting Poll Status after which an A...

Страница 8: ...m 10 Layout Details Figure 4 Top Silkscreen Figure 5 Top Trace 8 AN 1621 LP3972 USB Evaluation Board Rev B SNVA235A May 2007 Revised April 2013 Submit Documentation Feedback Copyright 2007 2013 Texas...

Страница 9: ...Details Figure 6 Bottom Trace Figure 7 Bottom Silkscreen 9 SNVA235A May 2007 Revised April 2013 AN 1621 LP3972 USB Evaluation Board Rev B Submit Documentation Feedback Copyright 2007 2013 Texas Instru...

Страница 10: ...ww ti com Figure 8 Ground Plane Figure 9 Power Plane 10 AN 1621 LP3972 USB Evaluation Board Rev B SNVA235A May 2007 Revised April 2013 Submit Documentation Feedback Copyright 2007 2013 Texas Instrumen...

Страница 11: ...ut Details Figure 10 Bare Board Component Locations 11 SNVA235A May 2007 Revised April 2013 AN 1621 LP3972 USB Evaluation Board Rev B Submit Documentation Feedback Copyright 2007 2013 Texas Instrument...

Страница 12: ...P3972 Flex_PMU Evaluation Board Schematic Figure 11 LP3972 Flex_PMU Evaluation Board Schematic 12 AN 1621 LP3972 USB Evaluation Board Rev B SNVA235A May 2007 Revised April 2013 Submit Documentation Fe...

Страница 13: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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