Telit Communications S p A ML865C1NA User Guide

Mod. 0805 2017-01 Rev.6
ML865C1
HW User Guide
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1VV0301493 Rev. 2 Page 2 of 86 2018-05-11
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

NOTICE

While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this document has been carefully checked and is believed to be reliable. However, no responsibility is assumed for inaccuracies or omissions. Telit reserves the right to make changes to any products described herein and reserves the right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of revisions or changes. Telit does not assume any liability arising out of the application or use of any product, software, or circuit described herein; neither does it convey license under its patent rights or the rights of others.
It is possible that this publication may contain references to, or information about Telit products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that Telit intends to announce such Telit products, programming, or services in your country.

COPYRIGHTS

This instruction manual and the Telit products described in this instruction manual may be, include or describe copyrighted Telit material, such as computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and its licensors certain exclusive rights for copyrighted material, including the exclusive right to copy, reproduce in any form, distribute and make derivative works of the copyrighted material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this instruction manual may not be copied, reproduced, distributed, merged or modified in any manner without the express written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a product.

COMPUTER SOFTWARE COPYRIGHTS

The Telit and 3rd Party supplied Software (SW) products described in this instruction manual may include copyrighted Telit and other 3rd Party supplied computer programs stored in semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer programs contained in the Telit products described in this instruction manual may not be copied (reverse engineered) or reproduced in any manner without the express written permission of Telit or the 3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit or other 3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.
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USAGE AND DISCLOSURE RESTRICTIONS

I. License Agreements
The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.
II. Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law. No part of the software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, without prior written permission of Telit
III. High Risk Materials
Components, units, or third-party products used in the product described herein are NOT fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically disclaim any expressed or implied warranty of fitness for such High Risk Activities.
IV. Trademarks
TELIT and the Stylized T Logo are registered in Trademark Office. All other product or service names are the property of their respective owners.
V. Third Party Rights
The software may include Third Party Right software. In this case you agree to comply with all terms and conditions imposed on you in respect of such separate software. In addition to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this License shall apply to the Third Party Right software.
TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM
WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE
USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE, INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.
NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY, ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE OTHER CODE OR THE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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APPLICABILITY TABLE

PRODUCTS
ML865C1-NA
ML865C1-EA
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Contents

NOTICE 2
COPYRIGHTS ................................................................................................ 2
COMPUTER SOFTWARE COPYRIGHTS ...................................................... 2
USAGE AND DISCLOSURE RESTRICTIONS ............................................... 3
I. License Agreements ..................................................................... 3
II. Copyrighted Materials ................................................................... 3
III. High Risk Materials ....................................................................... 3
IV. Trademarks .................................................................................. 3
V. Third Party Rights ......................................................................... 3
APPLICABILITY TABLE ................................................................................ 4
CONTENTS .................................................................................................... 5
1. INTRODUCTION .......................................................................... 9
Scope ................................ ........................................................... 9
Audience....................................................................................... 9
Contact Information, Support ........................................................ 9
Text Conventions ........................................................................ 10
Related Documents .................................................................... 11
2. OVERVIEW ................................................................................ 12
3. PINS ALLOCATION ................................................................... 14
Pin-out ........................................................................................ 14
Pin Layout ................................................................................... 19
4. POWER SUPPLY ....................................................................... 20
Power Supply Requirements ....................................................... 20
Power Consumption ................................................................... 21
4.2.1. Current consumption plots .......................................................... 22
General Design Rules ................................................................. 24
4.3.1. Electrical Design Guidelines ....................................................... 24
4.3.1.1. +5V Source Power Supply Design Guidelines ............................ 24
4.3.1.2. +12V Source Power Supply Design Guidelines .......................... 25
4.3.1.3. Battery Source Power Supply Design Guidelines ........................ 26
4.3.2. Thermal Design Guidelines ......................................................... 28
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4.3.3. Power Supply PCB layout Guidelines ......................................... 29
RTC supply ................................................................................. 30
VAUX Power Output ................................................................... 31
5. DIGITAL SECTION .................................................................... 32
Logic Levels ................................................................................ 32
Power On (Auto-Turning ON ML865) .......................................... 32
Power Off.................................................................................... 35
Wake from deep sleep mode ...................................................... 35
Unconditional Shutdown ( Hardware Unconditional restart) ........ 36
Fast power down ........................................................................ 39
5.6.1. Fast Shut Down by Hardware ..................................................... 39
5.6.2. Fast Shut Down by Software....................................................... 40
Communication ports .................................................................. 40
5.7.1. USB 2.0 HS ................................................................................ 40
5.7.2. SPI.............................................................................................. 42
5.7.3. Serial Ports ................................................................................. 43
5.7.3.1. Modem serial port 1 ................................ .................................... 43
5.7.3.2. Modem serial port 2 ................................ .................................... 45
5.7.3.3. RS232 level translation ............................................................... 46
General purpose I/O ................................................................... 47
5.8.1. Using a GPIO as INPUT ............................................................. 48
5.8.2. Using a GPIO as OUTPUT ......................................................... 49
5.8.3. Indication of network service availability ..................................... 49
External SIM Holder .................................................................... 50
ADC Converter ........................................................................... 50
6. RF SECTION .............................................................................. 52
Bands Variants ........................................................................... 52
TX Output power ......................................................................... 52
RX Sensitivity ............................................................................. 52
Antenna requirements................................................................. 54
6.4.1. PCB Design guidelines ............................................................... 55
6.4.2. PCB Guidelines in case of FCC Certification .............................. 57
6.4.2.1. Transmission line design ............................................................ 57
6.4.2.2. Transmission Line Measurements .............................................. 59
6.4.2.3. Antenna Installation Guidelines ................................................... 61
7. AUDIO SECTION ....................................................................... 62
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Electrical Characteristics ............................................................. 62
Codec examples ......................................................................... 62
8. GNSS SECTION ......................................................................... 63
GNSS Signals Pin-out................................................................. 63
RF Front End Design .................................................................. 63
8.2.1. Guidelines of PCB line for GNSS Antenna .................................. 63
GNSS Antenna Requirements .................................................... 63
8.3.1. GNSS Antenna specification ....................................................... 64
8.3.2. GNSS Antenna – Installation Guidelines ................................ ..... 64
8.3.3. Powering the External LNA (active antenna) ............................... 64
GNSS Characteristics * ............................................................... 65
9. MECHANICAL DESIGN ............................................................. 66
Drawing ...................................................................................... 66
10. APPLICATION PCB DESIGN .................................................... 68
General ....................................................................................... 68
Footprint ..................................................................................... 68
PCB pad design .......................................................................... 70
PCB pad dimensions .................................................................. 70
Stencil ......................................................................................... 71
Solder paste ............................................................................... 72
Solder Reflow ............................................................................. 72
11. PACKAGING .............................................................................. 74
Tray ............................................................................................ 74
Reel ............................................................................................ 76
Moisture sensitivity ..................................................................... 76
12. CONFORMITY ASSESSMENT ISSUES .................................... 79
Approvals.................................................................................... 79
FCC certificates .......................................................................... 79
IC/ISED certificates ..................................................................... 79
FCC/ISED Regulatory notices ..................................................... 79
Declaration of Conformity ........................................................... 81
13. SAFETY RECOMMENDATIONS................................................ 82
READ CAREFULLY .................................................................... 82
14. ACRONYMS ............................................................................... 83
15. DOCUMENT HISTORY .............................................................. 85
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1. INTRODUCTION

Scope

Scope of this document is is the description of some hardware solutions useful for developing a product with the Telit ML865C1 module.

Audience

This document is intended for Telit customers, who are integrators, about to implement their application using our ML865C1 module.

Contact Information, Support

For general contact, technical support services, technical questions and report documentation errors contact Telit Technical Support at:
TS-EMEA@telit.com
TS-AMERICAS@telit.com
TS-APAC@telit.com
TS-SRD@telit.com
Alternatively, use:
http://www.telit.com/support
For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit:
http://www.telit.com
Our aim is to make this guide as helpful as possible. Keep us informed of your comments and suggestions for improvements.
Telit appreciates feedback from the users of our information.
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Text Conventions

Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur.
Caution or Warning – Alerts the user to important points about integrating the module, if these points are not followed, the module and end user equipment may fail or malfunction.
Tip or Information – Provides advice and suggestions that may be useful when integrating the module.
All dates are in ISO 8601 format, i.e. YYYY-MM-DD.
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Related Documents

80000NT10001A - SIM INTEGRATION DESIGN GUIDES Application Note
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LE910 V2

2. OVERVIEW

The aim of this document is the description of some hardware solutions useful for developing a product with the Telit ML865C1 module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced. Obviously this document cannot embrace the whole hardware solutions and products that may be designed. The wrong solutions to be avoided shall be considered as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit ML865C1 module. For further hardware details that may not be explained in this document refer to the Telit ML865C1 Product Description document where all the hardware information is reported.
NOTE: (EN) The integration of the ML865C1 cellular module within user
application shall be done according to the design rules described in this manual.
(IT) L’integrazione del modulo cellulare ML865C1 all’interno dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali
descritte in questo manuale.
(DE) Die Integration des ML865C1 Mobilfunk-Moduls in ein Gerät muß gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen.
(SL) Integracija ML865C1 modula v uporabniški aplikaciji bo morala upoštevati projektna navodila, opisana v tem priročniku.
(SP) La utilización del modulo ML865C1 debe ser conforme a los usos para los cuales ha sido deseñado descritos en este manual del usuario.
(FR) L’intégration du module cellulaire ML865C1 dans l’application de l’utilisateur sera faite selon les règles de conception décrites dans ce
manuel.
(HE)
The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communications S.p.A. for its use, nor any
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infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Telit Communications S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice.
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3. PINS ALLOCATION

Warning: ML865C1 is adopting a modified 56-pin xL865 Form Factor, pin to pin compatible with the previous 48-pin xL865 FF and with 8 additional pads.
The numbering of the pins has been changed accordingly and attention has to be paid when comparing with previous 48-pin xL865 FF design.

Pin-out

Pin
Signal
I/O Function
Type
Comment
USB HS 2.0 COMMUNICATION PORT
20
USB_D+
I/O
USB differential Data
(+)
3V
19
USB_D-
I/O
USB differential Data
(-)
3V
18
VUSB
I
Power sense for the
internal USB
transceiver.
3-5V
Internal PD
(100K)
Asynchronous Serial Port (USIF0) - Prog. / Data + HW Flow Control
1
C109/DCD/GPO
O
Output for Data carrier detect signal (DCD) to
DTE
/ GP output
CMOS
1.8V
2
C125/RING/GPO
O
Output for Ring
indicator signal (RI) to
DTE
/ GP output
CMOS
1.8V
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3
C107/DSR/GPO
O
Output for Data set
ready signal (DSR) to
DTE
/ GP output
CMOS
1.8V
4 C108/DTR/GPI
I
Input for Data terminal
ready signal (DTR)
from DTE
/ GP input
CMOS
1.8V
5
C105/RTS/GPI
I
Input for Request to
send signal (RTS)
from DTE
/ GP input
CMOS
1.8V
6
C106/CTS/GPO
O
Output for Clear to
send signal (CTS) to
DTE
/ GP output
CMOS
1.8V
9
C103/TXD
I
Serial data input (TXD) from DTE
CMOS
1.8V
10
C104/RXD
O
Serial data output to
DTE
CMOS
1.8V
SIM card interface
11
SIMVCC
-
External SIM signal –
Power supply for the
SIM
1,8 / 3V
12
SIMRST
O
External SIM signal –
Reset
1,8 / 3V
13
SIMCLK
O
External SIM signal –
Clock
1,8 / 3V
14
SIMIO
I/O
External SIM signal –
Data I/O
47k Pull
up
1,8 / 3V
ADC
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15
ADC_IN1
I
Analog/Digital
converter input
Auxiliary
52
RXD_AUX /SPI_MISO
I Auxiliary UART (RX
Data)/SPI_MISO
CMOS 1.8V
53
TXD_AUX / SPI_MOSI
O Auxiliary UART (TX
Data)/SPI_MOSI
CMOS 1.8V
Miscellaneous
7
WAKE
I
ASYNCRONOUS WAKEUP FROM PSM
1.8V
55
HW_SHUTDOWN*
I
UNCONDITIONAL SHUTDOWN
1.8V
51
V_AUX/PWRMON
O 1.8V
56
FORCED_USB_BOOT
I 1.8V
40
ANTENNA
I/O
Antenna pad – 50 Ω
RF
37
GNSS_ANT
I/O
GNSS receiver input ­50 Ω
RF
GPIO
48
GPIO_01 / DVI_WA0
I/O
GPIO01 Configurable GPIO / Digital Audio Interface (WA0)
CMOS 1.8V
47
GPIO_02 /DVI_RX
I/O
GPIO02 I/O pin Digital Audio Interface (RX)
CMOS 1.8V
46
GPIO_03 / DVI_TX
I/O
GPIO03 GPIO I/O pin/ Digital Audio Interface (TX)
CMOS 1.8V
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45
GPIO_04 / DVI_CLK
I/O
GPIO04 Configurable GPIO/ Digital Audio
Interface (CLK)
CMOS 1.8V
33
GPIO_05/ GNSS_LNA_EN
I/O
GPIO05 Configurable GPIO
CMOS 1.8V
32
GPIO_06 / SPI_CS
I/O
GPIO06 Configurable GPIO /SPI_CS
CMOS 1.8V
31
GPIO_07
I/O
GPIO07 Configurable GPIO
CMOS 1.8V
30
GPIO_08
I/O
GPIO08 Configurable GPIO
CMOS 1.8V
29
SPI_CLK
O
SPI_CLK
CMOS 1.8V
X
STAT_LED
O
STAT_LED
CMOS
1.8V
All 8 GPIO pins can be
configured
Power Supply
44
VBATT
-
Main power supply
(Baseband)
Power
43
VBATT_PA
-
Main power supply
(Radio PA)
Power
42
GND
-
Ground Power
41
GND
-
Ground Power
39
GND
-
Ground Power
38
GND
-
Ground Power
35
GND
-
Ground Power
27
GND
-
Ground Power
23
GND
-
Ground Power
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21
GND
-
Ground Power
54
GND
-
Ground Power
Reserved
8
RFU
15
RFU
16
RFU
17
RFU
22
RFU
24
RFU
25
RFU
26
RFU
28
RFU
34
RFU
36
RFU
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Pin Layout

TOP VIEW
NOTE:
The pins defined as NC/RFU shall be considered RESERVED and must not be connected to any pin in the application.
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4. POWER SUPPLY

The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performance, hence read the requirements carefully and the guidelines that will follow for a proper design.

Power Supply Requirements

The external power supply must be connected to VBATT & VBATT_PA signals and must fulfill the following requirements:
Power Supply
Value
Nominal Supply Voltage
3.8V
Operating Voltage Range
3.40 V÷ 4.20 V
Extended Voltange Range
3.20 V÷ 4.50 V
NOTE: The Operating Voltage Range MUST never be exceeded; care must be taken when designing the application’s power supply section to avoid having an excessive voltage drop. If the voltage drop is exceeding the limits it could cause a Power Off of the module. The Power supply must be higher than 3.20 V to power on the module.
Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in voltage (regarding MIN Extended Operating Voltage) MUST never be exceeded;
The “Extended Operating Voltage Range” can be used only with
completely assumption and application of the HW User guide suggestions.
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NOTE: For PTCRB approval on the final products the power supply is required to be within the “Normal Operating Voltage Range”.

Power Consumption

*Preliminary data
Mode
Average
(mA)
Mode Description
Switched off
0.008mA
Module supplied but switched off
IDLE mode
AT+CFUN=1
12 mA
Normal mode: full functionality of the module
AT+CFUN=4
11 mA
Disabled TX and RX; module is not registered on the network
AT+CFUN=5
2.3 mA
Paging cycle #64 frames (0.64 sec DRx cycle)
1.4 mA
Paging cycle #128 frames (1.28 sec DRx cycle)
1.1 mA
Paging cycle #256 frames (2.56 sec DRx cycle)
Operative Mode
LTE Data call
190 mA
CAT M1 RB=1, TX=23dBm
115 mA
CAT M1 Channel BW 10MHz, RB=1, TX=0dBm
GPRS
1TX+1RX
GSM 850/900
240 mA
GPRS Sending data mode, TX=33dBm
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4.2.1. Current consumption plots

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
0
200
400
600
800
1000
1200
1400
1600
1800
Current consumption in LTE data call CAT M1
Current Profile at Max Power (23 dBm)
Average Value at Max Power Current Profile at Low Power (<0 dBm) Average Value at Low Power
GPRS
1TX+1RX
GSM 1800/1900
170 mA
GPRS Sending data mode, TX=30dBm
PSM Mode
AT+CPSMS=1
0.008mA
No current source or sink by any connected pin
GNSS ACTIVE
GNSS
29 mA
GNSS Standalone 1Hz Acquisition ( Non-Dpo)
GNSS
30 mA
GNSS Standalone 1Hz Tracking ( Non-DPO)
GPS
28 mA
GPS Standalone 1Hz Acquisition ( Non-Dpo)
GPS
29 mA
GPS Standalone 1Hz Tracking ( Non-DPO)
Current Consumption in LTE data call CAT M1
Time (ms)
Current (mA)
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NOTE: The electrical design for the Power supply should be made ensuring it will be capable of a peak current output of at least:
0.6 A for LTE mode (3.80V supply).
2A for GPRS mode (3.80V supply).
NOTE: The reported LTE values are an average among all the product variants and bands for each network wireless technology.
The support of specific network wireless technology depends on product variant configuration.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
0
200
400
600
800
1000
1200
1400
1600
1800
Current consumption in GPRS 1 slot TX
Current Profile at Max Power (33 dBm)
Average Value at Max Power Current Profile at Low Power (< 0 dBm) Average Value at Low Power
Time (ms)
Current Consumption in GPRS 1 slot TX
Current (mA)
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General Design Rules

The principal guidelines for the Power Supply Design embrace three different design steps:
the electrical design of the power supply
the thermal design
the PCB layout

4.3.1. Electrical Design Guidelines

The electrical design of the power supply depends strongly from the power source where this power is drained. We will distinguish them into three categories:
+5V input (typically PC internal regulator output)
+12V input (typically automotive)
Battery
4.3.1.1. +5V Source Power Supply Design Guidelines
The desired output for the power supply is 3.8V, hence there's not a big difference between the input source and the desired output and a linear regulator can be used. A switching power supply will not be suited because of the low drop out requirements.
When using a linear regulator, a proper heat sink shall be provided in order to dissipate the power generated.
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to the ML865C1, a 100μF tantalum capacitor is usually suited.
Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V.
A protection diode should be inserted close to the power input, in order to save the ML865C1 from power polarity inversion.
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An example of linear regulator with 5V input is:
Guidelines
4.3.1.2. +12V Source Power Supply Design Guidelines
The desired output for the power supply is 3.8V, hence due to the big difference between the input source and the desired output, a linear regulator is not suited and shall not be used. A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by the ML865C1.
When using a switching regulator, a 500kHz or more switching frequency regulator is preferable because of its smaller inductor size and its faster transient response. This allows the regulator to respond quickly to the current peaks absorption.
In any case the frequency and Switching design selection is related to the application to be developed due to the fact the switching frequency could also generate EMC interferences.
For car PB battery the input voltage can rise up to 15,8V and this should be kept in mind when choosing components: all components in the power supply must withstand this voltage.
A Bypass low ESR capacitor of adequate capacity must be provided
in order to cut the current absorption peaks, a 100μF tantalum
capacitor is usually suited.
Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V.
For Car applications a spike protection diode should be inserted close to the power input, in order to clean the supply from spikes.
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A protection diode should be inserted close to the power input, in order to save the ML865C1 from power polarity inversion. This can be the same diode as for spike protection.
An example of switching regulator with 12V input is in the below schematic:
4.3.1.3. Battery Source Power Supply Design Guidelines
A single 3.7V Li-Ion cell battery type is suited for supply of Telit ML865C1 module.
WARNING:
The three cells Ni/Cd or Ni/MH 3,6 V Nom. battery types or 4V PB types MUST NOT BE USED DIRECTLY since their maximum voltage can rise over the absolute maximum voltage for the ML865C1 and damage it.
NOTE:
DON'T USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with ML865C1. Their use can lead to overvoltage on the ML865C1 and damage it. USE ONLY Li-Ion battery types.
A Bypass low ESR capacitor of adequate capacity must be provided in
order to cut the current absorption peaks, a 100μF tantalum capacitor is
usually suited.
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