Eval Kit Manual
DN[Document ID]
AS1312
Standard Board
AS1312-TD-50_EK_ST ams Eval Kit Manual
[v2-01] 2014-Sep-10
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AS1312 Standard Board
1
1.1
2
3
3.1
4
4.1
5
6
4.2
4.3
7
Table of Contents
Introduction .......................................................................................................................... 3
Kit Content ........................................................................................................................... 3
Getting Started ..................................................................................................................... 4
Hardware Description........................................................................................................... 4
LBI setting ............................................................................................................................ 6
Schematics, Layers and BOM ............................................................................................. 7
Schematic of AS1312 Evaluation Board .............................................................................. 7
Layers of AS1312 Evaluation Board .................................................................................... 8
BOM ..................................................................................................................................... 9
Ordering & Contact Information ......................................................................................... 10
Copyrights & Disclaimer ..................................................................................................... 11
Revision Information .......................................................................................................... 12
ams Eval Kit Manual
[v2-01] 2014-Sep-10
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AS1312 Standard Board
1 Introduction
This document describes the AS1312 Evaluation Kit.
The AS1312 is an ultra low quiescent current hysteretic step-up DC-DC converter which achieves an efficiency of up to 94%.
1.1 Kit Content
Figure 1: Kit Content
Item
AS1312 Evalboard v2.1
Comment
ultra low quiescent current hysteretic stepup DC-DC converter
ams Eval Kit Manual
[v2-01] 2014-Sep-10
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AS1312 Standard Board
2 Getting Started
Drive the AS1312 hysteretic step-up DC-DC converter only with the recommended settings and values as described in the datasheet.
Please check www.ams.com
for the latest version.
A detailed overview of AS1312 Evaluation Board is given in chapter 3,
Hardware Description
.
3 Hardware Description
The AS1312 Evalboard comes factory mounted with version AS1312-BTDT-50, providing 5.0V on Vout but it is designed to work with all available AS1312 TDFN versions as well.
The Evaluation Board has to be supplied via the pins Vin and GND in the range of 0.7V up to
5.0V.
For enabling the device jumper “EN” (J2) must be set to “on”, section B in
Figure 2
.
Figure 2: Evaluation Board Overview
A B C D
F
G
E
H
I
J
K ams Eval Kit Manual
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AS1312 Standard Board
Jumper and device locations
Label Name
A Vin
B
C
D
E
F
G
H
I
J
K
EN
LBO
Vout
LBI
AS1312
Load
GND
Vin
GND
Vout
Designator
BU1
J2
TP4
BU3
J1
U1
J3
BU2
TP1
TP5
TP3
Description
Input voltage
Enable
Low Battery
Comparator Output
Measurement point
Output voltage
Low Battery
Comparator Input
Factory mounted version with
5.0V
Connected to VR2:
The LBI monitors Vin via the resistive divider.
Connected to GND:
LBO works like a POK.
This jumper may not be left floating!
8-pin (2x2) TDFN
Load connector
GND
Input voltage
GND
Output voltage
Info
Voltage range from 0.7V to 5.0V
Connect to the pos. terminal of the supply voltage on: The AS1312 is enabled off: The AS1312 is disabled
Ultra low quiescent current hysteretic step-up DC-DC converter
Designated for load connection
Connect to the neg. terminal of the supply voltage
Measurement point
Measurement point
Measurement point
For detailed information according electrical characteristics please refer to the AS1312 datasheet. The latest version of the datasheet can be found on our homepage, www.ams.com
ams Eval Kit Manual
[v2-01] 2014-Sep-10
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3.1 LBI setting
For input voltage monitoring,
set jumper “LBI” (J1) to “VR2”, section E in
Figure 2
. In this case
the LBO stays high as long as the voltage on the LBI pin is higher than the LBI threshold of 0.6V.
With the resistive divider R1/R2 (not mounted) the monitored voltage level (threshold) can be defined which is compared to this internal threshold of 0.6V.
Use a defined resistor for R2 and then calculate R1 as:
R1 = R2 x (V in
/ V
LBI
- 1)
V
LBI
= 0.6V
Vin = monitored voltage
For the Power-
OK (POK) feature, please set jumper “LBI” (J1) to “GND”, section E in
Figure 2
.
In this case the LBO is related to Vout and stays high as long as the Vout is higher than 92.5% of its nominal value.
ams Eval Kit Manual
[v2-01] 2014-Sep-10
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4 Schematics, Layers and BOM
The AS1312 Evaluation Board is a 2-layer FR4 board.
Figure 3: AS1312 PCB Layer Stack up
4.1 Schematic of AS1312 Evaluation Board
Figure 4: Schematic
1 2 3
A
4
B
C
D
1
ams Eval Kit Manual
[v2-01] 2014-Sep-10
BU1
TP1
Vin
Vin
R1 nm
BU2
R2 nm
GND
Vin
C1
22µF
Vin
L1
6.8µH
8
VIN
1
LBI J1
Vin
J2
TP2
LBI
EN
EN
7
EN
LX
U1
AS1312-MLPD
LBO
AS1312
DCDC step up
VOUT
REF
TP5
GND
6 LBO
4
Vout
5
Cref
0.1µF
TP4
LBO
R3
100k
C2
22µF
TP3
Vout
BU3
1
2
J3
Load
BU4
Vout
GND
2
D
3
Size
A4
Project Title
AS1312_Evalboard_TDFN
Date 12.03.2014
Originator SKRE Sheet
4
3
Revision
2.1.0
of 3
Page 7
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A
B
C
AS1312 Standard Board
4.2 Layers of AS1312 Evaluation Board
Figure 5: Top Layer
Figure 6: Bottom Layer ams Eval Kit Manual
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4.3 BOM
Figure 7: Bill of Material
Bill of
Materials
Company:
Originator:
PCB Name:
PCB Version:
Report Date:
AS1312_Evalboard_TDFN ams AG
SKRE
AS1312_Evalboard_TDFN
2.1
12.03.2014
#
1
2
3
4
5
6
7
8
9
Designator
C1, C2
Cref
J1, J2, J3
L1
R3
TP1, TP2, TP3
TP4
TP5
U1
Approved
Comment
22µF
0.1µF
LBI, EN, Load
6.8µH
100k
Vin, EN, Vout
LBO
GND
AS1312-MLPD
Component_Description
Multilayer Ceramic Capacitors MLCC -
SMD/SMT 22uF 16Volts 20%
MURATA - GRM188R71C104KA01D -
CAP, MLCC, X7R, 100NF, 16V, 0603
FISCHER ELEKTRONIK - SL11 124 36G
- HEADER, 36PIN, 2.54MM PITCH
COILCRAFT - LPS4018-682MLB -
POWER INDUCTOR 6.8UH, 1.5A,
0%,50MHZ
Manufacturer
Murata
Electronics
MURATA
FISCHER
ELEKTRONIK
COILCRAFT
Manufacturer Part
Number
GRM31CR61C226M
E15L
GRM188R71C104K
A01D
SL11 124 36G
LPS4018-682MLB
RES 100K OHM 1/10W 1% 0603 SMD Vishay Dale
CRCW0603100KFK
EA
VERO - 20-313137 - RED BEAD
TERMINAL ASSY FOR 1.02mm hole
VERO - 20-313140 - YELLOW BEAD
TERMINAL ASSY FOR 1.02mm hole
VERO - 20-2137 - BLACK BEAD
TERMINAL ASSY FOR 1.02mm hole
ULTRA LOW QUIESCENT CURRENT,
HYSTERETIC DC-DC STEP-UP
CONVERTER
Notes
VERO
VERO
VERO ams
20-313137
20-313140
20-2137
AS1312-BTDT-50
Quantity
2
1
3
1
1
3
1
1
1
14 ams Eval Kit Manual
[v2-01] 2014-Sep-10
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AS1312 Standard Board
5 Ordering & Contact Information
Ordering Code Description
AS1312-TD-50_EK_ST AS1312 Eval Kit Standard Board Vout 5.0V
Buy our products or get free samples online at:
www.ams.com/ICdirect
Technical Support is available at:
www.ams.com/Technical-Support
Provide feedback about this document at:
www.ams.com/Document-Feedback
For further information and requests, e-mail us at:
[email protected]
For sales offices, distributors and representatives, please visit:
www.ams.com/contact
Headquarters
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
ams Eval Kit Manual
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6 Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks
Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
ö
Demo Kits, Evaluation Kits and Reference Designs are provided to recipient on an “as is” basis for demonstration and evaluation purposes only and are not considered to be finished end-products intended and fit for general consumer use, commercial applications and applications with special requirements such as but not limited to medical equipment or automotive applications. Demo Kits,
Evaluation Kits and Reference Designs have not been tested for compliance with electromagnetic compatibility (EMC) standards and directives, unless otherwise specified.
Demo Kits, Evaluation Kits and Reference Designs shall be used by qualified personnel only. ams AG reserves the right to change functionality and price of Demo Kits, Evaluation Kits and
Reference Designs at any time and without notice.
Any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. Any claims and demands and any direct, indirect, incidental, special, exemplary or consequential damages arising from the inadequacy of the provided Demo Kits, Evaluation Kits and Reference Designs or incurred losses of any kind (e.g. loss of use, data or profits or business interruption however caused) as a consequence of their use are excluded. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
ams Eval Kit Manual
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7 Revision Information
Changes from 2-00 (2012-Nov-01) to current revision 2-01 (2014-Sep-10)
Update to latest ams design
Note:
Page numbers for the previous version may differ from page numbers in the current revision.
Page
all
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