AS3728-BWLT

AS3728-BWLT Datasheet

AS3728

Part	Datasheet
AS3728-BWLT	AS3728-BWLT (pdf)

Related Parts	Information
AS3728-BWLM	AS3728-BWLM

PDF Datasheet Preview
AS3728 8A Power Stage Figure 1 Added Value of Using AS3728 The AS3728 is a companion power stage, intended to be used with AS372x products. It cannot be used without a DCDC controller. It contains the power FETs for 2 phases and is capable to handle output currents up of 4A per phase. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3728, 8A Power Stage are listed below: • Support for single or dual phase operation • 2 x 4A output stages are running on 1.3MHz • Over temperature protection • Cost effective, small package • 2 phases with separate control input • Separate power low-side NMOS & high-side NMOS for 4A per phase • Separate coil current feedback per phase • Stand-alone zero-crossing operation • Integrated temperature monitoring • WL-CSP24 with 0.4mm pitch The device is a high current dual-phase DCDC and ideal for • Mobile phones • Tablets • Notebooks ams Datasheet [v1-03] 2015-Aug-31 Page 1 Document Feedback Figure 2 AS3728 Block Diagram AS3728 − General Description Block Diagram The functional blocks of this device for reference are shown below: PWM Logic ov_curr ramp Vov_current Current sense VSUP C T R L2 C T R L1 RCSNS VRef error ota TEMP C T R L1 5VSU P N gate N gate Logic H VSU P BOOST1 Isense Zcomp 47uF PVSS AS3728 Block Diagram This figure shows the block diagram of the DCDC controller inside the Main PMIC and the AS3728 Power Stage with all relevant system components. Page 2 Document Feedback ams Datasheet [v1-03] 2015-Aug-31 AS3728 − Pin Assignment Pin Assignment AS3728 − Ordering & Contact Information Ordering & Contact Information Figure 17 Ordering Information Ordering Code AS3728-BWLT Power Stage for Multi-Phase DCDC AS3728-BWLM Power Stage for Multi-Phase DCDC Package Delivery Form Delivery Quantity 24-pin WL-CSP Tape & Reel 12000 pcs/reel 24-pin WL-CSP Mini T & R 500 pcs/reel Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit: Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel +43 0 3136 500 0 Website: ams Datasheet [v1-03] 2015-Aug-31 Page 13 Document Feedback AS3728 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material . Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 14 Document Feedback ams Datasheet [v1-03] 2015-Aug-31 AS3728 − Copyrights & Disclaimer 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. 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 Datasheet [v1-03] 2015-Aug-31 Page 15 Document Feedback Document Status AS3728 − Document Status Document Status Product Status Definition Product Preview Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Preliminary Datasheet Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Page 18 Document Feedback ams Datasheet [v1-03] 2015-Aug-31

PDF Datasheet Preview

AS3728
8A Power Stage

Figure 1 Added Value of Using AS3728
The AS3728 is a companion power stage, intended to be used with AS372x products. It cannot be used without a DCDC controller. It contains the power FETs for 2 phases and is capable to handle output currents up of 4A per phase. Ordering Information and Content Guide appear at end of datasheet.

Key Benefits & Features

The benefits and features of AS3728, 8A Power Stage are listed below:
• Support for single or dual phase operation
• 2 x 4A output stages are running on 1.3MHz
• Over temperature protection
• Cost effective, small package
• 2 phases with separate control input
• Separate power low-side NMOS & high-side NMOS for 4A per phase
• Separate coil current feedback per phase
• Stand-alone zero-crossing operation
• Integrated temperature monitoring
• WL-CSP24 with 0.4mm pitch

The device is a high current dual-phase DCDC and ideal for
• Mobile phones
• Tablets
• Notebooks
ams Datasheet [v1-03] 2015-Aug-31

Page 1 Document Feedback

Figure 2 AS3728 Block Diagram

AS3728 − General Description

Block Diagram

The functional blocks of this device for reference are shown below:

PWM Logic
ov_curr
ramp

Vov_current

Current sense

VSUP C T R L2

C T R L1

RCSNS

VRef
error ota

TEMP C T R L1
5VSU P N gate

N gate

Logic

H VSU P BOOST1

Isense Zcomp
47uF

PVSS

AS3728 Block Diagram This figure shows the block diagram of the DCDC controller inside the Main PMIC and the AS3728 Power Stage with all relevant system components.

Page 2 Document Feedback
ams Datasheet [v1-03] 2015-Aug-31

AS3728 − Pin Assignment

Pin Assignment
AS3728 − Ordering & Contact Information
Ordering & Contact Information
Figure 17 Ordering Information
Ordering Code

AS3728-BWLT

Power Stage for Multi-Phase DCDC

AS3728-BWLM

Power Stage for Multi-Phase DCDC

Package Delivery Form Delivery Quantity
24-pin WL-CSP

Tape & Reel
12000 pcs/reel
24-pin WL-CSP

Mini T & R
500 pcs/reel

Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit:

Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe

Tel +43 0 3136 500 0 Website:
ams Datasheet [v1-03] 2015-Aug-31

Page 13 Document Feedback

AS3728 − RoHS Compliant & ams Green Statement

RoHS Compliant & ams Green Statement

RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material .

Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

Page 14 Document Feedback
ams Datasheet [v1-03] 2015-Aug-31

AS3728 − Copyrights & Disclaimer

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.

Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
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 Datasheet [v1-03] 2015-Aug-31

Page 15 Document Feedback

Document Status

AS3728 − Document Status

Document Status Product Status

Definition

Product Preview

Pre-Development

Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice

Preliminary Datasheet

Pre-Production

Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice
Page 18 Document Feedback
ams Datasheet [v1-03] 2015-Aug-31

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS3728-BWLT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3728-BWLT 519718