SEA01 Constant voltage and current controller with online digital trimming Datasheet - production data Redundant OTP (first and second trimming) Extended operating voltage range Very low quiescent current Offered in an SO8 package SO8 Applications SMPS requiring accurate voltage and current Figure 1. Internal schematic regulation F9F AC-DC adapters 9UH9UH II 99 Battery chargers 77 O RFN & // ,,** 77 Description ,,0000**,,11 OUOU 9FW9FW (( ,1,1 &+&+ 00 9UH9UH II ,, SEA01 is a highly integrated solution for SMPS applications requiring precise voltage and current 7 regulation. The device integrates two voltage references, two *QG QVH , HV op-amps (with open-drain outputs), a low-side current sensing circuit and an online digital Figure 2. Pin connections (top view) trimming machine. The internal reference Vref , along with one op- V N F DWD amp, is the core of the voltage control loop. The internal reference Vref and the other op-amp I O 2XW make up the current control loop. The embedded digital trimming allows the user, through software, H QV ,VH 2XW to adjust and permanently store both Vref and V Vref internal references during the production test I 9 of the end product, compensating the tolerance of the external components and the error due to their discretized values. Redundant OTP gives the user a second chance to change the values stored in the non-volatile memory of the IC during Features the first trimming process. Online digital trimming for the highest end- This feature allows having the highest end- product accuracy in voltage and current control product accuracy of voltage and current control Automatic operation eliminates manual without the use of external discrete components intervention in the production line or manual intervention. Simple and robust trimming protocol and storage May 2013 DocID024452 Rev 1 1/24 This is information on a product in full production. www.st.com 24 FF *1 9FWU &OR 28 DWD DWD 7575 , , 2828Contents SEA01 Contents 1 Absolute maximum ratings . 4 2 Application information 7 2.1 Constant voltage and current control and with online digital trimming 7 3 Online digital trimming procedure 9 3.1 General features . 9 3.2 Device address . 10 3.3 Device commands 11 3.4 Emulation commands 11 3.4.1 Emulate Vref 12 V 3.4.2 Emulate Vref . 14 I 3.5 Read commands and status register 16 3.5.1 Read Vref . 16 V 3.5.2 Read Vref . 17 I 3.6 Write NVM (OTP) . 17 3.7 Reload NVM (OTP) . 19 4 Package mechanical data 20 5 Ordering information . 22 6 Revision history . 23 2/24 DocID024452 Rev 1