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TDP for SQL is the IBM's original Data Protection schema for SQL. It uses APIs to talk with the DB and TSM for Transaction LOG and Full/DIFF DB backups.
FCM or FlashCopy Manager is a new overlay with TDP for SQL to enable point-in-time snapshot backups. Needless to say, you need TDP installed for this to work.
To clarify, you can OPT NOT to work (backup) with a TSM Server (truly the TSM portion is for longer retention and DR) if your intent is short term Operational Recovery. In this case, you will store the resulting snapshot in a disk space, or SAN (like System XIV, or EMC with the rocket adapter, etc).