Datasheet TEA1501 (NXP) - 6

Philips Semiconductors TEA1501 GreenChip SMPS controller IC 7.2 Waveforms in the Off mode, Start-up mode and Operation mode
VDRAIN detection level VSOURCE regulation level VAUX Vout VBURST on/off VOOD level switch burst on period time switch on burst period time off startup operation mgm828
Fig 4. Waveforms of the TEA1501 in the Off mode, Start-up mode and Operation mode 7.3 Circuit block description 7.3.1 On/off/data section
The on/off/data block contains a comparator for the on/off level and is active if the drain voltage is above 50 V (DC). The typical current consumption in Off mode is 40 µA. The data signal changes the clamp level on the OOD pin to indicate data transfer: low clamp level for data-off and high clamp level for data-on.
7.3.2 VAUX management
The VAUX management block is active when the TEA1501 is in the On mode. This VAUX management block senses the AUX voltage and determines the state of the TEA1501: start-up or normal operation. During start-up the following circuits are active: On/off/data section, reference block (partial), VAUX management, temperature protection and the start-up current source. TEA1501_2 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet Rev. 02 — 31 March 2006 6 of 21
Document Outline 1. General description 2. Features 2.1 Distinctive features 2.2 Green features 2.3 Protection features 3. Quick reference data 4. Ordering information 5. Block diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 System operation 7.1.1 On/off 7.1.2 Start-up 7.1.3 Operation 7.1.4 Data transfer 7.2 Waveforms in the Off mode, Start-up mode and Operation mode 7.3 Circuit block description 7.3.1 On/off/data section 7.3.2 VAUX management 7.3.3 Start-up current source 7.3.4 Reference block 7.3.5 Temperature protection 7.3.6 Switch oscillator 7.3.7 Burst oscillator 7.3.8 Gate driver 7.3.9 Power switch 7.3.10 Primary current comparator 7.3.11 Leading edge blanking 7.3.12 Modulator 7.3.13 Counter 7.3.14 Supply current tracking 7.4 Design Equations 7.4.1 Primary peak current 7.4.1.1 Minimum value of RSOURCE 7.4.2 Switch oscillator 7.4.2.1 Range of RREF values 7.4.3 Leading edge blanking 7.4.4 Burst oscillator 7.4.4.1 Minimum value of CBURST 8. Limiting values 9. Thermal characteristics 10. Characteristics 11. Test information 11.1 Quality information 12. Package outline 13. Soldering 13.1 Introduction to soldering surface mount packages 13.2 Reflow soldering 13.3 Wave soldering 13.4 Manual soldering 13.5 Package related soldering information 14. Revision history 15. Legal information 15.1 Data sheet status 15.2 Definitions 15.3 Disclaimers 15.4 Trademarks 16. Contact information 17. Contents