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NXP Semiconductors AN10907 Manuals
Manuals and User Guides for NXP Semiconductors AN10907. We have
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NXP Semiconductors AN10907 manual available for free PDF download: Application Note
NXP Semiconductors AN10907 Application Note (82 pages)
resonant power supply control IC
Brand:
NXP Semiconductors
| Category:
Power Supply
| Size: 1 MB
Table of Contents
Contents
3
Related Documents
3
Scope and Setup of this Document
3
General Features
4
Resonant Conversion
4
1 Introduction
3
2 TEA1613T Highlights and Features
4
Protection
5
Protection Features
5
Resonant Half-Bridge Controller Features
5
Typical Areas of Application
5
3 Pin Overview with Functional Description
6
4 Application Diagram
9
Fig 1. Basic Application Diagram TEA1613T
9
5 Block Diagram
10
(Part 2)
11
Fig 2. TEA1613T with Application Block Diagram
10
(Part 1)
10
Fig 3. TEA1613T with Application Block Diagram
10
Basic Supply System Overview
12
Fig 4. Basic Overview Internal IC Supplies
12
6 Supply Functions
12
Supply Monitoring and Protection
12
TEA1613T Supplies
12
SUPIC - the Low Voltage IC Supply
13
SUPIC Current Consumption
13
SUPIC Start-Up
13
SUPIC Stop, UVP and Short-Circuit Protection
13
Block Diagram for SUPIC Start-Up
14
Fig 5. Block Diagram: SUPIC and SUPREG Start-Up with SUPHV and Auxiliary Supply
14
Start-Up by SUPHV
14
SUPIC Supply Using HBC Transformer Auxiliary Winding
14
Auxiliary Winding on the HBC Transformer
15
Fig 6. Auxiliary Winding on Primary Side (Left) and Secondary Side (Right)
15
SUPIC and SNSOUT/PFCON by Auxiliary Winding
15
Auxiliary Supply Voltage Variations by Output Current
16
Fig 7. Position the Auxiliary Winding for Good Output Coupling
16
Voltage Variations by Auxiliary Winding Position: Primary Side Component
16
Difference between UVP on SNSOUT/PFCON and SNSCURHBC OCP/OCR
17
Start-Up
17
Stop
17
SUPIC Supply by External Voltage
17
Supreg
17
Fig 8. Typical SUPREG Voltage Characteristics for Load and Temperature
18
Block Diagram of SUPREG Regulator
19
Fig 10. Simplified Model of MOSFET Drive
19
Fig 9. Block Diagram of Internal SUPREG Regulator
19
Supply Voltage for the Output Drivers: SUPREG
19
SUPREG During Start-Up
19
Current Load on SUPHS
20
Initial Charging of SUPHS
20
Supply Voltage for the Output Drivers: SUPHS
20
Fig 11. Typical Application of SUPHS
21
Lower Voltage on SUPHS
21
SUPREG Power Consumed by MOSFET Drivers
21
SUPREG Supply Voltage for Other Circuits
22
Burst Mode Operation
23
General
23
Normal Operation
23
Start-Up
23
Value of the Capacitor on SUPIC
23
Value of the Capacitors on SUPIC, SUPREG and SUPHS
23
Relationship between the Capacitors on SUPIC, SUPREG and SUPHS
24
Value of the Capacitor for SUPHS
24
Value of the Capacitor on SUPREG
24
Fig 12. GATELS and GATEHS Drivers
25
GATELS and GATEHS
25
7 MOSFET Drivers GATELS and GATEHS
25
Supply Voltage and Power Consumption
25
Fig 13. Examples of Gate Circuits
26
General Details Regarding MOSFET Drivers
26
Fig 14. Simplified Model of a MOSFET Drive
27
Specifications
27
Fig 15. SNSBOOST Function
28
8 HBC Functions
28
SNSBOOST Undervoltage or Brownout Protection Level
28
Start and Stop Voltage Without Series Resistance
28
HBC Switch Control
29
SNSBOOST and Compensation SNSBURST
29
Start and Stop Voltage with Series Resistance
29
Fig 16. Inductive Mode HBC Switching
30
HBC Adaptive Non-Overlap
30
Inductive Mode (Normal Operation)
30
Capacitive Mode
31
Fig 17. Adaptive Non-Overlap Switching During Normal Operating Conditions
31
Capacitive Mode Regulation (CMR)
32
Fig 18. Capacitive Mode HBC Switching
32
Fig 19. Capacitive/Inductive HBC Operating
33
Frequencies
33
Fig 20. Typical Protection and Regulation Behavior in Capacitive Mode (During Bad Start-Up)
33
Fig 21. Frequency Relationships
34
HBC Oscillator
34
Operational Control
34
HBC Drive
35
Presets
34
CFMIN and RFMAX
35
Minimum Frequency Setting for CFMIN
35
Maximum Frequency Setting for RFMAX
36
Fig 23. Typical Basic SNSFB Application
37
HBC Feedback (SNSFB)
37
RFMAX and High Frequency Protection (HFP)
37
Fig 24. SNSFB V-I Characteristics
38
Fig 25. SNSFB Voltage to Output Power Characteristics
38
Examples
38
HBC Open Loop Protection (OLP)
38
Levels
39
SSHBC/EN Soft-Start and Enable
39
Switching on and off Using an External Control Function
39
Hold and Continue
40
Soft-Start HBC
40
Voltage
41
Switching on and off Using SSHBC/EN
40
Soft-Start Voltage Levels
41
SSHBC/EN Charge and Discharge
41
Start-Up
42
SNSFB, SSHBC/EN and Soft-Start Reset - Operating Frequency Control
42
Soft-Start Reset
42
Fig 29. Soft-Start Reset and Two-Speed Soft-Start
43
Overcurrent Protection and Regulation HBC
43
Fig 30. OCP and Regulation HBC
44
HBC Overcurrent Regulation
44
HBC Overcurrent Protection
45
SNSCURHBC Boost Voltage Compensation
45
Current Measurement Circuits
46
Fig 31. SNSCURHBC: Resonant Current Measurement Configurations
46
SNSCURHBC Layout
46
Burst Mode Implementation
47
9 Burst Mode Operation
47
Fig 32. Principle of Burst Mode Operation with SNSFB and Comparator Levels
47
Fig 33. Burst Mode Application
48
PFC Burst Mode Operation Control by SNSOUT/PFCON
48
Advantages of Burst Mode in HBC
49
Fig 34. Improved Efficiency by HBC Burst Mode in
49
A 250 W Converter
49
Fig 35. Reduced Losses by HBC Burst Mode in
49
Advantages of Burst Mode for HBC and PFC Simultaneously
50
Fig 36. Increased Efficiency at Low Output Power in Burst HBC and PFC (90 W Adapter)
50
Fig 37. Remaining 90 W Adapter Losses in Burst
50
Mode
50
Basic Design of an SNSBURST Circuit
51
Choice of Burst Level and Divider Impedance
51
Fig 38. Simultaneous HBC and PFC Burst Mode Operation (and Output Voltage Ripple)
51
Fig 39. Designing the Burst Mode Level Using
51
Two Resistor Values
51
Advanced Design of SNSBURST Circuit
52
Fig 40. Compensation Current on SNSBURST
52
Advanced Design of SNSBURST Circuit Using a Series Resistor
53
Fig 41. Designing the Burst Mode Level Using a Series
53
Resistor
53
Other Aspects Regarding SNSBURST
54
Fig 42. Typical SNSFB Voltage-To-Output Power Characteristic of a Converter Without Burst Mode Functionality
55
Fig 43. Example of SNSFB and Frequency as Functions of Output Power Characteristics (Normal Mode) Adapted for Easy Implementation of Burst Mode Comparator Level Detection
55
Output Power - Operating Frequency Characteristics
55
Audible Noise
56
Fig 44. Transformer Construction
56
Lower SUPHS in Burst
56
Measurements in the Resonant Transformer Construction
56
Burst Power Dependent Noise Level
57
PFC Converter and Resonant Converter Simultaneous Bursting
57
PFC Output Voltage Variations
57
PFC Start Delay
57
Switching between Burst and Normal Operation
57
Audible Noise During Mode Transition
58
Design Guidelines for Burst Mode Operation
58
Enable/Disable Burst Mode
58
Hold HBC and PFC
58
Unused Burst Mode
58
IC Protection
59
Latched Protection
59
Overtemperature Protection (OTP)
59
10 Protection Functions
59
Protection Overview
59
Auxiliary Winding
60
Connecting External Measurement Circuits
60
Fig 45. SNSOUT Protection
60
Overvoltage Protection (OVP) Output
60
Principle of Operation
60
SNSOUT/PFCON Protection
60
Auxiliary Winding
61
Circuit Configurations
61
Snsout/Pfcon
62
Connecting External Measurement Circuits
61
OVP and UVP Combinations
61
Principle of Operation
61
Undervoltage Protection (UVP) Output
61
OVP Functionality and UVP Disabled
62
UVP Functionality and OVP Disabled
62
Snsout/Pfcon
63
Both OVP and UVP Disabled
63
Fig 48. Example of Disabling both the UVP and the OVP Functions of SNSOUT/PFCON
63
UVP During Burst Mode Operation
63
Block Diagram of the RCPROT Function
64
Fig 49. Block Diagram of the RCPROT Function
64
Fig 50. RCPROT Protection Timer Operation
64
Protection Timer
64
RCPROT Working as Protection Timer
64
Fig 51. RCPROT Operating as a Restart Timer
65
RCPROT Working as a Restart Timer
65
Dimensioning the Timer Function
66
Fig 52. Ground Structure and Current Loops in an Application with PFC
67
Grounding
67
Large Current Loops
67
11 Miscellaneous Advice and Tips
67
PCB Layout
67
Fig 53. Ground Layout Example with Star Point at the Boost Capacitor
68
Ground Layout Example
68
Miscellaneous
68
Fig 54. PCB Layout Connecting SGND, PGND, CFMIN, RFMAX and SNSCURHBC
69
Starting/Debugging Partial Circuits
69
HBC Only
70
Fig 55. Start-Up and Debugging Step-By-Step
71
Fig 56. Typical Signals During a Separate HBC Start-Up for an Increase in V
72
Boost
72
12 Application Examples and Topologies
73
Example of IC Evaluation and Test Setup
73
(Part 1)
74
Fig 57. Example of a Basic IC Test Setup on a Single Low Voltage Supply (24 V)
73
Example of a 250 W LCD-TV Application
74
Fig 58. Example of a 250 W LCD-TV Application
75
(Part 2)
75
Fig 59. Example of a 250 W LCD-TV Application
76
(Part 3)
76
13 Abbreviations
78
Definitions
79
Disclaimers
79
14 Legal Information
79
Trademarks
79
15 Tables
80
Table of Contents
80
16 Figures
80
17 Contents
82
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