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TSZ02201-0F1F0A200870-1-2
Contents
General Description ........................................................................................................................................................................ 1
Features.......................................................................................................................................................................................... 1
Key Specifications .......................................................................................................................................................................... 1
Package .......................................................................................................................................................................................... 1
Applications .................................................................................................................................................................................... 1
Typical Application Circuit ................................ ................................ ............................................................................................... 1
Contents ......................................................................................................................................................................................... 2
Pin Configuration ............................................................................................................................................................................ 3
Pin Descriptions .............................................................................................................................................................................. 3
Block Diagram ................................................................................................................................................................................ 3
Description of Blocks ...................................................................................................................................................................... 4
1 INTERNAL REGULATOR .................................................................................................................................................... 4
2 Input Low Voltage Lock Out (UVLO) .................................................................................................................................... 4
3 Thermal Shutdown (TSD) .................................................................................................................................................... 5
4 SW VOLTAGE DETECTION ................................................................................................................................................ 5
5 SOFT START ....................................................................................................................................................................... 5
6 PWM COMPARATOR ................................ ................................ .......................................................................................... 5
7 ADAPTIVE ON TIME CONTROLLER .................................................................................................................................. 5
8 Maximum Frequency Limit Function (MAX FREQ) ................................ .............................................................................. 5
9 DRIVER ............................................................................................................................................................................... 5
10 Nch MOSFET ....................................................................................................................................................................... 5
11 LOAD COMPENSATION ..................................................................................................................................................... 6
12 Frequency Spectrum Spread (SPECTRUM SPREAD) ........................................................................................................ 6
13 Over Current Protection (OCP), Battery Short Protection (BSP) .......................................................................................... 6
14 Short Circuit Protection (SCP), REF Pin Open Protection (REFOPEN) ............................................................................... 7
Absolute Maximum Ratings ............................................................................................................................................................ 8
Thermal Resistance ........................................................................................................................................................................ 8
Recommended Operating Conditions ............................................................................................................................................. 8
Electrical Characteristics................................................................................................................................................................. 9
Typical Performance Curves ......................................................................................................................................................... 10
Application Examples ................................................................................................................................................................... 18
1 Output Voltage ................................................................................................................................ ................................... 18
2 Transformer ........................................................................................................................................................................ 20
3 Output Capacitor ................................................................................................................................................................ 22
4 Input Capacitor ................................................................................................................................................................... 22
5 Secondary Output Diode .................................................................................................................................................... 23
6 Output Resistor and Output Zener Diode (Minimum Load Current) ................................................................................... 23
7 Snubber Circuit .................................................................................................................................................................. 24
8 Setting of SDX/EN Pin Resistor ......................................................................................................................................... 24
9 The Output Voltage Compensation Function by L_COMP Pin Resistor ............................................................................. 25
10 The Influence to Frequency and Output Voltage for Each Load ......................................................................................... 26
I/O Equivalence Circuits................................................................................................................................................................ 27
Operational Notes ......................................................................................................................................................................... 28
Ordering Information ..................................................................................................................................................................... 30
Marking Diagram .......................................................................................................................................................................... 30
Physical Dimension and Packing Information ............................................................................................................................... 31
Revision History ............................................................................................................................................................................ 32