Datasheet XDPS21071 (Infineon) - 8
| Fabricante | Infineon |
| Descripción | Forced Frequency Resonant Flyback controller |
| Páginas / Página | 54 / 8 — Forced Frequency Resonant Flyback controller. Functional Description. … |
| Revisión | 01_00 |
| Formato / tamaño de archivo | PDF / 2.2 Mb |
| Idioma del documento | Inglés |
Forced Frequency Resonant Flyback controller. Functional Description. Initial startup and normal operation. Figure 4
Línea de modelo para esta hoja de datos
Versión de texto del documento
link to page 31 link to page 18
Forced Frequency Resonant Flyback controller Functional Description
VVCC(t)
Initial startup and normal operation
VVCCon = 20.5 V VCC brown-in window VVCCSS VVCCBI = 9.1 V VCC self supply takes over VVCCoffOP = 7.2 V t VHV(t) ca. 1.2ms internal boot sequence VVACpeak VAC brown-in condition fulfil ed t I VCC(t) Start of GD0 switching IVCCop IVCCop1 = 7.5 mA IVCCUVOFF = 30 µA t TYPICAL STARTUP SEQUENCE
Figure 4 Typical startup sequence 4.1.2 Brown-in monitoring
Once the IC is activated, brown-in monitoring is enabled for input brown-in protection (see Chapter 4.3.4) by measuring the current at HV pin through the internal shunt resistor RM (see Chapter 4.2.2). If the input brown-in is not detected before VCC falls below VVCCBI, the startup cell measurement unit remains enabled until VCC falls down to VVCCoff. Data Sheet 8 Revision 2.0 2019-10-30
Forced Frequency Resonant Flyback controller Functional Description
VVCC(t)
Initial startup and normal operation
VVCCon = 20.5 V VCC brown-in window VVCCSS VVCCBI = 9.1 V VCC self supply takes over VVCCoffOP = 7.2 V t VHV(t) ca. 1.2ms internal boot sequence VVACpeak VAC brown-in condition fulfil ed t I VCC(t) Start of GD0 switching IVCCop IVCCop1 = 7.5 mA IVCCUVOFF = 30 µA t TYPICAL STARTUP SEQUENCE
Figure 4 Typical startup sequence 4.1.2 Brown-in monitoring
Once the IC is activated, brown-in monitoring is enabled for input brown-in protection (see Chapter 4.3.4) by measuring the current at HV pin through the internal shunt resistor RM (see Chapter 4.2.2). If the input brown-in is not detected before VCC falls below VVCCBI, the startup cell measurement unit remains enabled until VCC falls down to VVCCoff. Data Sheet 8 Revision 2.0 2019-10-30