Datasheet InnoSwitch3-CP (Power Integrations) - 7
| Fabricante | Power Integrations |
| Descripción | Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary-Side Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile |
| Páginas / Página | 34 / 7 — InnoSwitch3-CP. Cable Drop Compensation (CDC). Auto-Restart Thresholds. … |
| Formato / tamaño de archivo | PDF / 3.2 Mb |
| Idioma del documento | Inglés |
InnoSwitch3-CP. Cable Drop Compensation (CDC). Auto-Restart Thresholds. Voltage. FEEDBACK Pin. Load Current
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InnoSwitch3-CP Cable Drop Compensation (CDC)
The amount of cable drop compensation is a function of the load with X × VFB respect to the constant current regulation threshold as il ustrated in Figure 9. Cable Drop
Auto-Restart Thresholds
Compensation The OUTPUT VOLTAGE pin includes a comparator to detect when the
Voltage
output voltage fal s below V or V , for a duration exceeding FB(AR) VOUT(AR) VFB t or t respectively. The secondary control er will relinquish
FEEDBACK Pin
FB(AR) VOUT(AR) control when this fault condition is detected. This threshold is meant to limit the range of constant current (CC) operation and is included to support high power charger applications. No-Load Onset of CC
Load Current
Regulation
SECONDARY BYPASS Pin Overvoltage Protection
The InnoSwitch3-CP secondary control er features a SECONDARY PI-8035-072516 BYPASS pin OV feature similar to the PRIMARY BYPASS pin OV feature. When the secondary is in control, in the event that the SECONDARY Figure 9. Cable Drop Compensation Characteristics. BYPASS pin current exceeds I (~7 mA) the secondary will send a BPS(SD) command to the primary to initiate an auto-restart off-time (t ) or AR(OFF) During normal operation, the secondary will stop requesting pulses latch-off (see Secondary Fault Response in Feature Code Addendum). from the primary to initiate an auto-restart cycle when the FEEDBACK pin voltage fal s below the V threshold. The deglitch filter on the
Output Constant Current and Constant Power Regulation
FB(OFF) protection mode is on for less than ~10 ms. By this mechanism, the The InnoSwitch3-CP regulates the output current through an external secondary will relinquish control after detecting that the FEEDBACK current sense resistor between the ISENSE and SECONDARY pin is shorted to ground. GROUND pins and also controls output power in conjunction with the output voltage sensed on the OUTPUT VOLTAGE pin. If constant -8147-102816 Request Window PI Output Voltage
FORWARD Pin Voltage Time Primary VDS Time
Figure 10. Intelligent Quasi-Resonant Mode Switching.
7
Rev. E 07/19 www.power.com Document Outline Product Highlights Description Output Power Table Pin Functional Description InnoSwitch3-CP Functional Description Primary Controller Secondary Controller Applications Example Key Application Considerations Selection of Components Recommendations for Circuit Board Layout Layout Example Quick Design Checklist Absolute Maximum Ratings Thermal Resistance Typical Performance Curves InSOP-24D Package Drawing InSOP-24D Package Marking Part Ordering Table MSL Table ESD and Latch-Up Table Part Ordering Information
The amount of cable drop compensation is a function of the load with X × VFB respect to the constant current regulation threshold as il ustrated in Figure 9. Cable Drop
Auto-Restart Thresholds
Compensation The OUTPUT VOLTAGE pin includes a comparator to detect when the
Voltage
output voltage fal s below V or V , for a duration exceeding FB(AR) VOUT(AR) VFB t or t respectively. The secondary control er will relinquish
FEEDBACK Pin
FB(AR) VOUT(AR) control when this fault condition is detected. This threshold is meant to limit the range of constant current (CC) operation and is included to support high power charger applications. No-Load Onset of CC
Load Current
Regulation
SECONDARY BYPASS Pin Overvoltage Protection
The InnoSwitch3-CP secondary control er features a SECONDARY PI-8035-072516 BYPASS pin OV feature similar to the PRIMARY BYPASS pin OV feature. When the secondary is in control, in the event that the SECONDARY Figure 9. Cable Drop Compensation Characteristics. BYPASS pin current exceeds I (~7 mA) the secondary will send a BPS(SD) command to the primary to initiate an auto-restart off-time (t ) or AR(OFF) During normal operation, the secondary will stop requesting pulses latch-off (see Secondary Fault Response in Feature Code Addendum). from the primary to initiate an auto-restart cycle when the FEEDBACK pin voltage fal s below the V threshold. The deglitch filter on the
Output Constant Current and Constant Power Regulation
FB(OFF) protection mode is on for less than ~10 ms. By this mechanism, the The InnoSwitch3-CP regulates the output current through an external secondary will relinquish control after detecting that the FEEDBACK current sense resistor between the ISENSE and SECONDARY pin is shorted to ground. GROUND pins and also controls output power in conjunction with the output voltage sensed on the OUTPUT VOLTAGE pin. If constant -8147-102816 Request Window PI Output Voltage
FORWARD Pin Voltage Time Primary VDS Time
Figure 10. Intelligent Quasi-Resonant Mode Switching.
7
Rev. E 07/19 www.power.com Document Outline Product Highlights Description Output Power Table Pin Functional Description InnoSwitch3-CP Functional Description Primary Controller Secondary Controller Applications Example Key Application Considerations Selection of Components Recommendations for Circuit Board Layout Layout Example Quick Design Checklist Absolute Maximum Ratings Thermal Resistance Typical Performance Curves InSOP-24D Package Drawing InSOP-24D Package Marking Part Ordering Table MSL Table ESD and Latch-Up Table Part Ordering Information