Datasheet InnoSwitch3-EP (Power Integrations) - 7

InnoSwitch3-EP
be used independently from the primary sensed OVP or in conjunction. to limit the range of constant current (CC) operation and is included
FEEDBACK Pin Short Detection
to support high power charger applications. If the sensed FEEDBACK pin voltage is below V at start-up, the
SECONDARY BYPASS Pin Overvoltage Protection
FB(OFF) secondary control er will complete the handshake to take control of The InnoSwitch3-EP secondary control er features a SECONDARY the primary complete t and will stop requesting cycles to initiate BYPASS pin OV feature similar to the PRIMARY BYPASS pin OV SS(RAMP) auto-restart (no cycle requests made to primary for longer than t feature. When the secondary is in control, in the event that the AR(SK) second triggers auto-restart). SECONDARY BYPASS pin current exceeds I (~7 mA) the BPS(SD) secondary will send a command to the primary to initiate an During normal operation, the secondary will stop requesting pulses auto-restart off-time (t ). from the primary to initiate an auto-restart cycle when the FEEDBACK AR(OFF) pin voltage fal s below the V threshold. The deglitch filter on the FB(OFF)
Output Constant Current and Constant Power Regulation
protection mode is on for less than ~10 ms. By this mechanism, the The InnoSwitch3-EP 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
Auto-Restart Thresholds
output voltage sensed on the OUTPUT VOLTAGE pin. If constant The OUTPUT VOLTAGE pin includes a comparator to detect when the current regulation is not required, the ISENSE pin must be tied to the output voltage fal s below V or V , for a duration exceeding SECONDARY GROUND pin. The InnoSwitch3-EP has constant current FB(AR) VO(AR) t or t respectively. The secondary control er will relinquish regulation below the V threshold, and a constant output power FB(AR) VO(AR) PK control when this fault condition is detected. This threshold is meant profile above the V threshold. The transition between CP and CC is PK -8147-102816 Request Window PI Output Voltage
FORWARD Pin Voltage Time Primary VDS Time
Figure 8. Intelligent Quasi-Resonant Mode Switching.
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Rev. G 07/19 www.power.com Document Outline Product Highlights Description Output Power Table Pin Functional Description InnoSwitch3-EP Functional Description Primary Controller Secondary Controller Applications Example Key Application Considerations Selection of Components Components for InnoSwitch3-EP Primary-Side Circuit Components for InnoSwitch3-EP Secondary-Side Circuit 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