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RT7220A

Richtek
Part Number RT7220A
Manufacturer Richtek
Description Synchronous Rectifier Controller
Published Sep 10, 2023
Detailed Description RT7220A Synchronous Rectifier Controller with Wide Output Voltage Operating Range General Description The RT7220A is a...
Datasheet PDF File RT7220A PDF File

RT7220A
RT7220A

Overview
RT7220A Synchronous Rectifier Controller with Wide Output Voltage Operating Range General Description The RT7220A is a high performance Synchronous Rectifier (SR) controller for flyback converters operating in Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM) and Quasi-Resonant (QR) mode.
This SR controller senses the drain voltage of MOSFET to determine SR gate on/off so as to minimize turn-off dead-time and enhance efficiency.
The RT7220A is designed to support a wide output voltage range of 3V to 22V, and an HV LDO is especially built-in for the MOSFET gate driver to operate at low output voltage.
Furthermore, the RT7220A offers a Green Mode operation, in light load condition, in which the RT7220A counts the gate pulse of MOSFET to determine the timing for entering green mode and to reduce operation current under 160A.
The recommended junction temperature range is −40C to 125C, and the ambient temperature range is −40C to 105C.
Ordering Information RT7220A Package Type E : SOT-23-6 Lead Plating System G : Richtek Green Policy Compliant RT7220A Version (Refer to Version Table) Note: Richtek products are Richtek Green Policy compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
Features ⚫ Suitable for High/Low-Side SR Control of Flyback in CCM, DCM and Quasi-Resonant Mode ⚫ Suitable for 3V to 22V VOUT Range ⚫ <1.
2mA Operating Current in Normal Mode (Without SR Driver) ⚫ <160A Operating Current in Green Mode ⚫ Built-in HV LDO to Supply SR Driver when VOUT Lower than 5V ⚫ Automatic Tracking Control to Optimize Efficiency ⚫ 300kHz Maximum Operation Frequency ⚫ Protection  SR Gate Driver with 6V Clamp  SR Gate Initial Output Low Clamping Voltage before Start-Up  Optional Minimum Period Protection  Optional SR Minimum Off-Time  VG Fast Turn-Off (The Total Delay is Less than 35ns) Applications ⚫ Travel Adapters with Fast Charge Protocols (e.
g.
, FCP, SCP, AFC and QC2.
0/QC3.
0) ⚫ Travel Adapters with USB PD Type...


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