®
RT7205A
Programmable SMPS and USB Type-C Controller
General Description
The RT7205A is a highly integrated and programmable
SMPS controller at the secondary side. It provides the
necessary functions and protections for high efficient and
high power density off-line AC-DC converter designs. The
RT7205A integrates an MCU to handle various proprietary
protocols (e.g., FCP, SCP and AFC) through D+/D-
interface and also support USB Type-C via CC1/CC2 pins.
An internal synchronous rectifier controller can optimize
efficiency and provide safe operate in both continuous-
conduction mode (CCM) and discontinuous-conduction
mode (DCM) even in the condition of a wide output voltage
range of 3V to 12V. Dual
operational amplifiers with
respectively programmable reference voltages are included
for voltage-loop and current-loop regulation to provide
programmable constant-voltage (CV) and constant-current
(CC) regulation in high precision.
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Features
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Protocols Supported
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SCP, FCP, AFC and Proprietary Protocols
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USB Type-C
Highly Integrated
Embedded MCU with an Mask-ROM of 16kB, an
OTP-ROM of 8kB, and an SRAM of 0.75kB
Built-in Synchronous Rectifier Driver and
Controller
Built-in Charge Pump for a Wide V
DD
Operation
Range of 3V to 12V
Built-in Shunt Regulator for Programmable
Constant-Voltage and Constant-Current Control
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Programmable Cable Compensation
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BLD Pin for Quick Discharge of Output Capacitor
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Ordering Information
RT7205A
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USBP Pin for Direct Drive of External Blocking
N-MOSFET
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Power-Saving Mode in Standby Mode
Protection
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Programmed Firmware Code AABBX
AA : Application Code
BB : Model Code
X : Customer Approved Version Code
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 2)
Lead Plating System
G : Green (Halogen Free and Pb Free)
RT7205A Version
(Refer to Version Table)
Adaptive Over-Voltage Protection
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Adaptive Under-Voltage Protection
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Firmware-Programmable Over-Current Protection
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Firmware-Programmable Over-Temperature
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Protection
Applications
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Travel Adaptors with Fast Charge Protocols (e.g., FCP,
SCP and AFC)
Travel Adaptors with USB Type-C Control (e.g., 5V/1.5A
and 5V/3A)
Note :
Richtek products are :
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Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
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Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7205A-00 February 2018
www.richtek.com
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
