RT7203T
High-Integration Fast Charge Protocols Controller with Internal
Feedback Compensation
General Description
The RT7203T is a programmable controller with
integration of super charge protocols, and the built-in
feedback compensation. An internal MCU is designed
in to handle various proprietary protocols via the D+/D-
interface.
This controller is a specific design with high integration
for off-line AC-DC converters possessing high power
density. The RT7203T integrates a constant voltage
loop, a constant current loop and the built-in
compensation in feedback control to better regulate the
design, this IC not only possesses a feature of
component saving via its feedback compensation, but
also provides an enhanced transient response and
safety protections via the integration of diverse
functions.
In applications of high precision control,
operational
amplifiers
are
adopted
in
dual
the
Features
Protocol Support
Proprietary Protocols
Highly Integrated
Suited for 3.3V to 13V VDD Range
Embedded MCU with an Mask ROM of 20kB, an
OTP-ROM of 4kB, and an SRAM of 0.75kB
Built-in Shunt Regulators for Constant Voltage
and Constant Current Control
Built-in Feedback Compensation
Built-in Temperature Sensing
Built-in 10-bit Analog-to-Digital Converter
Digital-to-Analog Converter (DAC) to provide reference
voltages used for regulation of voltage loop and current
loop in programming the constant voltage (CV) and the
constant current (CC), respectively.
VDD Pin for Quick Discharge of Output
Capacitor
< 3mA Operating Current in Normal Mode
< 1.5mA Operating Current in Sleep Mode
< 900A Operating Current in Green Mode
Protection
Adaptive Output Over-Voltage Protection
Adaptive Under-Voltage Protection
D+/D- Over-Voltage Protection
Firmware-Programmable Contant Current
Protection
Firmware-Programmable Over-Current
Protection
Firmware-Programmable Over-Temperature
Protection
Ordering Information
RT7203T
-
Programmed Firmware Code AABBX
AA : Application Code
BB : Model Code
X : Customer Approved Version Code
Package Type
S : SOP-8
Lead Plating System
G : Green (Halogen Free and Pb Free)
RT7203T Version
(Refer to Functional Table)
Applications
Travel Adapters with Fast Charge Protocols
Note :
The products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7203T-00
September
2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
