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RT8481AGE

Description
IC SECONDARY SIDE CTRLR 6SOT23
Categorysemiconductor    Power management   
File Size175KB,10 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Environmental Compliance
Download Datasheet Parametric View All

RT8481AGE Overview

IC SECONDARY SIDE CTRLR 6SOT23

RT8481AGE Parametric

Parameter NameAttribute value
applicationsecondary side controller
Voltage - input-
Voltage - Power4.75 V ~ 50 V
Current - Power500µA
Operating temperature-40°C ~ 85°C
Installation typesurface mount
Package/casingSOT-23-6
Supplier device packagingSOT-23-6
®
RT8481A
SPS Secondary-Side CC/CV Controller
General Description
The RT8481A is a secondary-side CC/CV controller for
SPS applications. It integrates a Constant Current (CC)
regulating amplifier, a Constant Voltage (CV) regulating
amplifier, and 2 precision reference voltages.
The CC regulating amplifier is featured with an extended
input common mode voltage below GND level to insure
the performance of low-side current sense, and a very low
input offset voltage to guarantee the sensing accuracy. A
60mV reference voltage is internally connected between
the inverting input of the CC regulating amplifier and the
CP pin. The non-inverting input is the CN pin, at which the
voltage will be regulated 60mV higher than that at the CP
pin. The inverting input pin CP is equiped with
−5V
anti-
reverse immunity.
The CV regulating amplifier with low input offset voltage is
biased with a 2.5V reference voltage at the inverting input.
The non-inverting input is the FB pin, at which the voltage
will be regulated with 2.5V from GND. The CC and CV
amplifiers share an open-collector output pin to minimize
application circuit.
The RT8481A is available in the SOT-23-6 package.
Features
Secondary-Side Constant Voltage (CV) and Constant
Current (CC) Control
4.75V to 50V Operation Voltage Range
±
1% Output Voltage Accuracy at Full Temperature
Range
0.6mA Quiescent Current
Smooth Transition Between CC and CV Control
Loops
5V Negative Voltage Tolerance at CP pin
Applications
Battery Chargers
AC/DC Adaptors
LED Drivers
Simplified Application Circuit
V
OUT
Opto
VCC
R
VC1
C
VC1
RT8481A
OUT
FB
C
IC1
R
IC1
R1
R2
CP
CN
R
IC2
GND
R
S
GND
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS8481A-00 January 2016
www.richtek.com
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