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RT4823WSC Datasheet(PDF) 3 Page - Richtek Technology Corporation

No. de pieza RT4823WSC
Descripción Electrónicos  Wide Input and Ultra-Low Quiescent Current Boost Converter with High Efficiency
PDF  20 Pages
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Fabricante Electrónico  RICHTEK [Richtek Technology Corporation]
Página de inicio  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT4823WSC Datasheet(HTML) 3 Page - Richtek Technology Corporation

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RT4823
Copyright © 2022 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4823-01
September 2022
www.richtek.com
3
Functional Block Diagram
VIN
SW
aFB
VOUT
VREF
PWM Control Logic
R1
C1
C2
Driver
Valley
Current
Sense
Peak
Current
Sense
Control Logic
EN
BP
Soft-Start
gm
+
-
GND
RFB1
RFB2
SWELL
VIN
VOUT
VINH
FAULT
OTP
OVP
SCP
OCP
sDis_chg
Operation
The RT4823 combines built-in power transistors,
synchronous rectification, and low supply current, and it
provides a compact solution for system using advanced
Li-Ion battery chemistries.
In boost mode, output voltage regulation is guaranteed
to maximum load current of 1.5A. Quiescent current in
Shutdown mode is less than 1
A, which maximizes the
battery life.
Power-On Reset
If input voltage is lower than POR, the internal digital
and analog circuit are disabled. If input voltage is higher
than POR, the Boost converter behavior is shown as
follows :
1. IC Digital circuit will be activated.
2. Internal register will be loaded in default value.
3. Boost
converter
will
enter
free-running
mode
(detailed information is shown in free-running mode
section).
4. If VOUT > 2.2V (or VIN > 2.2V), Boost converter will
enter closed loop control and load in E-fuse value to
the internal register.



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